./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI --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 a6baa92d18991a792383fc99c5c300f37f700ba00714b15a3dbe7d2191a67ca9 --- 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-5e519f3 [2022-11-03 02:34:56,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:34:56,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:34:56,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:34:56,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:34:56,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:34:56,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:34:56,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:34:56,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:34:56,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:34:56,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:34:56,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:34:56,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:34:56,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:34:56,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:34:56,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:34:56,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:34:56,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:34:56,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:34:56,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:34:56,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:34:56,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:34:56,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:34:56,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:34:56,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:34:56,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:34:56,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:34:56,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:34:56,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:34:56,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:34:56,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:34:56,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:34:56,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:34:56,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:34:56,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:34:56,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:34:56,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:34:56,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:34:56,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:34:56,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:34:56,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:34:56,368 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:34:56,403 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:34:56,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:34:56,407 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:34:56,407 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:34:56,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:34:56,412 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:34:56,413 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:34:56,413 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:34:56,414 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:34:56,414 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:34:56,414 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:34:56,416 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:34:56,417 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:34:56,417 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:34:56,417 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:34:56,417 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:34:56,418 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:34:56,418 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:34:56,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:34:56,419 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:34:56,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:34:56,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:34:56,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:34:56,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:34:56,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:34:56,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:34:56,421 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:34:56,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:34:56,422 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:34:56,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:34:56,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:34:56,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:34:56,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:56,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:34:56,424 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:34:56,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:34:56,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:34:56,424 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:34:56,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:34:56,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:34:56,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:34:56,425 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_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6baa92d18991a792383fc99c5c300f37f700ba00714b15a3dbe7d2191a67ca9 [2022-11-03 02:34:56,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:34:56,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:34:56,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:34:56,737 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:34:56,738 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:34:56,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/systemc/token_ring.07.cil-1.c [2022-11-03 02:34:56,801 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/data/4a9fba0de/2c0e2316dd8248a4968d7e404d5fc1b6/FLAGc6470c874 [2022-11-03 02:34:57,287 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:34:57,288 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/sv-benchmarks/c/systemc/token_ring.07.cil-1.c [2022-11-03 02:34:57,300 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/data/4a9fba0de/2c0e2316dd8248a4968d7e404d5fc1b6/FLAGc6470c874 [2022-11-03 02:34:57,639 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/data/4a9fba0de/2c0e2316dd8248a4968d7e404d5fc1b6 [2022-11-03 02:34:57,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:34:57,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:34:57,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:34:57,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:34:57,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:34:57,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:34:57" (1/1) ... [2022-11-03 02:34:57,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36d6989a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:57, skipping insertion in model container [2022-11-03 02:34:57,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:34:57" (1/1) ... [2022-11-03 02:34:57,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:34:57,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:34:57,914 WARN L230 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_00112dff-965c-4b59-af12-d49184d4b347/sv-benchmarks/c/systemc/token_ring.07.cil-1.c[671,684] [2022-11-03 02:34:58,068 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:34:58,088 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:34:58,104 WARN L230 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_00112dff-965c-4b59-af12-d49184d4b347/sv-benchmarks/c/systemc/token_ring.07.cil-1.c[671,684] [2022-11-03 02:34:58,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:34:58,202 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:34:58,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:58 WrapperNode [2022-11-03 02:34:58,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:34:58,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:34:58,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:34:58,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:34:58,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:58" (1/1) ... [2022-11-03 02:34:58,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:58" (1/1) ... [2022-11-03 02:34:58,259 INFO L138 Inliner]: procedures = 42, calls = 52, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 563 [2022-11-03 02:34:58,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:34:58,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:34:58,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:34:58,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:34:58,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:58" (1/1) ... [2022-11-03 02:34:58,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:58" (1/1) ... [2022-11-03 02:34:58,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:58" (1/1) ... [2022-11-03 