./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/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_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/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_ed6bb051-6455-4b49-aa2a-570e3403d685/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 dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b --- 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 20:21:06,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:21:06,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:21:06,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:21:06,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:21:06,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:21:06,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:21:06,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:21:06,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:21:06,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:21:06,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:21:06,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:21:06,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:21:06,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:21:06,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:21:06,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:21:06,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:21:06,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:21:06,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:21:06,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:21:06,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:21:06,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:21:06,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:21:06,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:21:06,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:21:06,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:21:06,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:21:06,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:21:06,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:21:06,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:21:06,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:21:06,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:21:06,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:21:06,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:21:06,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:21:06,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:21:06,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:21:06,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:21:06,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:21:06,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:21:06,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:21:06,249 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:21:06,298 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:21:06,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:21:06,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:21:06,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:21:06,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:21:06,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:21:06,301 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:21:06,301 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:21:06,301 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:21:06,302 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:21:06,303 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:21:06,303 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:21:06,303 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:21:06,304 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:21:06,304 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:21:06,304 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:21:06,304 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:21:06,305 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:21:06,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:21:06,306 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:21:06,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:21:06,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:21:06,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:21:06,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:21:06,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:21:06,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:21:06,307 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:21:06,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:21:06,308 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:21:06,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:21:06,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:21:06,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:21:06,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:21:06,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:21:06,310 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:21:06,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:21:06,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:21:06,310 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:21:06,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:21:06,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:21:06,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:21:06,311 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_ed6bb051-6455-4b49-aa2a-570e3403d685/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b [2022-11-20 20:21:06,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:21:06,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:21:06,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:21:06,702 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:21:06,703 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:21:06,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-11-20 20:21:10,022 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:21:10,335 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:21:10,335 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-11-20 20:21:10,371 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/data/89f6e702a/0b18b1c4a5a446bf90a1903671072313/FLAGfce44f56f [2022-11-20 20:21:10,396 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/data/89f6e702a/0b18b1c4a5a446bf90a1903671072313 [2022-11-20 20:21:10,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:21:10,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:21:10,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:21:10,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:21:10,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:21:10,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:21:10" (1/1) ... [2022-11-20 20:21:10,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@616f1198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:21:10, skipping insertion in model container [2022-11-20 20:21:10,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:21:10" (1/1) ... [2022-11-20 20:21:10,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:21:10,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:21:10,646 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_ed6bb051-6455-4b49-aa2a-570e3403d685/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2022-11-20 20:21:10,762 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_ed6bb051-6455-4b49-aa2a-570e3403d685/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2022-11-20 20:21:10,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:21:10,888 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:21:10,906 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_ed6bb051-6455-4b49-aa2a-570e3403d685/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2022-11-20 20:21:10,929 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_ed6bb051-6455-4b49-aa2a-570e3403d685/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2022-11-20 20:21:11,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:21:11,052 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:21:11,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:21:11 WrapperNode [2022-11-20 20:21:11,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:21:11,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:21:11,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:21:11,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:21:11,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:21:11" (1/1) ... [2022-11-20 20:21:11,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:21:11" (1/1) ... [2022-11-20 20:21:11,183 INFO L138 Inliner]: procedures = 69, calls = 82, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 813 [2022-11-20 20:21:11,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:21:11,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:21:11,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:21:11,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:21:11,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:21:11" (1/1) ... [2022-11-20 20:21:11,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:21:11" (1/1) ... [2022-11-20 20:21:11,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:21:11" (1/1) ... [2022-11-20 20:21:11,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:21:11" (1/1) ... [2022-11-20 20:21:11,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:21:11" (1/1) ... [2022-11-20 20:21:11,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:21:11" (1/1) ... [2022-11-20 20:21:11,287 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:21:11" (1/1) ... [2022-11-20 20:21:11,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:21:11" (1/1) ... [2022-11-20 20:21:11,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:21:11,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:21:11,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:21:11,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:21:11,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:21:11" (1/1) ... [2022-11-20 20:21:11,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:21:11,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:21:11,377 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:21:11,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:21:11,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:21:11,435 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-20 20:21:11,435 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-20 20:21:11,435 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-20 20:21:11,436 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-20 20:21:11,436 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-20 20:21:11,436 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-20 20:21:11,436 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-20 20:21:11,436 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-20 20:21:11,437 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-20 20:21:11,437 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-20 20:21:11,437 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-20 20:21:11,437 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-20 20:21:11,437 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-20 20:21:11,438 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-20 20:21:11,438 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-20 20:21:11,438 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-20 20:21:11,438 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-20 20:21:11,439 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-20 20:21:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-20 20:21:11,440 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-20 20:21:11,440 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-20 20:21:11,440 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-20 20:21:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:21:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-20 20:21:11,442 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-20 20:21:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-20 20:21:11,442 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-20 20:21:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:21:11,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:21:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-20 20:21:11,443 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-20 20:21:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-20 20:21:11,444 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-20 20:21:11,653 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:21:11,655 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:21:12,758 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:21:13,332 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:21:13,332 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-20 20:21:13,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:21:13 BoogieIcfgContainer [2022-11-20 20:21:13,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:21:13,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:21:13,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:21:13,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:21:13,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:21:10" (1/3) ... [2022-11-20 20:21:13,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629509f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:21:13, skipping insertion in model container [2022-11-20 20:21:13,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:21:11" (2/3) ... [2022-11-20 20:21:13,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629509f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:21:13, skipping insertion in model container [2022-11-20 20:21:13,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:21:13" (3/3) ... [2022-11-20 20:21:13,364 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-11-20 20:21:13,386 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:21:13,386 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 20:21:13,473 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:21:13,483 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;@3160a42e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:21:13,484 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 20:21:13,491 INFO L276 IsEmpty]: Start isEmpty. Operand has 222 states, 166 states have (on average 1.536144578313253) internal successors, (255), 174 states have internal predecessors, (255), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-20 20:21:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 20:21:13,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:13,507 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] [2022-11-20 20:21:13,508 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:13,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1717664810, now seen corresponding path program 1 times [2022-11-20 20:21:13,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:21:13,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867382819] [2022-11-20 20:21:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:13,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:21:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:13,890 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 20:21:13,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:21:13,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867382819] [2022-11-20 