./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur --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 22565549446fb10d699e81ca4083722d91d5f2743033fe3de4e7c76b9089640a --- 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-38b53e6 [2022-11-25 23:19:31,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:19:31,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:19:31,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:19:31,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:19:31,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:19:31,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:19:31,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:19:31,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:19:31,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:19:31,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:19:31,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:19:31,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:19:31,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:19:31,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:19:31,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:19:31,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:19:31,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:19:31,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:19:31,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:19:31,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:19:31,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:19:31,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:19:31,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:19:31,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:19:31,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:19:31,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:19:31,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:19:31,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:19:31,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:19:31,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:19:31,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:19:31,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:19:31,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:19:31,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:19:31,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:19:31,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:19:31,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:19:31,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:19:31,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:19:31,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:19:31,437 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:19:31,473 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:19:31,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:19:31,473 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:19:31,473 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:19:31,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:19:31,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:19:31,474 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:19:31,475 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:19:31,475 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:19:31,475 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:19:31,475 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:19:31,476 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:19:31,476 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:19:31,476 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:19:31,476 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:19:31,476 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:19:31,477 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:19:31,477 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:19:31,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:19:31,478 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:19:31,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:19:31,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:19:31,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:19:31,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:19:31,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:19:31,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:19:31,483 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:19:31,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:19:31,484 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:19:31,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:19:31,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:19:31,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:19:31,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:19:31,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:19:31,485 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:19:31,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:19:31,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:19:31,487 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:19:31,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:19:31,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:19:31,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:19:31,488 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_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22565549446fb10d699e81ca4083722d91d5f2743033fe3de4e7c76b9089640a [2022-11-25 23:19:31,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:19:31,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:19:31,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:19:31,794 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:19:31,795 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:19:31,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-25 23:19:34,907 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:19:35,184 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:19:35,185 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-25 23:19:35,196 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/data/46ca3b4d8/485956d172714f3d9bb55dd90b692b67/FLAG27002c195 [2022-11-25 23:19:35,230 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/data/46ca3b4d8/485956d172714f3d9bb55dd90b692b67 [2022-11-25 23:19:35,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:19:35,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:19:35,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:19:35,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:19:35,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:19:35,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:19:35" (1/1) ... [2022-11-25 23:19:35,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7487b60b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:19:35, skipping insertion in model container [2022-11-25 23:19:35,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:19:35" (1/1) ... [2022-11-25 23:19:35,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:19:35,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:19:35,600 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7163,7176] [2022-11-25 23:19:35,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:19:35,708 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:19:35,772 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7163,7176] [2022-11-25 23:19:35,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:19:35,857 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:19:35,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:19:35 WrapperNode [2022-11-25 23:19:35,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:19:35,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:19:35,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:19:35,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:19:35,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:19:35" (1/1) ... [2022-11-25 23:19:35,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:19:35" (1/1) ... [2022-11-25 23:19:35,928 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 592 [2022-11-25 23:19:35,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:19:35,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:19:35,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:19:35,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:19:35,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:19:35" (1/1) ... [2022-11-25 23:19:35,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:19:35" (1/1) ... [2022-11-25 23:19:35,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:19:35" (1/1) ... [2022-11-25 23:19:35,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:19:35" (1/1) ... [2022-11-25 23:19:35,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:19:35" (1/1) ... [2022-11-25 23:19:35,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:19:35" (1/1) ... [2022-11-25 23:19:35,984 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:19:35" (1/1) ... [2022-11-25 23:19:35,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:19:35" (1/1) ... [2022-11-25 23:19:35,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:19:35,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:19:35,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:19:35,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:19:35,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:19:35" (1/1) ... [2022-11-25 23:19:36,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:19:36,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:19:36,049 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:19:36,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:19:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:19:36,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:19:36,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:19:36,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:19:36,257 