02:34:58,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:58" (1/1) ... [2022-11-03 02:34:58,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:58" (1/1) ... [2022-11-03 02:34:58,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:58" (1/1) ... [2022-11-03 02:34:58,299 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:58" (1/1) ... [2022-11-03 02:34:58,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:58" (1/1) ... [2022-11-03 02:34:58,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:34:58,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:34:58,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:34:58,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:34:58,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:58" (1/1) ... [2022-11-03 02:34:58,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:58,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:58,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:34:58,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:34:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:34:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 02:34:58,413 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 02:34:58,414 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 02:34:58,414 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 02:34:58,414 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:34:58,414 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:34:58,414 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 02:34:58,415 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 02:34:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 02:34:58,415 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 02:34:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:34:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 02:34:58,415 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 02:34:58,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:34:58,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:34:58,527 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:34:58,530 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:34:59,175 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:34:59,609 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:34:59,609 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-03 02:34:59,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:34:59 BoogieIcfgContainer [2022-11-03 02:34:59,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:34:59,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:34:59,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:34:59,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:34:59,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:34:57" (1/3) ... [2022-11-03 02:34:59,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31fc294b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:34:59, skipping insertion in model container [2022-11-03 02:34:59,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:58" (2/3) ... [2022-11-03 02:34:59,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31fc294b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:34:59, skipping insertion in model container [2022-11-03 02:34:59,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:34:59" (3/3) ... [2022-11-03 02:34:59,624 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.07.cil-1.c [2022-11-03 02:34:59,643 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:34:59,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:34:59,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:34:59,727 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;@4251c092, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:34:59,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:34:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 104 states have (on average 1.5384615384615385) internal successors, (160), 106 states have internal predecessors, (160), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-03 02:34:59,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 02:34:59,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:59,754 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] [2022-11-03 02:34:59,755 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:59,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:59,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1544777715, now seen corresponding path program 1 times [2022-11-03 02:34:59,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:59,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927746745] [2022-11-03 02:34:59,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:59,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:00,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:00,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927746745] [2022-11-03 02:35:00,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927746745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:00,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:00,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:00,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13883515] [2022-11-03 02:35:00,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:00,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:00,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:00,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:00,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:00,375 INFO L87 Difference]: Start difference. First operand has 133 states, 104 states have (on average 1.5384615384615385) internal successors, (160), 106 states have internal predecessors, (160), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:35:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:00,741 INFO L93 Difference]: Finished difference Result 382 states and 602 transitions. [2022-11-03 02:35:00,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:35:00,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-11-03 02:35:00,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:00,754 INFO L225 Difference]: With dead ends: 382 [2022-11-03 02:35:00,754 INFO L226 Difference]: Without dead ends: 250 [2022-11-03 02:35:00,759 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 [2022-11-03 02:35:00,762 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 343 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:00,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 530 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:35:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-03 02:35:00,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2022-11-03 02:35:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 198 states have (on average 1.4747474747474747) internal successors, (292), 200 states have internal predecessors, (292), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-03 02:35:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 368 transitions. [2022-11-03 02:35:00,859 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 368 transitions. Word has length 51 [2022-11-03 02:35:00,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:00,860 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 368 transitions. [2022-11-03 02:35:00,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:35:00,860 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 368 transitions. [2022-11-03 02:35:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:35:00,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:00,866 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:00,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:35:00,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:00,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1354790500, now seen corresponding path program 1 times [2022-11-03 02:35:00,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:00,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117413136] [2022-11-03 02:35:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:00,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:35:01,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:01,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117413136] [2022-11-03 02:35:01,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117413136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:01,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413510988] [2022-11-03 02:35:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:01,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:01,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:01,083 