20:21:13,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867382819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:21:13,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:21:13,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:21:13,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397387362] [2022-11-20 20:21:13,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:21:13,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:21:13,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:21:13,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:21:13,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:21:13,957 INFO L87 Difference]: Start difference. First operand has 222 states, 166 states have (on average 1.536144578313253) internal successors, (255), 174 states have internal predecessors, (255), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 20:21:14,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:14,628 INFO L93 Difference]: Finished difference Result 494 states and 733 transitions. [2022-11-20 20:21:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:21:14,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-20 20:21:14,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:14,645 INFO L225 Difference]: With dead ends: 494 [2022-11-20 20:21:14,645 INFO L226 Difference]: Without dead ends: 276 [2022-11-20 20:21:14,651 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 20:21:14,655 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 377 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:14,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 548 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:21:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-20 20:21:14,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 269. [2022-11-20 20:21:14,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 201 states have (on average 1.4328358208955223) internal successors, (288), 206 states have internal predecessors, (288), 46 states have call successors, (46), 22 states have call predecessors, (46), 20 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-20 20:21:14,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 376 transitions. [2022-11-20 20:21:14,730 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 376 transitions. Word has length 45 [2022-11-20 20:21:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:14,731 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 376 transitions. [2022-11-20 20:21:14,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 20:21:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 376 transitions. [2022-11-20 20:21:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 20:21:14,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:14,735 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] [2022-11-20 20:21:14,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:21:14,735 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:14,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1658327863, now seen corresponding path program 1 times [2022-11-20 20:21:14,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:21:14,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930096250] [2022-11-20 20:21:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:14,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:21:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:14,937 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 20:21:14,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:21:14,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930096250] [2022-11-20 20:21:14,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930096250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:21:14,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:21:14,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:21:14,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777216576] [2022-11-20 20:21:14,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:21:14,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:21:14,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:21:14,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:21:14,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:21:14,943 INFO L87 Difference]: Start difference. First operand 269 states and 376 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 20:21:15,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:15,854 INFO L93 Difference]: Finished difference Result 671 states and 879 transitions. [2022-11-20 20:21:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:21:15,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-20 20:21:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:15,863 INFO L225 Difference]: With dead ends: 671 [2022-11-20 20:21:15,863 INFO L226 Difference]: Without dead ends: 539 [2022-11-20 20:21:15,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:21:15,872 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 792 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:15,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 1001 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:21:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-20 20:21:15,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 455. [2022-11-20 20:21:15,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 333 states have (on average 1.3453453453453454) internal successors, (448), 339 states have internal predecessors, (448), 73 states have call successors, (73), 45 states have call predecessors, (73), 47 states have return successors, (73), 72 states have call predecessors, (73), 69 states have call successors, (73) [2022-11-20 20:21:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 594 transitions. [2022-11-20 20:21:15,979 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 594 transitions. Word has length 45 [2022-11-20 20:21:15,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:15,980 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 594 transitions. [2022-11-20 20:21:15,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 20:21:15,981 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 594 transitions. [2022-11-20 20:21:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 20:21:15,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:15,991 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] [2022-11-20 20:21:15,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:21:15,992 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:15,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:15,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1118233714, now seen corresponding path program 1 times [2022-11-20 20:21:15,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:21:15,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371161304] [2022-11-20 20:21:15,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:15,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:21:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:16,298 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 20:21:16,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:21:16,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371161304] [2022-11-20 20:21:16,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371161304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:21:16,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:21:16,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:21:16,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299189900] [2022-11-20 20:21:16,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:21:16,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:21:16,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:21:16,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:21:16,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:21:16,306 INFO L87 Difference]: Start difference. First operand 455 states and 594 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-20 20:21:17,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:17,318 INFO L93 Difference]: Finished difference Result 971 states and 1210 transitions. [2022-11-20 20:21:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 20:21:17,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-20 20:21:17,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:17,325 INFO L225 Difference]: With dead ends: 971 [2022-11-20 20:21:17,325 INFO L226 Difference]: Without dead ends: 669 [2022-11-20 20:21:17,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:21:17,342 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 451 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:17,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 809 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:21:17,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-11-20 20:21:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 634. [2022-11-20 20:21:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 458 states have (on average 1.3100436681222707) internal successors, (600), 465 states have internal predecessors, (600), 100 states have call successors, (100), 68 states have call predecessors, (100), 74 states have return successors, (104), 102 states have call predecessors, (104), 96 states have call successors, (104) [2022-11-20 20:21:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 804 transitions. [2022-11-20 20:21:17,424 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 804 transitions. Word has length 46 [2022-11-20 20:21:17,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:17,425 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 804 transitions. [2022-11-20 20:21:17,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-20 20:21:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 804 transitions. [2022-11-20 20:21:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 20:21:17,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:17,430 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] [2022-11-20 20:21:17,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:21:17,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:17,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:17,432 INFO L85 PathProgramCache]: Analyzing trace with hash 377291076, now seen corresponding path program 1 times [2022-11-20 20:21:17,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:21:17,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480684253] [2022-11-20 20:21:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:17,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:21:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:17,531 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 20:21:17,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:21:17,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480684253] [2022-11-20 20:21:17,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480684253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:21:17,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:21:17,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:21:17,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663538333] [2022-11-20 20:21:17,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:21:17,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:21:17,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:21:17,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:21:17,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:21:17,537 INFO L87 Difference]: Start difference. First operand 634 states and 804 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 20:21:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:17,754 INFO L93 Difference]: Finished difference Result 1198 states and 1474 transitions. [2022-11-20 20:21:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:21:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-20 20:21:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:17,762 INFO L225 Difference]: With dead ends: 1198 [2022-11-20 20:21:17,762 INFO L226 Difference]: Without dead ends: 766 [2022-11-20 20:21:17,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:21:17,770 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 67 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:17,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 514 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:21:17,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-11-20 20:21:17,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 661. [2022-11-20 20:21:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 481 states have (on average 1.2993762993762994) internal successors, (625), 488 states have internal predecessors, (625), 102 states have call successors, (102), 70 states have call predecessors, (102), 76 states have return successors, (106), 104 states have call predecessors, (106), 98 states have call successors, (106) [2022-11-20 20:21:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 833 transitions. [2022-11-20 20:21:17,879 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 833 transitions. Word has length 47 [2022-11-20 20:21:17,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:17,882 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 833 transitions. [2022-11-20 20:21:17,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 20:21:17,883 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 833 transitions. [2022-11-20 20:21:17,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 20:21:17,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:17,887 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] [2022-11-20 20:21:17,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 20:21:17,892 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:17,893 INFO L85 PathProgramCache]: Analyzing trace with hash 871306284, now seen corresponding path program 1 times [2022-11-20 20:21:17,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:21:17,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64007267] [2022-11-20 20:21:17,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:17,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:21:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:17,983 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 20:21:17,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:21:17,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64007267] [2022-11-20 20:21:17,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64007267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:21:17,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:21:17,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:21:17,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153129298] [2022-11-20 20:21:17,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:21:17,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:21:17,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:21:17,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:21:17,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:21:17,987 INFO L87 Difference]: Start difference. First operand 661 states and 833 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 20:21:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:18,187 INFO L93 Difference]: Finished difference Result 851 states and 1054 transitions. [2022-11-20 20:21:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:21:18,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-20 20:21:18,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:18,192 INFO L225 