./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.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_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/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_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/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_6f6e1d2c-83c0-4258-962d-bfc72634a876/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 74d57b3f1e9a386b0ff6bac396d798184771ae1b1b0bb917f750fc3ebefb1c2f --- 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 01:55:40,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:55:40,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:55:40,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:55:40,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:55:40,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:55:40,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:55:40,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:55:40,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:55:40,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:55:40,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:55:40,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:55:40,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:55:40,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:55:40,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:55:40,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:55:40,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:55:40,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:55:40,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:55:40,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:55:40,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:55:40,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:55:40,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:55:40,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:55:40,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:55:40,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:55:40,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:55:40,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:55:40,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:55:40,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:55:40,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:55:40,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:55:40,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:55:40,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:55:40,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:55:40,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:55:40,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:55:40,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:55:40,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:55:40,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:55:40,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:55:40,385 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:55:40,420 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:55:40,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:55:40,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:55:40,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:55:40,427 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:55:40,428 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:55:40,428 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:55:40,428 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:55:40,429 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:55:40,429 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:55:40,430 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:55:40,430 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:55:40,430 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:55:40,430 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:55:40,431 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:55:40,431 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:55:40,431 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:55:40,431 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:55:40,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:55:40,432 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:55:40,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:55:40,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:55:40,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:55:40,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:55:40,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:55:40,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:55:40,435 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:55:40,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:55:40,435 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:55:40,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:55:40,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:55:40,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:55:40,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:55:40,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:55:40,437 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:55:40,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:55:40,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:55:40,437 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:55:40,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:55:40,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:55:40,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:55:40,438 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_6f6e1d2c-83c0-4258-962d-bfc72634a876/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74d57b3f1e9a386b0ff6bac396d798184771ae1b1b0bb917f750fc3ebefb1c2f [2022-11-03 01:55:40,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:55:40,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:55:40,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:55:40,716 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:55:40,717 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:55:40,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-03 01:55:40,801 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI/data/20f766a75/2e3d66861bb84075a6d79ba372043f7c/FLAGa2fca84ae [2022-11-03 01:55:41,278 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:55:41,279 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-03 01:55:41,288 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI/data/20f766a75/2e3d66861bb84075a6d79ba372043f7c/FLAGa2fca84ae [2022-11-03 01:55:41,751 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI/data/20f766a75/2e3d66861bb84075a6d79ba372043f7c [2022-11-03 01:55:41,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:55:41,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:55:41,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:55:41,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:55:41,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:55:41,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:55:41" (1/1) ... [2022-11-03 01:55:41,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38f3ed63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:55:41, skipping insertion in model container [2022-11-03 01:55:41,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:55:41" (1/1) ... [2022-11-03 01:55:41,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:55:41,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:55:42,061 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_6f6e1d2c-83c0-4258-962d-bfc72634a876/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6874,6887] [2022-11-03 01:55:42,089 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_6f6e1d2c-83c0-4258-962d-bfc72634a876/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9049,9062] [2022-11-03 01:55:42,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:55:42,124 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:55:42,213 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_6f6e1d2c-83c0-4258-962d-bfc72634a876/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6874,6887] [2022-11-03 01:55:42,222 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_6f6e1d2c-83c0-4258-962d-bfc72634a876/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9049,9062] [2022-11-03 01:55:42,229 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:55:42,244 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:55:42,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:55:42 WrapperNode [2022-11-03 01:55:42,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:55:42,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:55:42,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:55:42,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:55:42,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:55:42" (1/1) ... [2022-11-03 01:55:42,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:55:42" (1/1) ... [2022-11-03 01:55:42,298 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 445 [2022-11-03 01:55:42,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:55:42,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:55:42,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:55:42,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:55:42,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:55:42" (1/1) ... [2022-11-03 01:55:42,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:55:42" (1/1) ... [2022-11-03 01:55:42,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:55:42" (1/1) ... [2022-11-03 01:55:42,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:55:42" (1/1) ... [2022-11-03 01:55:42,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:55:42" (1/1) ... [2022-11-03 01:55:42,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:55:42" (1/1) ... [2022-11-03 01:55:42,341 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:55:42" (1/1) ... [2022-11-03 01:55:42,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:55:42" (1/1) ... [2022-11-03 01:55:42,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:55:42,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:55:42,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:55:42,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:55:42,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:55:42" (1/1) ... [2022-11-03 01:55:42,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:55:42,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:42,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:55:42,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:55:42,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:55:42,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:55:42,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:55:42,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:55:42,553 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:55:42,555 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:55:43,048 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:55:43,155 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:55:43,156 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 01:55:43,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:55:43 BoogieIcfgContainer [2022-11-03 