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:01,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:35:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:01,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:35:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:35:01,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:01,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413510988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:01,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:01,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:35:01,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403170527] [2022-11-03 02:35:01,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:01,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:01,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:01,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:01,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:01,427 INFO L87 Difference]: Start difference. First operand 249 states and 368 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:35:01,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:01,596 INFO L93 Difference]: Finished difference Result 730 states and 1097 transitions. [2022-11-03 02:35:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:01,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 100 [2022-11-03 02:35:01,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:01,608 INFO L225 Difference]: With dead ends: 730 [2022-11-03 02:35:01,608 INFO L226 Difference]: Without dead ends: 486 [2022-11-03 02:35:01,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:01,615 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 162 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:01,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 353 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:01,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-11-03 02:35:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 482. [2022-11-03 02:35:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 387 states have (on average 1.4702842377260983) internal successors, (569), 390 states have internal predecessors, (569), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-03 02:35:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 709 transitions. [2022-11-03 02:35:01,703 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 709 transitions. Word has length 100 [2022-11-03 02:35:01,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:01,704 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 709 transitions. [2022-11-03 02:35:01,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:35:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 709 transitions. [2022-11-03 02:35:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:35:01,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:01,715 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:01,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:01,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:01,931 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:01,932 INFO L85 PathProgramCache]: Analyzing trace with hash -80667738, now seen corresponding path program 1 times [2022-11-03 02:35:01,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:01,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890085866] [2022-11-03 02:35:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:01,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:35:02,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:02,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890085866] [2022-11-03 02:35:02,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890085866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:02,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323641787] [2022-11-03 02:35:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:02,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:02,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:02,143 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:02,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:35:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:02,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:35:02,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:35:02,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:02,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323641787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:02,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:02,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:35:02,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136786634] [2022-11-03 02:35:02,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:02,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:02,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:02,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:02,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:02,450 INFO L87 Difference]: Start difference. First operand 482 states and 709 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:35:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:02,630 INFO L93 Difference]: Finished difference Result 1423 states and 2128 transitions. [2022-11-03 02:35:02,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:02,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 100 [2022-11-03 02:35:02,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:02,638 INFO L225 Difference]: With dead ends: 1423 [2022-11-03 02:35:02,640 INFO L226 Difference]: Without dead ends: 946 [2022-11-03 02:35:02,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:02,646 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 168 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:02,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 341 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-11-03 02:35:02,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 940. [2022-11-03 02:35:02,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 759 states have (on average 1.463768115942029) internal successors, (1111), 764 states have internal predecessors, (1111), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2022-11-03 02:35:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1375 transitions. [2022-11-03 02:35:02,743 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1375 transitions. Word has length 100 [2022-11-03 02:35:02,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:02,745 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1375 transitions. [2022-11-03 02:35:02,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:35:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1375 transitions. [2022-11-03 02:35:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:35:02,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:02,750 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:02,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:02,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:02,967 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:02,968 INFO L85 PathProgramCache]: Analyzing trace with hash 422397800, now seen corresponding path program 1 times [2022-11-03 02:35:02,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:02,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992917880] [2022-11-03 02:35:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:02,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:35:03,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:03,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992917880] [2022-11-03 02:35:03,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992917880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:03,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008649491] [2022-11-03 02:35:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:03,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:03,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:03,207 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:03,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:35:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:03,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:35:03,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:35:03,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:03,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008649491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:03,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:03,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:35:03,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702289074] [2022-11-03 02:35:03,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:03,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:03,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:03,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:03,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:03,446 INFO L87 Difference]: Start difference. First operand 940 states and 1375 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:35:03,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:03,628 INFO L93 Difference]: Finished difference Result 2785 states and 4140 transitions. [2022-11-03 