Difference]: With dead ends: 851 [2022-11-20 20:21:18,192 INFO L226 Difference]: Without dead ends: 578 [2022-11-20 20:21:18,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:21:18,200 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 282 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:18,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 335 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:21:18,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-11-20 20:21:18,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 469. [2022-11-20 20:21:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 341 states have (on average 1.2991202346041055) internal successors, (443), 346 states have internal predecessors, (443), 78 states have call successors, (78), 50 states have call predecessors, (78), 48 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-20 20:21:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 595 transitions. [2022-11-20 20:21:18,281 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 595 transitions. Word has length 53 [2022-11-20 20:21:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:18,282 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 595 transitions. [2022-11-20 20:21:18,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 20:21:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 595 transitions. [2022-11-20 20:21:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 20:21:18,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:18,285 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] [2022-11-20 20:21:18,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 20:21:18,286 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:18,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:18,287 INFO L85 PathProgramCache]: Analyzing trace with hash -647770964, now seen corresponding path program 1 times [2022-11-20 20:21:18,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:21:18,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096682753] [2022-11-20 20:21:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:18,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:21:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:18,403 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 20:21:18,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:21:18,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096682753] [2022-11-20 20:21:18,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096682753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:21:18,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:21:18,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:21:18,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983936073] [2022-11-20 20:21:18,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:21:18,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:21:18,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:21:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:21:18,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:21:18,407 INFO L87 Difference]: Start difference. First operand 469 states and 595 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-20 20:21:18,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:18,770 INFO L93 Difference]: Finished difference Result 572 states and 711 transitions. [2022-11-20 20:21:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:21:18,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-20 20:21:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:18,774 INFO L225 Difference]: With dead ends: 572 [2022-11-20 20:21:18,774 INFO L226 Difference]: Without dead ends: 569 [2022-11-20 20:21:18,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:21:18,776 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 513 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:18,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 311 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:21:18,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-11-20 20:21:18,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 468. [2022-11-20 20:21:18,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 341 states have (on average 1.2903225806451613) internal successors, (440), 345 states have internal predecessors, (440), 77 states have call successors, (77), 50 states have call predecessors, (77), 48 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-20 20:21:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 591 transitions. [2022-11-20 20:21:18,836 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 591 transitions. Word has length 54 [2022-11-20 20:21:18,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:18,837 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 591 transitions. [2022-11-20 20:21:18,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-20 20:21:18,838 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 591 transitions. [2022-11-20 20:21:18,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 20:21:18,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:18,839 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] [2022-11-20 20:21:18,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 20:21:18,840 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:18,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1392768557, now seen corresponding path program 1 times [2022-11-20 20:21:18,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:21:18,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807587873] [2022-11-20 20:21:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:18,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:21:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:21:18,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:21:18,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807587873] [2022-11-20 20:21:18,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807587873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:21:18,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328182586] [2022-11-20 20:21:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:18,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:18,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:21:19,003 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:21:19,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:21:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:19,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:21:19,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:21:19,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:21:19,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328182586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:19,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694850488] [2022-11-20 20:21:19,913 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-20 20:21:19,914 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:21:19,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:21:19,925 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:21:19,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:21:28,670 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 165 for LOIs [2022-11-20 20:21:28,709 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 133 for LOIs [2022-11-20 20:21:28,727 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 161 for LOIs [2022-11-20 20:21:28,763 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 169 for LOIs [2022-11-20 20:21:29,562 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 165 for LOIs [2022-11-20 20:21:29,680 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 165 for LOIs [2022-11-20 20:21:29,775 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 165 for LOIs [2022-11-20 20:21:29,824 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 172 for LOIs [2022-11-20 20:21:29,865 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:22:03,144 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11880#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-20 20:22:03,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:22:03,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:22:03,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-20 20:22:03,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13659598] [2022-11-20 20:22:03,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:22:03,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:22:03,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:22:03,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 20:22:03,148 INFO L87 Difference]: Start difference. First operand 468 states and 591 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-20 20:22:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:03,957 INFO L93 Difference]: Finished difference Result 1041 states and 1246 transitions. [2022-11-20 20:22:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:22:03,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-11-20 20:22:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:03,965 INFO L225 Difference]: With dead ends: 1041 [2022-11-20 20:22:03,966 INFO L226 Difference]: Without dead ends: 1038 [2022-11-20 20:22:03,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 20:22:03,968 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 497 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:03,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 1232 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:22:03,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-11-20 20:22:04,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 763. [2022-11-20 20:22:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 546 states have (on average 1.250915750915751) internal successors, (683), 550 states have internal predecessors, (683), 125 states have call successors, (125), 92 states have call predecessors, (125), 90 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2022-11-20 20:22:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 930 transitions. [2022-11-20 20:22:04,077 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 930 transitions. Word has length 55 [2022-11-20 20:22:04,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:04,078 INFO L495 AbstractCegarLoop]: Abstraction has 763 states and 930 transitions. [2022-11-20 20:22:04,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-20 20:22:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 930 transitions. [2022-11-20 20:22:04,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 20:22:04,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:04,080 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] [2022-11-20 20:22:04,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:04,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:04,288 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:04,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:04,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1225842540, now seen corresponding path program 2 times [2022-11-20 20:22:04,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:04,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474371183] [2022-11-20 20:22:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:04,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:04,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:04,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474371183] [2022-11-20 20:22:04,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474371183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:04,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:04,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:22:04,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327377302] [2022-11-20 20:22:04,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:04,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:04,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:04,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:04,337 INFO L87 Difference]: Start difference. First operand 763 states and 930 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-20 20:22:04,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:04,555 INFO L93 Difference]: Finished difference Result 1176 states and 1403 transitions. [2022-11-20 20:22:04,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:04,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2022-11-20 20:22:04,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:04,560 INFO L225 Difference]: With dead ends: 1176 [2022-11-20 20:22:04,560 INFO L226 Difference]: Without dead ends: 765 [2022-11-20 20:22:04,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:04,564 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 285 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:04,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 368 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:22:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-11-20 20:22:04,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 759. [2022-11-20 20:22:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 542 states have (on average 1.2380073800738007) internal successors, (671), 546 states have internal predecessors, (671), 125 states have call successors, (125), 92 states have call predecessors, (125), 90 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2022-11-20 20:22:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 918 transitions. [2022-11-20 20:22:04,675 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 918 transitions. Word has length 58 [2022-11-20 20:22:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:04,675 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 918 transitions. [2022-11-20 20:22:04,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-20 20:22:04,676 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 918 transitions. [2022-11-20 20:22:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 20:22:04,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:04,677 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] [2022-11-20 20:22:04,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:22:04,678 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1811806047, now seen corresponding path program 1 times [2022-11-20 20:22:04,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:04,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882138785] [2022-11-20 20:22:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:04,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:04,819 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 20:22:04,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:04,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882138785] [2022-11-20 20:22:04,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882138785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:04,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:04,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:22:04,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348729698] [2022-11-20 20:22:04,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:04,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:22:04,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:22:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:22:04,822 INFO L87 Difference]: Start difference. First operand 759 states and 918 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 20:22:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:05,917 INFO L93 Difference]: Finished difference Result 1427 