01:55:43,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:55:43,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:55:43,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:55:43,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:55:43,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:55:41" (1/3) ... [2022-11-03 01:55:43,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ead27e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:55:43, skipping insertion in model container [2022-11-03 01:55:43,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:55:42" (2/3) ... [2022-11-03 01:55:43,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ead27e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:55:43, skipping insertion in model container [2022-11-03 01:55:43,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:55:43" (3/3) ... [2022-11-03 01:55:43,167 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-03 01:55:43,187 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:55:43,187 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 01:55:43,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:55:43,248 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;@c61e204, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:55:43,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 01:55:43,253 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 74 states have (on average 1.7567567567567568) internal successors, (130), 76 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:55:43,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:43,262 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] [2022-11-03 01:55:43,263 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:43,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:43,269 INFO L85 PathProgramCache]: Analyzing trace with hash 545931680, now seen corresponding path program 1 times [2022-11-03 01:55:43,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:43,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606374698] [2022-11-03 01:55:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:43,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:43,828 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 01:55:43,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:43,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606374698] [2022-11-03 01:55:43,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606374698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:43,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:43,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:55:43,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948535255] [2022-11-03 01:55:43,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:43,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:43,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:43,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:43,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:43,869 INFO L87 Difference]: Start difference. First operand has 77 states, 74 states have (on average 1.7567567567567568) internal successors, (130), 76 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:44,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:44,020 INFO L93 Difference]: Finished difference Result 137 states and 221 transitions. [2022-11-03 01:55:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:55:44,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 01:55:44,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:44,032 INFO L225 Difference]: With dead ends: 137 [2022-11-03 01:55:44,032 INFO L226 Difference]: Without dead ends: 75 [2022-11-03 01:55:44,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:55:44,039 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 341 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:44,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 88 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:44,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-03 01:55:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-03 01:55:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 74 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2022-11-03 01:55:44,104 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 40 [2022-11-03 01:55:44,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:44,105 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2022-11-03 01:55:44,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2022-11-03 01:55:44,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 01:55:44,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:44,107 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] [2022-11-03 01:55:44,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:55:44,108 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:44,109 INFO L85 PathProgramCache]: Analyzing trace with hash -400915697, now seen corresponding path program 1 times [2022-11-03 01:55:44,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:44,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194263348] [2022-11-03 01:55:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:44,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:44,313 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 01:55:44,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:44,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194263348] [2022-11-03 01:55:44,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194263348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:44,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:44,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:55:44,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426482926] [2022-11-03 01:55:44,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:44,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:44,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:44,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:44,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:44,318 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:44,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:44,421 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2022-11-03 01:55:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:55:44,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-03 01:55:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:44,423 INFO L225 Difference]: With dead ends: 121 [2022-11-03 01:55:44,423 INFO L226 Difference]: Without dead ends: 75 [2022-11-03 01:55:44,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:55:44,425 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 207 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:44,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 70 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:44,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-03 01:55:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-03 01:55:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 74 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-11-03 01:55:44,440 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 41 [2022-11-03 01:55:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:44,440 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-11-03 01:55:44,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:44,441 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-11-03 01:55:44,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 01:55:44,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:44,442 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] [2022-11-03 01:55:44,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:55:44,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:44,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:44,443 INFO L85 PathProgramCache]: Analyzing trace with hash 247847808, now seen corresponding path program 1 times [2022-11-03 01:55:44,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:44,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827904727] [2022-11-03 01:55:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:44,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:44,595 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 01:55:44,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:44,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827904727] [2022-11-03 01:55:44,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827904727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:44,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:44,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:55:44,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044596140] [2022-11-03 01:55:44,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:44,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:44,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:44,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:44,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:55:44,599 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:44,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:44,697 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2022-11-03 01:55:44,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:55:44,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-03 01:55:44,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:44,699 INFO L225 Difference]: With dead ends: 125 [2022-11-03 01:55:44,699 INFO L226 Difference]: Without dead ends: 75 [2022-11-03 01:55:44,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:55:44,701 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 212 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:44,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 62 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:44,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-03 01:55:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-03 01:55:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 74 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2022-11-03 01:55:44,716 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 42 [2022-11-03 01:55:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:44,717 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2022-11-03 01:55:44,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2022-11-03 01:55:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 01:55:44,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:44,719 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] [2022-11-03 01:55:44,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:55:44,719 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:44,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1247651491, now seen corresponding path program 1 times [2022-11-03 01:55:44,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:44,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958619315] [2022-11-03 01:55:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:44,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:49,028 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 01:55:49,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:49,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958619315] [2022-11-03 01:55:49,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958619315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:49,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:49,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-03 