02:35:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:03,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 100 [2022-11-03 02:35:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:03,642 INFO L225 Difference]: With dead ends: 2785 [2022-11-03 02:35:03,643 INFO L226 Difference]: Without dead ends: 1850 [2022-11-03 02:35:03,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:03,648 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 171 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:03,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 351 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2022-11-03 02:35:03,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1840. [2022-11-03 02:35:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1491 states have (on average 1.4560697518443997) internal successors, (2171), 1500 states have internal predecessors, (2171), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2022-11-03 02:35:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 2675 transitions. [2022-11-03 02:35:03,781 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 2675 transitions. Word has length 100 [2022-11-03 02:35:03,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:03,781 INFO L495 AbstractCegarLoop]: Abstraction has 1840 states and 2675 transitions. [2022-11-03 02:35:03,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:35:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 2675 transitions. [2022-11-03 02:35:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:35:03,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:03,786 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:03,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:03,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:03,999 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:03,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:03,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2106944614, now seen corresponding path program 1 times [2022-11-03 02:35:04,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:04,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040635131] [2022-11-03 02:35:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:04,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:35:04,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:04,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040635131] [2022-11-03 02:35:04,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040635131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:04,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141841710] [2022-11-03 02:35:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:04,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:04,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:04,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:04,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:35:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:04,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:35:04,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:35:04,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:04,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141841710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:04,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:04,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:35:04,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845144094] [2022-11-03 02:35:04,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:04,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:04,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:04,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:04,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:04,456 INFO L87 Difference]: Start difference. First operand 1840 states and 2675 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:35:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:04,727 INFO L93 Difference]: Finished difference Result 5461 states and 8064 transitions. [2022-11-03 02:35:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:04,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 100 [2022-11-03 02:35:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:04,747 INFO L225 Difference]: With dead ends: 5461 [2022-11-03 02:35:04,748 INFO L226 Difference]: Without dead ends: 3626 [2022-11-03 02:35:04,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:04,758 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 156 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:04,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 325 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3626 states. [2022-11-03 02:35:04,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 3608. [2022-11-03 02:35:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3608 states, 2931 states have (on average 1.4476287956328897) internal successors, (4243), 2948 states have internal predecessors, (4243), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2022-11-03 02:35:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3608 states to 3608 states and 5211 transitions. [2022-11-03 02:35:05,001 INFO L78 Accepts]: Start accepts. Automaton has 3608 states and 5211 transitions. Word has length 100 [2022-11-03 02:35:05,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:05,002 INFO L495 AbstractCegarLoop]: Abstraction has 3608 states and 5211 transitions. [2022-11-03 02:35:05,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:35:05,002 INFO L276 IsEmpty]: Start isEmpty. Operand 3608 states and 5211 transitions. [2022-11-03 02:35:05,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:35:05,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:05,011 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:05,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:05,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:05,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:05,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1572055848, now seen corresponding path program 1 times [2022-11-03 02:35:05,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:05,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427243667] [2022-11-03 02:35:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:05,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:35:05,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:05,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427243667] [2022-11-03 02:35:05,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427243667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:05,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:05,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:05,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085687367] [2022-11-03 02:35:05,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:05,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:05,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:05,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:05,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:05,332 INFO L87 Difference]: Start difference. First operand 3608 states and 5211 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:35:05,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:05,598 INFO L93 Difference]: Finished difference Result 6410 states and 9404 transitions. [2022-11-03 02:35:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:05,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 100 [2022-11-03 02:35:05,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:05,623 INFO L225 Difference]: With dead ends: 6410 [2022-11-03 02:35:05,623 INFO L226 Difference]: Without dead ends: 4568 [2022-11-03 02:35:05,629 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 [2022-11-03 02:35:05,630 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 82 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:05,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 412 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4568 states. [2022-11-03 02:35:05,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4568 to 4248. [2022-11-03 02:35:05,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 3539 states have (on average 1.4927945747386266) internal successors, (5283), 3556 states have internal predecessors, (5283), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2022-11-03 02:35:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 6283 transitions. [2022-11-03 02:35:05,873 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 6283 transitions. Word has length 100 [2022-11-03 02:35:05,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:05,874 INFO L495 AbstractCegarLoop]: Abstraction has 4248 states and 6283 transitions. [2022-11-03 02:35:05,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:35:05,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 6283 transitions. [2022-11-03 02:35:05,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 