states and 2005 transitions. [2022-11-20 20:22:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:22:05,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2022-11-20 20:22:05,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:05,927 INFO L225 Difference]: With dead ends: 1427 [2022-11-20 20:22:05,928 INFO L226 Difference]: Without dead ends: 1285 [2022-11-20 20:22:05,929 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 20:22:05,932 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 1083 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:05,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 1127 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:22:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-11-20 20:22:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1272. [2022-11-20 20:22:06,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 962 states have (on average 1.3544698544698546) internal successors, (1303), 969 states have internal predecessors, (1303), 194 states have call successors, (194), 116 states have call predecessors, (194), 114 states have return successors, (237), 188 states have call predecessors, (237), 191 states have call successors, (237) [2022-11-20 20:22:06,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1734 transitions. [2022-11-20 20:22:06,086 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1734 transitions. Word has length 56 [2022-11-20 20:22:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:06,087 INFO L495 AbstractCegarLoop]: Abstraction has 1272 states and 1734 transitions. [2022-11-20 20:22:06,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 20:22:06,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1734 transitions. [2022-11-20 20:22:06,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 20:22:06,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:06,089 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 20:22:06,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 20:22:06,090 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:06,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:06,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1279350032, now seen corresponding path program 1 times [2022-11-20 20:22:06,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:06,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809140254] [2022-11-20 20:22:06,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:06,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:22:06,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:06,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809140254] [2022-11-20 20:22:06,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809140254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:06,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:06,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:22:06,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836946823] [2022-11-20 20:22:06,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:06,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:06,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:06,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:06,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:06,145 INFO L87 Difference]: Start difference. First operand 1272 states and 1734 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 20:22:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:06,429 INFO L93 Difference]: Finished difference Result 1891 states and 2444 transitions. [2022-11-20 20:22:06,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:06,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-20 20:22:06,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:06,442 INFO L225 Difference]: With dead ends: 1891 [2022-11-20 20:22:06,442 INFO L226 Difference]: Without dead ends: 1528 [2022-11-20 20:22:06,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:06,444 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 42 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:06,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 550 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:22:06,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2022-11-20 20:22:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1347. [2022-11-20 20:22:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1023 states have (on average 1.3470185728250244) internal successors, (1378), 1030 states have internal predecessors, (1378), 201 states have call successors, (201), 123 states have call predecessors, (201), 121 states have return successors, (244), 195 states have call predecessors, (244), 198 states have call successors, (244) [2022-11-20 20:22:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 1823 transitions. [2022-11-20 20:22:06,635 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 1823 transitions. Word has length 61 [2022-11-20 20:22:06,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:06,636 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 1823 transitions. [2022-11-20 20:22:06,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 20:22:06,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 1823 transitions. [2022-11-20 20:22:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 20:22:06,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:06,645 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-20 20:22:06,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 20:22:06,645 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:06,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:06,646 INFO L85 PathProgramCache]: Analyzing trace with hash -983373549, now seen corresponding path program 1 times [2022-11-20 20:22:06,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:06,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151012896] [2022-11-20 20:22:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:06,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:22:06,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:06,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151012896] [2022-11-20 20:22:06,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151012896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:06,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:06,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:22:06,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945481076] [2022-11-20 20:22:06,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:06,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:22:06,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:06,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:22:06,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:22:06,824 INFO L87 Difference]: Start difference. First operand 1347 states and 1823 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 20:22:07,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:07,892 INFO L93 Difference]: Finished difference Result 2396 states and 3006 transitions. [2022-11-20 20:22:07,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 20:22:07,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2022-11-20 20:22:07,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:07,903 INFO L225 Difference]: With dead ends: 2396 [2022-11-20 20:22:07,903 INFO L226 Difference]: Without dead ends: 1715 [2022-11-20 20:22:07,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:22:07,907 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 433 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:07,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 918 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:22:07,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-11-20 20:22:08,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1666. [2022-11-20 20:22:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1237 states have (on average 1.3047696038803558) internal successors, (1614), 1244 states have internal predecessors, (1614), 257 states have call successors, (257), 172 states have call predecessors, (257), 170 states have return successors, (300), 251 states have call predecessors, (300), 254 states have call successors, (300) [2022-11-20 20:22:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2171 transitions. [2022-11-20 20:22:08,199 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2171 transitions. Word has length 70 [2022-11-20 20:22:08,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:08,200 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2171 transitions. [2022-11-20 20:22:08,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 20:22:08,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2171 transitions. [2022-11-20 20:22:08,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 20:22:08,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:08,203 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] [2022-11-20 20:22:08,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 20:22:08,203 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:08,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash -462296564, now seen corresponding path program 1 times [2022-11-20 20:22:08,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:08,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543753055] [2022-11-20 20:22:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:08,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:22:08,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:08,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543753055] [2022-11-20 20:22:08,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543753055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:08,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:08,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:22:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254040294] [2022-11-20 20:22:08,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:08,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:08,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:08,263 INFO L87 Difference]: Start difference. First operand 1666 states and 2171 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 20:22:08,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:08,626 INFO L93 Difference]: Finished difference Result 2632 states and 3265 transitions. [2022-11-20 20:22:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:08,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-20 20:22:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:08,637 INFO L225 Difference]: With dead ends: 2632 [2022-11-20 20:22:08,637 INFO L226 Difference]: Without dead ends: 1842 [2022-11-20 20:22:08,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:08,641 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 37 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:08,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 544 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:22:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2022-11-20 20:22:08,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1713. [2022-11-20 20:22:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1276 states have (on average 1.3009404388714734) internal successors, (1660), 1283 states have internal predecessors, (1660), 261 states have call successors, (261), 176 states have call predecessors, (261), 174 states have return successors, (304), 255 states have call predecessors, (304), 258 states have call successors, (304) [2022-11-20 20:22:08,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 2225 transitions. [2022-11-20 20:22:08,913 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 2225 transitions. Word has length 71 [2022-11-20 20:22:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:08,914 INFO L495 AbstractCegarLoop]: Abstraction has 1713 states and 2225 transitions. [2022-11-20 20:22:08,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 20:22:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 2225 transitions. [2022-11-20 20:22:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 20:22:08,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:08,917 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:22:08,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 20:22:08,918 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:08,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:08,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1326549782, now seen corresponding path program 1 times [2022-11-20 20:22:08,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:08,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308417102] [2022-11-20 20:22:08,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:08,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 20:22:09,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:09,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308417102] [2022-11-20 20:22:09,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308417102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:22:09,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687583966] [2022-11-20 20:22:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:09,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:09,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:09,329 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:09,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:22:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:09,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:22:09,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:22:09,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:09,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687583966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:09,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:22:09,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-20 20:22:09,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854551581] [2022-11-20 20:22:09,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:09,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:22:09,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:09,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:22:09,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-20 20:22:09,601 INFO L87 Difference]: Start difference. First operand 1713 states and 2225 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 20:22:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:10,148 INFO L93 Difference]: Finished difference Result 2577 states and 3230 transitions. [2022-11-20 20:22:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:22:10,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-20 20:22:10,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:10,157 INFO L225 Difference]: With dead ends: 2577 [2022-11-20 20:22:10,157 INFO L226 Difference]: Without dead ends: 1530 [2022-11-20 20:22:10,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:22:10,161 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 280 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:10,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 1139 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:22:10,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-11-20 20:22:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1345. [2022-11-20 20:22:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1039 states have (on average 1.3378248315688162) internal successors, (1390), 1046 states have internal predecessors, (1390), 