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:19:36,259 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:19:36,990 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:19:37,255 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:19:37,255 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 23:19:37,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:19:37 BoogieIcfgContainer [2022-11-25 23:19:37,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:19:37,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:19:37,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:19:37,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:19:37,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:19:35" (1/3) ... [2022-11-25 23:19:37,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@85a7363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:19:37, skipping insertion in model container [2022-11-25 23:19:37,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:19:35" (2/3) ... [2022-11-25 23:19:37,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@85a7363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:19:37, skipping insertion in model container [2022-11-25 23:19:37,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:19:37" (3/3) ... [2022-11-25 23:19:37,272 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-25 23:19:37,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:19:37,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:19:37,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:19:37,352 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;@2723c569, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:19:37,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:19:37,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 114 states have (on average 1.6929824561403508) internal successors, (193), 115 states have internal predecessors, (193), 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) [2022-11-25 23:19:37,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 23:19:37,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:37,364 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] [2022-11-25 23:19:37,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:37,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:37,371 INFO L85 PathProgramCache]: Analyzing trace with hash 309617707, now seen corresponding path program 1 times [2022-11-25 23:19:37,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:37,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656831275] [2022-11-25 23:19:37,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:37,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:19:38,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:38,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656831275] [2022-11-25 23:19:38,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656831275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:19:38,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:19:38,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:19:38,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114920300] [2022-11-25 23:19:38,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:19:38,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:19:38,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:38,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:19:38,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:19:38,085 INFO L87 Difference]: Start difference. First operand has 116 states, 114 states have (on average 1.6929824561403508) internal successors, (193), 115 states have internal predecessors, (193), 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 8.4) internal successors, (42), 5 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) [2022-11-25 23:19:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:38,460 INFO L93 Difference]: Finished difference Result 311 states and 498 transitions. [2022-11-25 23:19:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:19:38,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 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 [2022-11-25 23:19:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:38,480 INFO L225 Difference]: With dead ends: 311 [2022-11-25 23:19:38,480 INFO L226 Difference]: Without dead ends: 231 [2022-11-25 23:19:38,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:19:38,488 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 364 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:38,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 534 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:19:38,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-25 23:19:38,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2022-11-25 23:19:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.3938053097345133) internal successors, (315), 226 states have internal predecessors, (315), 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) [2022-11-25 23:19:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 315 transitions. [2022-11-25 23:19:38,596 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 315 transitions. Word has length 42 [2022-11-25 23:19:38,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:38,598 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 315 transitions. [2022-11-25 23:19:38,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 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) [2022-11-25 23:19:38,598 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 315 transitions. [2022-11-25 23:19:38,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 23:19:38,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:38,602 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] [2022-11-25 23:19:38,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:19:38,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:38,604 INFO L85 PathProgramCache]: Analyzing trace with hash 931123585, now seen corresponding path program 1 times [2022-11-25 23:19:38,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:38,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673043177] [2022-11-25 23:19:38,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:38,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:19:38,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:38,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673043177] [2022-11-25 23:19:38,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673043177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:19:38,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:19:38,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:19:38,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010628922] [2022-11-25 23:19:38,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:19:38,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:19:38,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:38,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:19:38,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:19:38,861 INFO L87 Difference]: Start difference. First operand 227 states and 315 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 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) [2022-11-25 23:19:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:39,172 INFO L93 Difference]: Finished difference Result 500 states and 706 transitions. [2022-11-25 23:19:39,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:19:39,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 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 [2022-11-25 23:19:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:39,175 INFO L225 Difference]: With dead ends: 500 [2022-11-25 23:19:39,175 INFO L226 Difference]: Without dead ends: 299 [2022-11-25 23:19:39,184 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 [2022-11-25 23:19:39,186 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 405 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:39,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 156 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:19:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-25 23:19:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 297. [2022-11-25 23:19:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.3986486486486487) internal successors, (414), 296 states have internal predecessors, (414), 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) [2022-11-25 23:19:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 414 transitions. [2022-11-25 23:19:39,269 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 414 transitions. Word has length 43 [2022-11-25 23:19:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:39,270 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 414 transitions. [2022-11-25 23:19:39,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 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) [2022-11-25 23:19:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 414 transitions. [2022-11-25 23:19:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 23:19:39,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:39,281 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] [2022-11-25 23:19:39,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:19:39,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:39,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1767429776, now seen corresponding path program 1 times [2022-11-25 23:19:39,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:39,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382749305] [2022-11-25 