02:35:05,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:05,885 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, 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] [2022-11-03 02:35:05,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:35:05,886 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:05,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:05,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1888087275, now seen corresponding path program 1 times [2022-11-03 02:35:05,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:05,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680664989] [2022-11-03 02:35:05,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:05,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 02:35:05,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:05,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680664989] [2022-11-03 02:35:05,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680664989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:05,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:05,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:05,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857622203] [2022-11-03 02:35:05,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:05,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:05,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:05,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:05,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:05,978 INFO L87 Difference]: Start difference. First operand 4248 states and 6283 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:35:06,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:06,502 INFO L93 Difference]: Finished difference Result 12589 states and 18832 transitions. [2022-11-03 02:35:06,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 135 [2022-11-03 02:35:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:06,550 INFO L225 Difference]: With dead ends: 12589 [2022-11-03 02:35:06,550 INFO L226 Difference]: Without dead ends: 8346 [2022-11-03 02:35:06,563 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 [2022-11-03 02:35:06,564 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 160 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:06,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 327 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:06,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2022-11-03 02:35:07,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 8296. [2022-11-03 02:35:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8296 states, 6915 states have (on average 1.4812725958062183) internal successors, (10243), 6948 states have internal predecessors, (10243), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2022-11-03 02:35:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8296 states to 8296 states and 12171 transitions. [2022-11-03 02:35:07,063 INFO L78 Accepts]: Start accepts. Automaton has 8296 states and 12171 transitions. Word has length 135 [2022-11-03 02:35:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:07,064 INFO L495 AbstractCegarLoop]: Abstraction has 8296 states and 12171 transitions. [2022-11-03 02:35:07,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:35:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 8296 states and 12171 transitions. [2022-11-03 02:35:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 02:35:07,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:07,086 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, 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] [2022-11-03 02:35:07,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:35:07,086 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:07,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:07,087 INFO L85 PathProgramCache]: Analyzing trace with hash 900535354, now seen corresponding path program 1 times [2022-11-03 02:35:07,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:07,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126410797] [2022-11-03 02:35:07,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:07,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 02:35:07,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:07,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126410797] [2022-11-03 02:35:07,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126410797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:07,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:07,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:07,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300523053] [2022-11-03 02:35:07,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:07,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:07,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:07,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:07,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:07,177 INFO L87 Difference]: Start difference. First operand 8296 states and 12171 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:35:08,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:08,156 INFO L93 Difference]: Finished difference Result 24589 states and 36464 transitions. [2022-11-03 02:35:08,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:08,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 135 [2022-11-03 02:35:08,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:08,312 INFO L225 Difference]: With dead ends: 24589 [2022-11-03 02:35:08,312 INFO L226 Difference]: Without dead ends: 16298 [2022-11-03 02:35:08,339 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 [2022-11-03 02:35:08,340 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 162 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:08,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 327 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:08,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16298 states. [2022-11-03 02:35:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16298 to 16200. [2022-11-03 02:35:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16200 states, 13507 states have (on average 1.4690901014288886) internal successors, (19843), 13572 states have internal predecessors, (19843), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2022-11-03 02:35:09,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16200 states to 16200 states and 23563 transitions. [2022-11-03 02:35:09,359 INFO L78 Accepts]: Start accepts. Automaton has 16200 states and 23563 transitions. Word has length 135 [2022-11-03 02:35:09,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:09,360 INFO L495 AbstractCegarLoop]: Abstraction has 16200 states and 23563 transitions. [2022-11-03 02:35:09,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:35:09,361 INFO L276 IsEmpty]: Start isEmpty. Operand 16200 states and 23563 transitions. [2022-11-03 02:35:09,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 02:35:09,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:09,549 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, 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] [2022-11-03 02:35:09,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:35:09,549 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:09,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:09,550 INFO L85 PathProgramCache]: Analyzing trace with hash 184882679, now seen corresponding path program 1 times [2022-11-03 02:35:09,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:09,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757984005] [2022-11-03 02:35:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:09,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 02:35:09,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:09,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757984005] [2022-11-03 02:35:09,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757984005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:09,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:09,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:09,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213315097] [2022-11-03 02:35:09,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:09,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:09,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:09,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:09,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:09,684 INFO L87 Difference]: Start difference. First operand 16200 states and 23563 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:35:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:11,266 INFO L93 Difference]: Finished difference Result 48013 states and 70544 transitions. [2022-11-03 02:35:11,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:11,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 135 [2022-11-03 