190 states have call successors, (190), 116 states have call predecessors, (190), 114 states have return successors, (233), 184 states have call predecessors, (233), 187 states have call successors, (233) [2022-11-20 20:22:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1813 transitions. [2022-11-20 20:22:10,408 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1813 transitions. Word has length 102 [2022-11-20 20:22:10,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:10,409 INFO L495 AbstractCegarLoop]: Abstraction has 1345 states and 1813 transitions. [2022-11-20 20:22:10,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 20:22:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1813 transitions. [2022-11-20 20:22:10,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-20 20:22:10,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:10,412 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:22:10,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:10,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 20:22:10,618 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:10,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1978668510, now seen corresponding path program 1 times [2022-11-20 20:22:10,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:10,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402548172] [2022-11-20 20:22:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:10,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 20:22:10,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:10,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402548172] [2022-11-20 20:22:10,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402548172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:22:10,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286394958] [2022-11-20 20:22:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:10,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:10,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:10,873 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:10,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:22:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:22:11,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:22:11,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:11,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286394958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:11,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:22:11,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-20 20:22:11,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702437137] [2022-11-20 20:22:11,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:11,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:22:11,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:22:11,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:22:11,167 INFO L87 Difference]: Start difference. First operand 1345 states and 1813 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 20:22:11,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:11,691 INFO L93 Difference]: Finished difference Result 1894 states and 2438 transitions. [2022-11-20 20:22:11,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:22:11,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-20 20:22:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:11,702 INFO L225 Difference]: With dead ends: 1894 [2022-11-20 20:22:11,702 INFO L226 Difference]: Without dead ends: 1301 [2022-11-20 20:22:11,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-20 20:22:11,705 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 71 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:11,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1451 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:22:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2022-11-20 20:22:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1209. [2022-11-20 20:22:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 939 states have (on average 1.3556975505857296) internal successors, (1273), 946 states have internal predecessors, (1273), 171 states have call successors, (171), 99 states have call predecessors, (171), 97 states have return successors, (214), 165 states have call predecessors, (214), 168 states have call successors, (214) [2022-11-20 20:22:11,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1658 transitions. [2022-11-20 20:22:11,913 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1658 transitions. Word has length 112 [2022-11-20 20:22:11,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:11,913 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 1658 transitions. [2022-11-20 20:22:11,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 20:22:11,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1658 transitions. [2022-11-20 20:22:11,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 20:22:11,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:11,921 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:22:11,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:12,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 20:22:12,127 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:12,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:12,128 INFO L85 PathProgramCache]: Analyzing trace with hash -35244330, now seen corresponding path program 1 times [2022-11-20 20:22:12,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:12,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286845463] [2022-11-20 20:22:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:12,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 20:22:12,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:12,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286845463] [2022-11-20 20:22:12,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286845463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:22:12,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71372556] [2022-11-20 20:22:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:12,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:12,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:12,334 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:12,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:22:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:12,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:22:12,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 20:22:12,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:12,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71372556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:12,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:22:12,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-20 20:22:12,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505523348] [2022-11-20 20:22:12,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:12,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:22:12,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:22:12,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:22:12,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:22:12,594 INFO L87 Difference]: Start difference. First operand 1209 states and 1658 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:22:13,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:13,070 INFO L93 Difference]: Finished difference Result 1958 states and 2503 transitions. [2022-11-20 20:22:13,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:22:13,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-20 20:22:13,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:13,080 INFO L225 Difference]: With dead ends: 1958 [2022-11-20 20:22:13,080 INFO L226 Difference]: Without dead ends: 1501 [2022-11-20 20:22:13,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:22:13,083 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 265 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:13,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 1222 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:22:13,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-20 20:22:13,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1467. [2022-11-20 20:22:13,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1101 states have (on average 1.3197093551316985) internal successors, (1453), 1114 states have internal predecessors, (1453), 219 states have call successors, (219), 141 states have call predecessors, (219), 145 states have return successors, (274), 213 states have call predecessors, (274), 216 states have call successors, (274) [2022-11-20 20:22:13,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 1946 transitions. [2022-11-20 20:22:13,356 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 1946 transitions. Word has length 113 [2022-11-20 20:22:13,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:13,356 INFO L495 AbstractCegarLoop]: Abstraction has 1467 states and 1946 transitions. [2022-11-20 20:22:13,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:22:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 1946 transitions. [2022-11-20 20:22:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-20 20:22:13,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:13,364 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:22:13,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:13,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 20:22:13,571 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:13,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:13,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1194020130, now seen corresponding path program 1 times [2022-11-20 20:22:13,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:22:13,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952823457] [2022-11-20 20:22:13,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:13,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:22:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 20:22:14,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:22:14,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952823457] [2022-11-20 20:22:14,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952823457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:22:14,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324509326] [2022-11-20 20:22:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:14,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:14,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:14,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:14,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:22:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:14,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-20 20:22:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:22:15,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 20:22:18,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324509326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:18,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [523896053] [2022-11-20 20:22:18,077 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-20 20:22:18,077 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:22:18,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:22:18,078 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:22:18,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:23:17,960 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 304 for LOIs [2022-11-20 20:23:19,020 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 256 for LOIs [2022-11-20 20:23:19,124 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 249 for LOIs [2022-11-20 20:23:19,228 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 316 for LOIs [2022-11-20 20:23:22,385 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 184 for LOIs [2022-11-20 20:23:22,843 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 133 for LOIs [2022-11-20 20:23:23,256 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 308 for LOIs [2022-11-20 20:23:24,022 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 331 for LOIs [2022-11-20 20:23:24,804 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:24:47,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55049#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~t7_i~0 0) (<= ~q_buf_0~0 2147483647) (= 0 ~t8_pc~0) (<= ~p_dw_pc~0 1) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (= 0 ~t4_st~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (= ~T5_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (= ~E_3~0 2) (<= ~t7_pc~0 0) (<= ~t1_pc~0 0) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= 1 ~c_dr_st~0) (<= ~local~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= 0 (+ ~q_buf_0~0 2147483648)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~t3_i~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= ~p_last_write~0 2147483647) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= ~t7_st~0 0) (<= ~E_8~0 2) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-20 20:24:47,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:24:47,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:24:47,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-20 20:24:47,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017523168] [2022-11-20 20:24:47,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:24:47,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 20:24:47,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:24:47,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 20:24:47,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=10149, Unknown=0, NotChecked=0, Total=10920 [2022-11-20 20:24:47,277 INFO L87 Difference]: Start difference. First operand 1467 states and 1946 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-20 20:25:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:11,592 INFO L93 Difference]: Finished difference Result 3757 states and 4600 transitions. [2022-11-20 20:25:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-20 20:25:11,593 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-20 20:25:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:11,606 INFO L225 Difference]: With dead ends: 3757 [2022-11-20 20:25:11,606 INFO L226 Difference]: Without dead ends: 3042 [2022-11-20 20:25:11,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 288 SyntacticMatches, 6 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40846 ImplicationChecksByTransitivity, 100.8s TimeCoverageRelationStatistics Valid=9166, Invalid=89744, Unknown=0, NotChecked=0, Total=98910 [2022-11-20 20:25:11,627 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 4258 mSDsluCounter, 3437 mSDsCounter, 0 mSdLazyCounter, 8273 mSolverCounterSat, 1993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 3667 SdHoareTripleChecker+Invalid, 10266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1993 IncrementalHoareTripleChecker+Valid, 8273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:11,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4260 Valid, 3667 Invalid, 10266 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1993 Valid, 8273 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-20 20:25:11,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2022-11-20 20:25:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1743. [2022-11-20 20:25:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1285 states have (on average 1.2949416342412452) internal successors, (1664), 1300 states have