01:55:49,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415380079] [2022-11-03 01:55:49,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:49,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 01:55:49,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:49,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 01:55:49,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:55:49,032 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:52,210 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2022-11-03 01:55:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 01:55:52,211 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-03 01:55:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:52,212 INFO L225 Difference]: With dead ends: 128 [2022-11-03 01:55:52,212 INFO L226 Difference]: Without dead ends: 100 [2022-11-03 01:55:52,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 01:55:52,214 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 248 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:52,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 455 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:55:52,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-03 01:55:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-11-03 01:55:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 1.1875) internal successors, (114), 97 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2022-11-03 01:55:52,235 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 43 [2022-11-03 01:55:52,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:52,235 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2022-11-03 01:55:52,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:52,236 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2022-11-03 01:55:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 01:55:52,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:52,237 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] [2022-11-03 01:55:52,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:55:52,237 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:52,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:52,238 INFO L85 PathProgramCache]: Analyzing trace with hash -154069483, now seen corresponding path program 1 times [2022-11-03 01:55:52,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:52,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487227379] [2022-11-03 01:55:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:52,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:56,382 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 01:55:56,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:56,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487227379] [2022-11-03 01:55:56,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487227379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:56,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:56,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-03 01:55:56,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912048604] [2022-11-03 01:55:56,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:56,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 01:55:56,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:56,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 01:55:56,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:55:56,385 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:00,833 INFO L93 Difference]: Finished difference Result 177 states and 217 transitions. [2022-11-03 01:56:00,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 01:56:00,834 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-03 01:56:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:00,836 INFO L225 Difference]: With dead ends: 177 [2022-11-03 01:56:00,836 INFO L226 Difference]: Without dead ends: 123 [2022-11-03 01:56:00,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=425, Invalid=1215, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 01:56:00,838 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 367 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:00,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 469 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:56:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-03 01:56:00,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2022-11-03 01:56:00,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2083333333333333) internal successors, (145), 120 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:00,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2022-11-03 01:56:00,862 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 44 [2022-11-03 01:56:00,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:00,863 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2022-11-03 01:56:00,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:00,863 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2022-11-03 01:56:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 01:56:00,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:00,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:00,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:56:00,865 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:00,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:00,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1564589152, now seen corresponding path program 1 times [2022-11-03 01:56:00,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:00,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657228485] [2022-11-03 01:56:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:00,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:00,979 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 01:56:00,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:00,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657228485] [2022-11-03 01:56:00,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657228485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:00,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:00,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:56:00,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037093162] [2022-11-03 01:56:00,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:00,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:00,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:00,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:00,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:00,982 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:01,048 INFO L93 Difference]: Finished difference Result 245 states and 308 transitions. [2022-11-03 01:56:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:01,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-03 01:56:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:01,050 INFO L225 Difference]: With dead ends: 245 [2022-11-03 01:56:01,050 INFO L226 Difference]: Without dead ends: 168 [2022-11-03 01:56:01,050 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 01:56:01,051 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 34 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:01,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 160 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:56:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-03 01:56:01,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 154. [2022-11-03 01:56:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.2287581699346406) internal successors, (188), 153 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 188 transitions. [2022-11-03 01:56:01,081 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 188 transitions. Word has length 56 [2022-11-03 01:56:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:01,081 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 188 transitions. [2022-11-03 01:56:01,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 188 transitions. [2022-11-03 01:56:01,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 01:56:01,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:01,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:01,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:56:01,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1337162555, now seen corresponding path program 1 times [2022-11-03 01:56:01,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:01,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573043771] [2022-11-03 01:56:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:01,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:01,195 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 01:56:01,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:01,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573043771] [2022-11-03 01:56:01,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573043771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:01,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:01,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:56:01,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695059585] [2022-11-03 01:56:01,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:01,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:01,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:01,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:01,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:01,198 INFO L87 Difference]: Start difference. First operand 154 states and 188 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:01,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:01,271 INFO L93 Difference]: Finished difference Result 356 states and 453 transitions. [2022-11-03 01:56:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:01,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-03 01:56:01,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:01,274 INFO L225 Difference]: With dead ends: 356 [2022-11-03 01:56:01,274 INFO L226 Difference]: Without dead ends: 246 [2022-11-03 01:56:01,274 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 01:56:01,275 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 29 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:01,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 154 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:56:01,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-03 01:56:01,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 228. [2022-11-03 01:56:01,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.251101321585903) internal successors, (284), 227 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:01,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 284 transitions. [2022-11-03 01:56:01,311 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 284 transitions. Word has length 59 [2022-11-03 01:56:01,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:01,311 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 284 transitions. [2022-11-03 01:56:01,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:01,312 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 284 transitions. [2022-11-03 01:56:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 