02:35:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:11,416 INFO L225 Difference]: With dead ends: 48013 [2022-11-03 02:35:11,416 INFO L226 Difference]: Without dead ends: 31818 [2022-11-03 02:35:11,488 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 [2022-11-03 02:35:11,491 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 165 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:11,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 341 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31818 states. [2022-11-03 02:35:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31818 to 31624. [2022-11-03 02:35:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31624 states, 26371 states have (on average 1.4562587691024231) internal successors, (38403), 26500 states have internal predecessors, (38403), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-11-03 02:35:13,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31624 states to 31624 states and 45579 transitions. [2022-11-03 02:35:13,632 INFO L78 Accepts]: Start accepts. Automaton has 31624 states and 45579 transitions. Word has length 135 [2022-11-03 02:35:13,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:13,633 INFO L495 AbstractCegarLoop]: Abstraction has 31624 states and 45579 transitions. [2022-11-03 02:35:13,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:35:13,633 INFO L276 IsEmpty]: Start isEmpty. Operand 31624 states and 45579 transitions. [2022-11-03 02:35:13,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 02:35:13,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:13,762 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, 3, 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] [2022-11-03 02:35:13,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:35:13,762 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:13,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:13,763 INFO L85 PathProgramCache]: Analyzing trace with hash 111574005, now seen corresponding path program 1 times [2022-11-03 02:35:13,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:13,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745966006] [2022-11-03 02:35:13,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:13,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-03 02:35:14,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:14,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745966006] [2022-11-03 02:35:14,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745966006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:14,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413657779] [2022-11-03 02:35:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:14,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:14,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:14,179 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:14,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:35:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:14,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:35:14,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:35:14,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:14,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413657779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:14,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:14,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:35:14,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011118046] [2022-11-03 02:35:14,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:14,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:14,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:14,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:14,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:14,451 INFO L87 Difference]: Start difference. First operand 31624 states and 45579 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:35:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:16,214 INFO L93 Difference]: Finished difference Result 60236 states and 87757 transitions. [2022-11-03 02:35:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:16,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 155 [2022-11-03 02:35:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:16,420 INFO L225 Difference]: With dead ends: 60236 [2022-11-03 02:35:16,420 INFO L226 Difference]: Without dead ends: 44138 [2022-11-03 02:35:16,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:16,467 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 125 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:16,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 448 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:16,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44138 states. [2022-11-03 02:35:18,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44138 to 38184. [2022-11-03 02:35:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38184 states, 32547 states have (on average 1.4984791224997696) internal successors, (48771), 32676 states have internal predecessors, (48771), 3780 states have call successors, (3780), 1856 states have call predecessors, (3780), 1856 states have return successors, (3780), 3652 states have call predecessors, (3780), 3780 states have call successors, (3780) [2022-11-03 02:35:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38184 states to 38184 states and 56331 transitions. [2022-11-03 02:35:18,931 INFO L78 Accepts]: Start accepts. Automaton has 38184 states and 56331 transitions. Word has length 155 [2022-11-03 02:35:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:18,932 INFO L495 AbstractCegarLoop]: Abstraction has 38184 states and 56331 transitions. [2022-11-03 02:35:18,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:35:18,933 INFO L276 IsEmpty]: Start isEmpty. Operand 38184 states and 56331 transitions. [2022-11-03 02:35:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 02:35:19,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:19,086 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, 3, 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] [2022-11-03 02:35:19,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:19,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:19,303 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:19,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1034892882, now seen corresponding path program 2 times [2022-11-03 02:35:19,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:19,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343266173] [2022-11-03 02:35:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:19,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 02:35:19,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:19,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343266173] [2022-11-03 02:35:19,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343266173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:19,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128309197] [2022-11-03 02:35:19,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:35:19,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:19,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:19,772 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:19,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00112dff-965c-4b59-af12-d49184d4b347/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:35:19,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:35:19,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:35:19,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:35:20,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 76 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:35:20,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 52 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:35:20,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128309197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:20,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131766946] [2022-11-03 02:35:20,881 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-11-03 02:35:20,882 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:35:20,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:35:20,891 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:35:20,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:36:05,910 WARN L234 SmtUtils]: Spent 5.91s on a formula simplification that was a NOOP. DAG size: 291 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 02:38:45,341 WARN L234 SmtUtils]: Spent 7.52s on a formula simplification that was a NOOP. DAG size: 495 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 02:38:52,955 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 152 for LOIs [2022-11-03 02:38:53,006 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2022-11-03 02:38:54,156 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 65536 conjuctions. This might take some time...