internal predecessors, (1664), 264 states have call successors, (264), 178 states have call predecessors, (264), 192 states have return successors, (331), 266 states have call predecessors, (331), 261 states have call successors, (331) [2022-11-20 20:25:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 2259 transitions. [2022-11-20 20:25:12,054 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 2259 transitions. Word has length 114 [2022-11-20 20:25:12,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:12,054 INFO L495 AbstractCegarLoop]: Abstraction has 1743 states and 2259 transitions. [2022-11-20 20:25:12,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-20 20:25:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 2259 transitions. [2022-11-20 20:25:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-20 20:25:12,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:12,059 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:25:12,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:12,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 20:25:12,265 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:12,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:12,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1348825369, now seen corresponding path program 1 times [2022-11-20 20:25:12,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:12,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708844367] [2022-11-20 20:25:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:12,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:25:12,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:12,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708844367] [2022-11-20 20:25:12,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708844367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:12,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942075403] [2022-11-20 20:25:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:12,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:12,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:12,772 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:12,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:25:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:12,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 20:25:12,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 20:25:13,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:25:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 20:25:13,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942075403] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:13,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:25:13,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-20 20:25:13,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855038008] [2022-11-20 20:25:13,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:13,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:25:13,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:13,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:25:13,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:25:13,346 INFO L87 Difference]: Start difference. First operand 1743 states and 2259 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 20:25:14,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:14,484 INFO L93 Difference]: Finished difference Result 3067 states and 3807 transitions. [2022-11-20 20:25:14,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:25:14,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-20 20:25:14,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:14,496 INFO L225 Difference]: With dead ends: 3067 [2022-11-20 20:25:14,496 INFO L226 Difference]: Without dead ends: 2076 [2022-11-20 20:25:14,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-20 20:25:14,500 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 444 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:14,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 531 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:25:14,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2022-11-20 20:25:14,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1823. [2022-11-20 20:25:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1330 states have (on average 1.2894736842105263) internal successors, (1715), 1348 states have internal predecessors, (1715), 283 states have call successors, (283), 187 states have call predecessors, (283), 208 states have return successors, (371), 289 states have call predecessors, (371), 280 states have call successors, (371) [2022-11-20 20:25:14,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2369 transitions. [2022-11-20 20:25:14,937 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2369 transitions. Word has length 115 [2022-11-20 20:25:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:14,937 INFO L495 AbstractCegarLoop]: Abstraction has 1823 states and 2369 transitions. [2022-11-20 20:25:14,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 20:25:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2369 transitions. [2022-11-20 20:25:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 20:25:14,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:14,943 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 20:25:14,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:15,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 20:25:15,150 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:15,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1267765248, now seen corresponding path program 1 times [2022-11-20 20:25:15,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:15,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395500312] [2022-11-20 20:25:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:15,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 20:25:15,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:15,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395500312] [2022-11-20 20:25:15,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395500312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:15,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927329495] [2022-11-20 20:25:15,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:15,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:15,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:15,309 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:15,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:25:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:15,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:25:15,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 20:25:15,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:25:15,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927329495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:15,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:25:15,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 20:25:15,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663752794] [2022-11-20 20:25:15,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:15,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:15,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:15,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:15,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:15,613 INFO L87 Difference]: Start difference. First operand 1823 states and 2369 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 20:25:16,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:16,225 INFO L93 Difference]: Finished difference Result 3117 states and 4493 transitions. [2022-11-20 20:25:16,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:25:16,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-20 20:25:16,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:16,237 INFO L225 Difference]: With dead ends: 3117 [2022-11-20 20:25:16,237 INFO L226 Difference]: Without dead ends: 2462 [2022-11-20 20:25:16,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:16,242 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 281 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:16,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:25:16,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2022-11-20 20:25:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2453. [2022-11-20 20:25:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 1848 states have (on average 1.3474025974025974) internal successors, (2490), 1869 states have internal predecessors, (2490), 365 states have call successors, (365), 217 states have call predecessors, (365), 238 states have return successors, (495), 368 states have call predecessors, (495), 362 states have call successors, (495) [2022-11-20 20:25:16,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3350 transitions. [2022-11-20 20:25:16,679 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3350 transitions. Word has length 109 [2022-11-20 20:25:16,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:16,680 INFO L495 AbstractCegarLoop]: Abstraction has 2453 states and 3350 transitions. [2022-11-20 20:25:16,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 20:25:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3350 transitions. [2022-11-20 20:25:16,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 20:25:16,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:16,685 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 20:25:16,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:16,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 20:25:16,893 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:16,893 INFO L85 PathProgramCache]: Analyzing trace with hash 365418080, now seen corresponding path program 1 times [2022-11-20 20:25:16,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:16,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339810163] [2022-11-20 20:25:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:16,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 20:25:17,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:17,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339810163] [2022-11-20 20:25:17,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339810163] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:17,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133569288] [2022-11-20 20:25:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:17,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:17,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:17,035 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:17,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 20:25:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:17,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:25:17,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:25:17,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:25:17,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133569288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:17,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:25:17,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 20:25:17,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694726555] [2022-11-20 20:25:17,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:17,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:17,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:17,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:17,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:17,355 INFO L87 Difference]: Start difference. First operand 2453 states and 3350 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 20:25:18,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:18,201 INFO L93 Difference]: Finished difference Result 4992 states and 7492 transitions. [2022-11-20 20:25:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:25:18,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-20 20:25:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:18,221 INFO L225 Difference]: With dead ends: 4992 [2022-11-20 20:25:18,221 INFO L226 Difference]: Without dead ends: 3707 [2022-11-20 20:25:18,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:18,230 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 278 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:18,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:25:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2022-11-20 20:25:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 3693. [2022-11-20 20:25:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3693 states, 2869 states have (on average 1.397699546880446) internal successors, (4010), 2896 states have internal predecessors, (4010), 524 states have call successors, (524), 277 states have call predecessors, (524), 298 states have return successors, (734), 521 states have call predecessors, (734), 521 states have call successors, (734) [2022-11-20 20:25:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3693 states to 3693 states and 5268 transitions. [2022-11-20 20:25:18,977 INFO L78 Accepts]: Start accepts. Automaton has 3693 states and 5268 transitions. Word has length 109 [2022-11-20 20:25:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:18,978 INFO L495 AbstractCegarLoop]: Abstraction has 3693 states and 5268 transitions. [2022-11-20 20:25:18,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 20:25:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3693 states and 5268 transitions. [2022-11-20 20:25:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 20:25:18,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:18,986 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 20:25:18,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:19,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:19,193 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:19,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:19,194 INFO L85 PathProgramCache]: Analyzing trace with hash 802163712, now seen corresponding path program 1 times [2022-11-20 20:25:19,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:19,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436987448] [2022-11-20 20:25:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:19,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 20:25:19,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:19,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436987448] [2022-11-20 20:25:19,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436987448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:19,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528995334] [2022-11-20 20:25:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:19,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:19,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:19,325 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:19,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 20:25:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:19,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:25:19,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:25:19,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:25:19,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528995334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:19,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:25:19,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 20:25:19,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121745201] [2022-11-20 