01:56:01,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:01,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:01,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:56:01,313 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:01,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:01,314 INFO L85 PathProgramCache]: Analyzing trace with hash 870364693, now seen corresponding path program 1 times [2022-11-03 01:56:01,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:01,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916640553] [2022-11-03 01:56:01,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:01,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:01,419 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 01:56:01,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:01,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916640553] [2022-11-03 01:56:01,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916640553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:01,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:01,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:56:01,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455054908] [2022-11-03 01:56:01,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:01,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:01,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:01,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:01,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:01,422 INFO L87 Difference]: Start difference. First operand 228 states and 284 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:01,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:01,505 INFO L93 Difference]: Finished difference Result 590 states and 757 transitions. [2022-11-03 01:56:01,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:01,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-03 01:56:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:01,508 INFO L225 Difference]: With dead ends: 590 [2022-11-03 01:56:01,508 INFO L226 Difference]: Without dead ends: 406 [2022-11-03 01:56:01,509 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 01:56:01,510 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 24 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:01,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 145 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:56:01,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-11-03 01:56:01,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 380. [2022-11-03 01:56:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.266490765171504) internal successors, (480), 379 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 480 transitions. [2022-11-03 01:56:01,568 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 480 transitions. Word has length 62 [2022-11-03 01:56:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:01,568 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 480 transitions. [2022-11-03 01:56:01,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 480 transitions. [2022-11-03 01:56:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 01:56:01,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:01,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:01,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 01:56:01,570 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:01,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:01,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1974022870, now seen corresponding path program 1 times [2022-11-03 01:56:01,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:01,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921791634] [2022-11-03 01:56:01,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:01,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:01,632 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 01:56:01,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:01,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921791634] [2022-11-03 01:56:01,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921791634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:01,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:01,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:56:01,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46663073] [2022-11-03 01:56:01,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:01,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:01,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:01,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:01,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:01,635 INFO L87 Difference]: Start difference. First operand 380 states and 480 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:01,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:01,752 INFO L93 Difference]: Finished difference Result 880 states and 1129 transitions. [2022-11-03 01:56:01,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:01,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-03 01:56:01,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:01,755 INFO L225 Difference]: With dead ends: 880 [2022-11-03 01:56:01,755 INFO L226 Difference]: Without dead ends: 544 [2022-11-03 01:56:01,756 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 01:56:01,756 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 52 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:01,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 100 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:56:01,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-11-03 01:56:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 542. [2022-11-03 01:56:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 1.2698706099815158) internal successors, (687), 541 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 687 transitions. [2022-11-03 01:56:01,845 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 687 transitions. Word has length 67 [2022-11-03 01:56:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:01,846 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 687 transitions. [2022-11-03 01:56:01,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 687 transitions. [2022-11-03 01:56:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 01:56:01,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:01,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:01,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:56:01,848 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash -280997077, now seen corresponding path program 1 times [2022-11-03 01:56:01,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:01,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126012758] [2022-11-03 01:56:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:01,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:02,132 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 01:56:02,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:02,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126012758] [2022-11-03 01:56:02,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126012758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:02,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:02,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:56:02,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130233558] [2022-11-03 01:56:02,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:02,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:56:02,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:02,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:56:02,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:56:02,135 INFO L87 Difference]: Start difference. First operand 542 states and 687 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:02,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:02,488 INFO L93 Difference]: Finished difference Result 702 states and 876 transitions. [2022-11-03 01:56:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:56:02,488 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 01:56:02,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:02,492 INFO L225 Difference]: With dead ends: 702 [2022-11-03 01:56:02,492 INFO L226 Difference]: Without dead ends: 700 [2022-11-03 01:56:02,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:56:02,494 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 182 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:02,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 481 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-11-03 01:56:02,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 542. [2022-11-03 01:56:02,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 1.255083179297597) internal successors, (679), 541 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 679 transitions. [2022-11-03 01:56:02,615 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 679 transitions. Word has length 68 [2022-11-03 01:56:02,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:02,616 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 679 transitions. [2022-11-03 01:56:02,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:02,617 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 679 transitions. [2022-11-03 01:56:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 01:56:02,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:02,626 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:02,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 01:56:02,627 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:02,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:02,627 INFO L85 PathProgramCache]: Analyzing trace with hash -573795308, now seen corresponding path program 1 times [2022-11-03 01:56:02,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:02,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034902605] [2022-11-03 01:56:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:02,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:19,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:19,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034902605] [2022-11-03 01:56:19,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034902605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:19,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699630762] [2022-11-03 01:56:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:19,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:19,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:19,478 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:19,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f6e1d2c-83c0-4258-962d-bfc72634a876/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:56:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:19,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-03 01:56:19,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:32,019 WARN L234 SmtUtils]: Spent 20.89s on a formula simplification. DAG size of input: 7571 DAG size of output: 7311 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:06:58,118 WARN L234 SmtUtils]: Spent 43.40s on a formula simplification. DAG size of input: 7383 DAG size of output: 7181 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)