23:19:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:39,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:19:39,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:39,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382749305] [2022-11-25 23:19:39,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382749305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:19:39,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:19:39,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:19:39,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482481154] [2022-11-25 23:19:39,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:19:39,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:19:39,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:39,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:19:39,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:19:39,454 INFO L87 Difference]: Start difference. First operand 297 states and 414 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 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) [2022-11-25 23:19:39,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:39,771 INFO L93 Difference]: Finished difference Result 718 states and 1023 transitions. [2022-11-25 23:19:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:19:39,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 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 [2022-11-25 23:19:39,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:39,774 INFO L225 Difference]: With dead ends: 718 [2022-11-25 23:19:39,774 INFO L226 Difference]: Without dead ends: 463 [2022-11-25 23:19:39,775 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 [2022-11-25 23:19:39,776 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 385 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:39,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 168 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:19:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-25 23:19:39,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 461. [2022-11-25 23:19:39,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4108695652173913) internal successors, (649), 460 states have internal predecessors, (649), 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) [2022-11-25 23:19:39,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 649 transitions. [2022-11-25 23:19:39,905 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 649 transitions. Word has length 43 [2022-11-25 23:19:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:39,905 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 649 transitions. [2022-11-25 23:19:39,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 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) [2022-11-25 23:19:39,906 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 649 transitions. [2022-11-25 23:19:39,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 23:19:39,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:39,909 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] [2022-11-25 23:19:39,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:19:39,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:39,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2036916769, now seen corresponding path program 1 times [2022-11-25 23:19:39,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:39,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092414876] [2022-11-25 23:19:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:39,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:19:40,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:40,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092414876] [2022-11-25 23:19:40,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092414876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:19:40,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:19:40,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:19:40,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558118712] [2022-11-25 23:19:40,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:19:40,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:19:40,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:40,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:19:40,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:19:40,011 INFO L87 Difference]: Start difference. First operand 461 states and 649 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 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) [2022-11-25 23:19:40,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:40,351 INFO L93 Difference]: Finished difference Result 1190 states and 1707 transitions. [2022-11-25 23:19:40,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:19:40,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 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 [2022-11-25 23:19:40,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:40,355 INFO L225 Difference]: With dead ends: 1190 [2022-11-25 23:19:40,355 INFO L226 Difference]: Without dead ends: 791 [2022-11-25 23:19:40,356 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 [2022-11-25 23:19:40,357 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 368 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:40,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 176 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:19:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-11-25 23:19:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 789. [2022-11-25 23:19:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 1.4200507614213198) internal successors, (1119), 788 states have internal predecessors, (1119), 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) [2022-11-25 23:19:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1119 transitions. [2022-11-25 23:19:40,502 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1119 transitions. Word has length 43 [2022-11-25 23:19:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:40,502 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1119 transitions. [2022-11-25 23:19:40,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 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) [2022-11-25 23:19:40,503 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1119 transitions. [2022-11-25 23:19:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 23:19:40,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:40,503 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] [2022-11-25 23:19:40,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:19:40,504 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash 364605887, now seen corresponding path program 1 times [2022-11-25 23:19:40,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:40,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16613232] [2022-11-25 23:19:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:40,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:19:41,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:41,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16613232] [2022-11-25 23:19:41,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16613232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:19:41,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:19:41,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 23:19:41,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811388047] [2022-11-25 23:19:41,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:19:41,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 23:19:41,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:41,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 23:19:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:19:41,140 INFO L87 Difference]: Start difference. First operand 789 states and 1119 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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) [2022-11-25 23:19:42,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:42,733 INFO L93 Difference]: Finished difference Result 4386 states and 6362 transitions. [2022-11-25 23:19:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 23:19:42,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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 [2022-11-25 23:19:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:42,748 INFO L225 Difference]: With dead ends: 4386 [2022-11-25 23:19:42,749 INFO L226 Difference]: Without dead ends: 3728 [2022-11-25 23:19:42,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:19:42,754 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1206 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:42,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1206 Valid, 834 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:19:42,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2022-11-25 23:19:43,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2326. [2022-11-25 23:19:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2325 states have (on average 1.4189247311827957) internal successors, (3299), 2325 states have internal predecessors, (3299), 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) [2022-11-25 23:19:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 3299 transitions. [2022-11-25 23:19:43,310 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 3299 transitions. Word has length 44 [2022-11-25 23:19:43,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:43,310 INFO L495 AbstractCegarLoop]: Abstraction has 2326 states and 3299 transitions. [2022-11-25 