20:25:19,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:19,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:19,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:19,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:19,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:19,622 INFO L87 Difference]: Start difference. First operand 3693 states and 5268 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 20:25:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:20,731 INFO L93 Difference]: Finished difference Result 8682 states and 13349 transitions. [2022-11-20 20:25:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:25:20,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-20 20:25:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:20,764 INFO L225 Difference]: With dead ends: 8682 [2022-11-20 20:25:20,764 INFO L226 Difference]: Without dead ends: 6157 [2022-11-20 20:25:20,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:20,780 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 266 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:20,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:25:20,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6157 states. [2022-11-20 20:25:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6157 to 6133. [2022-11-20 20:25:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6133 states, 4881 states have (on average 1.4320835894283959) internal successors, (6990), 4920 states have internal predecessors, (6990), 832 states have call successors, (832), 397 states have call predecessors, (832), 418 states have return successors, (1194), 817 states have call predecessors, (1194), 829 states have call successors, (1194) [2022-11-20 20:25:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6133 states to 6133 states and 9016 transitions. [2022-11-20 20:25:21,849 INFO L78 Accepts]: Start accepts. Automaton has 6133 states and 9016 transitions. Word has length 109 [2022-11-20 20:25:21,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:21,850 INFO L495 AbstractCegarLoop]: Abstraction has 6133 states and 9016 transitions. [2022-11-20 20:25:21,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 20:25:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 6133 states and 9016 transitions. [2022-11-20 20:25:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 20:25:21,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:21,864 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 20:25:21,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:22,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:22,070 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:22,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:22,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1497608608, now seen corresponding path program 1 times [2022-11-20 20:25:22,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:22,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353484290] [2022-11-20 20:25:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:22,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 20:25:22,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:22,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353484290] [2022-11-20 20:25:22,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353484290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:22,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649131721] [2022-11-20 20:25:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:22,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:22,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:22,234 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:22,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 20:25:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:22,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:25:22,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 20:25:22,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:25:22,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649131721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:22,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:25:22,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 20:25:22,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249368575] [2022-11-20 20:25:22,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:22,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:22,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:22,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:22,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:22,530 INFO L87 Difference]: Start difference. First operand 6133 states and 9016 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 20:25:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:24,108 INFO L93 Difference]: Finished difference Result 15942 states and 24781 transitions. [2022-11-20 20:25:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:25:24,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-20 20:25:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:24,160 INFO L225 Difference]: With dead ends: 15942 [2022-11-20 20:25:24,160 INFO L226 Difference]: Without dead ends: 10977 [2022-11-20 20:25:24,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:24,186 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 272 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:24,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:25:24,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10977 states. [2022-11-20 20:25:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10977 to 10933. [2022-11-20 20:25:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10933 states, 8845 states have (on average 1.4505370265686828) internal successors, (12830), 8908 states have internal predecessors, (12830), 1428 states have call successors, (1428), 637 states have call predecessors, (1428), 658 states have return successors, (2078), 1389 states have call predecessors, (2078), 1425 states have call successors, (2078) [2022-11-20 20:25:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10933 states to 10933 states and 16336 transitions. [2022-11-20 20:25:25,773 INFO L78 Accepts]: Start accepts. Automaton has 10933 states and 16336 transitions. Word has length 109 [2022-11-20 20:25:25,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:25,773 INFO L495 AbstractCegarLoop]: Abstraction has 10933 states and 16336 transitions. [2022-11-20 20:25:25,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 20:25:25,774 INFO L276 IsEmpty]: Start isEmpty. Operand 10933 states and 16336 transitions. [2022-11-20 20:25:25,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 20:25:25,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:25,789 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 20:25:25,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:25,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:25,996 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:25,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:25,996 INFO L85 PathProgramCache]: Analyzing trace with hash -728981696, now seen corresponding path program 1 times [2022-11-20 20:25:25,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:25,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276886227] [2022-11-20 20:25:25,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:25,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 20:25:26,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:26,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276886227] [2022-11-20 20:25:26,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276886227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:26,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:25:26,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:25:26,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247806875] [2022-11-20 20:25:26,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:26,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:26,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:26,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:26,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:25:26,096 INFO L87 Difference]: Start difference. First operand 10933 states and 16336 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 20:25:28,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:28,598 INFO L93 Difference]: Finished difference Result 20985 states and 32499 transitions. [2022-11-20 20:25:28,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:25:28,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 109 [2022-11-20 20:25:28,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:28,668 INFO L225 Difference]: With dead ends: 20985 [2022-11-20 20:25:28,668 INFO L226 Difference]: Without dead ends: 13141 [2022-11-20 20:25:28,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:25:28,701 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 92 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:28,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 615 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:25:28,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13141 states. [2022-11-20 20:25:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13141 to 12357. [2022-11-20 20:25:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12357 states, 10205 states have (on average 1.487702106810387) internal successors, (15182), 10268 states have internal predecessors, (15182), 1460 states have call successors, (1460), 669 states have call predecessors, (1460), 690 states have return successors, (2110), 1421 states have call predecessors, (2110), 1457 states have call successors, (2110) [2022-11-20 20:25:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12357 states to 12357 states and 18752 transitions. [2022-11-20 20:25:30,498 INFO L78 Accepts]: Start accepts. Automaton has 12357 states and 18752 transitions. Word has length 109 [2022-11-20 20:25:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:30,498 INFO L495 AbstractCegarLoop]: Abstraction has 12357 states and 18752 transitions. [2022-11-20 20:25:30,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 20:25:30,499 INFO L276 IsEmpty]: Start isEmpty. Operand 12357 states and 18752 transitions. [2022-11-20 20:25:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 20:25:30,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:30,516 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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] [2022-11-20 20:25:30,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 20:25:30,517 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:30,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1755810669, now seen corresponding path program 1 times [2022-11-20 20:25:30,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:30,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073747222] [2022-11-20 20:25:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:30,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 20:25:31,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:31,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073747222] [2022-11-20 20:25:31,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073747222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:31,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30020913] [2022-11-20 20:25:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:31,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:31,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:31,300 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:31,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 20:25:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:31,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-20 20:25:31,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:25:32,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:25:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:25:34,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30020913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:25:34,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444278655] [2022-11-20 20:25:34,543 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-20 20:25:34,543 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:25:34,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:25:34,544 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:25:34,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:26:06,996 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 239 for LOIs [2022-11-20 20:26:07,089 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 240 for LOIs [2022-11-20 20:26:07,173 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 239 for LOIs [2022-11-20 20:26:07,272 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 239 for LOIs [2022-11-20 20:26:08,242 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 239 for LOIs [2022-11-20 20:26:08,845 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 120 for LOIs [2022-11-20 20:26:09,196 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 243 for LOIs [2022-11-20 20:26:09,285 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2022-11-20 20:26:09,376 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:27:20,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '200600#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-20 20:27:20,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:27:20,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:27:20,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-20 20:27:20,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677025645] [2022-11-20 20:27:20,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:27:20,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 20:27:20,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:27:20,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 20:27:20,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=9127, Unknown=0, NotChecked=0, Total=9900 [2022-11-20 20:27:20,499 INFO L87 Difference]: Start difference. First operand 12357 states and 18752 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-20 20:27:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:27:30,773 INFO L93 Difference]: Finished difference Result 15206 states and 22094 transitions. [2022-11-20 20:27:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-20 20:27:30,773 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-20 20:27:30,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:27:30,829 INFO L225 Difference]: With dead ends: 15206 [2022-11-20 20:27:30,829 INFO L226 Difference]: Without dead ends: 14135 [2022-11-20 20:27:30,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 315 SyntacticMatches, 7 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14312 ImplicationChecksByTransitivity, 76.3s TimeCoverageRelationStatistics Valid=3540, Invalid=29766, Unknown=0, NotChecked=0, Total=33306 [2022-11-20 20:27:30,844 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 4657 mSDsluCounter, 2024 mSDsCounter, 0 mSdLazyCounter, 4714 mSolverCounterSat, 2485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4658 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 7199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2485 IncrementalHoareTripleChecker+Valid, 4714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:27:30,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4658 Valid, 2229 Invalid, 7199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2485 Valid, 4714 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-20 20:27:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14135 states. [2022-11-20 20:27:32,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14135 to 12894. [2022-11-20 20:27:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12894 states, 10591 states have (on average 1.4758757435558494) internal successors, (15631), 10654 states have internal predecessors, (15631), 1534 states have call successors, (1534), 728 states have call predecessors, (1534), 767 states have return successors, (2202), 1513 states have call predecessors, (2202), 1531 states have call successors, (2202) [2022-11-20 20:27:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12894 states to 12894 states and 19367 transitions. [2022-11-20 20:27:32,618 INFO L78 Accepts]: Start accepts. Automaton has 12894 states and 19367 transitions. Word has length 124 [2022-11-20 20:27:32,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:27:32,619 INFO L495 AbstractCegarLoop]: Abstraction has 12894 states and 19367 transitions. [2022-11-20 20:27:32,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-20 20:27:32,619 INFO L276 IsEmpty]: Start isEmpty. Operand 12894 states and 19367 transitions. [2022-11-20 20:27:32,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-20 20:27:32,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:27:32,634 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:32,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 20:27:32,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:27:32,839 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:27:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:27:32,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1032292256, now seen corresponding path program 1 times [2022-11-20 20:27:32,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:27:32,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613131229] [2022-11-20 20:27:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:27:32,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:27:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:27:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 20:27:33,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:27:33,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613131229] [2022-11-20 20:27:33,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613131229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:27:33,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148560888] [2022-11-20 20:27:33,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:27:33,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:27:33,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:27:33,041 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:27:33,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 20:27:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:27:33,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 20:27:33,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:27:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:27:33,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:27:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 20:27:33,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148560888] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 20:27:33,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:27:33,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-20 20:27:33,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759171577] [2022-11-20 20:27:33,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:27:33,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:27:33,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:27:33,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:27:33,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 20:27:33,565 INFO L87 Difference]: Start difference. First operand 12894 states and 19367 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 20:27:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:27:35,988 INFO L93 Difference]: Finished difference Result 13853 states and 20458 transitions. [2022-11-20 20:27:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:27:35,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-20 20:27:35,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:27:36,032 INFO L225 Difference]: With dead ends: 13853 [2022-11-20 20:27:36,032 INFO L226 Difference]: Without dead ends: 12245 [2022-11-20 20:27:36,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-20 20:27:36,046 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 664 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:27:36,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 505 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:27:36,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12245 states. [2022-11-20 20:27:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12245 to 11904. [2022-11-20 20:27:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11904 states, 9894 states have (on average 1.4967657165959167) internal successors, (14809), 9956 states have internal predecessors, (14809), 1384 states have call successors, (1384), 607 states have call predecessors, (1384), 624 states have return successors, (2019), 1342 states have call predecessors, (2019), 1381 states have call successors, (2019) [2022-11-20 20:27:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11904 states to 11904 states and 18212 transitions. [2022-11-20 20:27:37,841 INFO L78 Accepts]: Start accepts. Automaton has 11904 states and 18212 transitions. Word has length 125 [2022-11-20 20:27:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:27:37,842 INFO L495 AbstractCegarLoop]: Abstraction has 11904 states and 18212 transitions. [2022-11-20 20:27:37,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 20:27:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 11904 states and 18212 transitions. [2022-11-20 20:27:37,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-20 20:27:37,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:27:37,860 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 20:27:37,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 20:27:38,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bb051-6455-4b49-aa2a-570e3403d685/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 20:27:38,066 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:27:38,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:27:38,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2100535398, now seen corresponding path program 1 times [2022-11-20 20:27:38,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:27:38,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742162382] [2022-11-20 20:27:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:27:38,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:27:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:27:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-20 20:27:38,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:27:38,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742162382] [2022-11-20 20:27:38,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742162382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:27:38,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:27:38,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:27:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804571008] [2022-11-20 20:27:38,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:27:38,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:27:38,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:27:38,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:27:38,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:27:38,174 INFO L87 Difference]: Start difference. First operand 11904 states and 18212 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-20 20:27:41,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:27:41,024 INFO L93 Difference]: Finished difference Result 33929 states and 53565 transitions. [2022-11-20 20:27:41,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:27:41,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-20 20:27:41,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:27:41,107 INFO L225 Difference]: With dead ends: 33929 [2022-11-20 20:27:41,107 INFO L226 Difference]: Without dead ends: 22740 [2022-11-20 20:27:41,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:27:41,148 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 272 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:27:41,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 447 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:27:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22740 states. [2022-11-20 20:27:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22740 to 22624. [2022-11-20 20:27:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22624 states, 18918 states have (on average 1.4966169785389576) internal successors, (28313), 19028 states have internal predecessors, (28313), 2568 states have call successors, (2568), 1119 states have call predecessors, (2568), 1136 states have return successors, (3747), 2478 states have call predecessors, (3747), 2565 states have call successors, (3747) [2022-11-20 20:27:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22624 states to 22624 states and 34628 transitions. [2022-11-20 20:27:44,358 INFO L78 Accepts]: Start accepts. Automaton has 22624 states and 34628 transitions. Word has length 147 [2022-11-20 20:27:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:27:44,358 INFO L495 AbstractCegarLoop]: Abstraction has 22624 states and 34628 transitions. [2022-11-20 20:27:44,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-20 20:27:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 22624 states and 34628 transitions. [2022-11-20 20:27:44,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-20 20:27:44,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:27:44,390 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 20:27:44,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-20 20:27:44,391 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:27:44,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:27:44,391 INFO L85 PathProgramCache]: Analyzing trace with hash -558126527, now seen corresponding path program 1 times [2022-11-20 20:27:44,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:27:44,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173723754] [2022-11-20 20:27:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:27:44,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:27:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:27:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-20 20:27:44,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:27:44,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173723754] [2022-11-20 20:27:44,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173723754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:27:44,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:27:44,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:27:44,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222651655] [2022-11-20 20:27:44,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:27:44,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:27:44,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:27:44,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:27:44,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:27:44,476 INFO L87 Difference]: Start difference. First operand 22624 states and 34628 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-20 20:27:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:27:49,848 INFO L93 Difference]: Finished difference Result 65737 states and 103197 transitions. [2022-11-20 20:27:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:27:49,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-20 20:27:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:27:50,016 INFO L225 Difference]: With dead ends: 65737 [2022-11-20 20:27:50,016 INFO L226 Difference]: Without dead ends: 43828 [2022-11-20 20:27:50,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:27:50,093 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 274 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:27:50,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 447 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:27:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43828 states. [2022-11-20 20:27:56,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43828 to 43600. [2022-11-20 20:27:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43600 states, 36582 states have (on average 1.4912525285659615) internal successors, (54553), 36788 states have internal predecessors, (54553), 4856 states have call successors, (4856), 2143 states have call predecessors, (4856), 2160 states have return successors, (7059), 4670 states have call predecessors, (7059), 4853 states have call successors, (7059) [2022-11-20 20:27:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43600 states to 43600 states and 66468 transitions. [2022-11-20 20:27:56,905 INFO L78 Accepts]: Start accepts. Automaton has 43600 states and 66468 transitions. Word has length 147 [2022-11-20 20:27:56,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:27:56,906 INFO L495 AbstractCegarLoop]: Abstraction has 43600 states and 66468 transitions. [2022-11-20 20:27:56,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-20 20:27:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 43600 states and 66468 transitions. [2022-11-20 20:27:56,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-20 20:27:56,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:27:56,990 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 20:27:56,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 20:27:56,990 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:27:56,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:27:56,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1151749916, now seen corresponding path program 1 times [2022-11-20 20:27:56,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:27:56,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33178307] [2022-11-20 20:27:56,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:27:56,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:27:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:27:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-20 20:27:57,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:27:57,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33178307] [2022-11-20 20:27:57,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33178307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:27:57,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:27:57,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:27:57,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961912646] [2022-11-20 20:27:57,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:27:57,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:27:57,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:27:57,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:27:57,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:27:57,078 INFO L87 Difference]: Start difference. First operand 43600 states and 66468 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)