23:19:43,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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) [2022-11-25 23:19:43,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 3299 transitions. [2022-11-25 23:19:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 23:19:43,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:43,312 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] [2022-11-25 23:19:43,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:19:43,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:43,313 INFO L85 PathProgramCache]: Analyzing trace with hash 17210783, now seen corresponding path program 1 times [2022-11-25 23:19:43,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:43,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401652822] [2022-11-25 23:19:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:43,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:19:43,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:43,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401652822] [2022-11-25 23:19:43,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401652822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:19:43,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:19:43,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 23:19:43,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016902889] [2022-11-25 23:19:43,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:19:43,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 23:19:43,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:43,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 23:19:43,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:19:43,764 INFO L87 Difference]: Start difference. First operand 2326 states and 3299 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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) [2022-11-25 23:19:45,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:45,237 INFO L93 Difference]: Finished difference Result 4009 states and 5726 transitions. [2022-11-25 23:19:45,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:19:45,238 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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 [2022-11-25 23:19:45,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:45,250 INFO L225 Difference]: With dead ends: 4009 [2022-11-25 23:19:45,251 INFO L226 Difference]: Without dead ends: 3558 [2022-11-25 23:19:45,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:19:45,253 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 1091 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:45,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 926 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:19:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2022-11-25 23:19:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 2862. [2022-11-25 23:19:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 1.411744145403705) internal successors, (4039), 2861 states have internal predecessors, (4039), 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) [2022-11-25 23:19:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 4039 transitions. [2022-11-25 23:19:45,870 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 4039 transitions. Word has length 44 [2022-11-25 23:19:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:45,870 INFO L495 AbstractCegarLoop]: Abstraction has 2862 states and 4039 transitions. [2022-11-25 23:19:45,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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) [2022-11-25 23:19:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 4039 transitions. [2022-11-25 23:19:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 23:19:45,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:45,872 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] [2022-11-25 23:19:45,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 23:19:45,872 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:45,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1473188223, now seen corresponding path program 1 times [2022-11-25 23:19:45,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:45,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138188454] [2022-11-25 23:19:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:45,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:19:46,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:46,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138188454] [2022-11-25 23:19:46,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138188454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:19:46,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:19:46,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 23:19:46,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423792425] [2022-11-25 23:19:46,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:19:46,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 23:19:46,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:46,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 23:19:46,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:19:46,377 INFO L87 Difference]: Start difference. First operand 2862 states and 4039 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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) [2022-11-25 23:19:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:48,060 INFO L93 Difference]: Finished difference Result 4485 states and 6341 transitions. [2022-11-25 23:19:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:19:48,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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 [2022-11-25 23:19:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:48,077 INFO L225 Difference]: With dead ends: 4485 [2022-11-25 23:19:48,077 INFO L226 Difference]: Without dead ends: 4332 [2022-11-25 23:19:48,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:19:48,080 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 988 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:48,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 998 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:19:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2022-11-25 23:19:48,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3283. [2022-11-25 23:19:48,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3283 states, 3282 states have (on average 1.408897014015844) internal successors, (4624), 3282 states have internal predecessors, (4624), 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) [2022-11-25 23:19:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3283 states to 3283 states and 4624 transitions. [2022-11-25 23:19:48,755 INFO L78 Accepts]: Start accepts. Automaton has 3283 states and 4624 transitions. Word has length 44 [2022-11-25 23:19:48,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:48,755 INFO L495 AbstractCegarLoop]: Abstraction has 3283 states and 4624 transitions. [2022-11-25 23:19:48,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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) [2022-11-25 23:19:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3283 states and 4624 transitions. [2022-11-25 23:19:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 23:19:48,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:48,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:19:48,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 23:19:48,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:48,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1321244211, now seen corresponding path program 1 times [2022-11-25 23:19:48,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:48,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169843850] [2022-11-25 23:19:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:48,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:19:49,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:49,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169843850] [2022-11-25 23:19:49,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169843850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:19:49,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:19:49,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 23:19:49,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380242740] [2022-11-25 23:19:49,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:19:49,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:19:49,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:49,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:19:49,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:19:49,290 INFO L87 Difference]: Start difference. First operand 3283 states and 4624 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2022-11-25 23:19:51,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:51,454 INFO L93 Difference]: Finished difference Result 7672 states and 10846 transitions. [2022-11-25 23:19:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:19:51,454 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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 46 [2022-11-25 23:19:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:51,481 INFO L225 Difference]: With dead ends: 7672 [2022-11-25 23:19:51,481 INFO L226 Difference]: Without dead ends: 6794 [2022-11-25 23:19:51,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:19:51,485 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 479 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:51,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 1520 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:19:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6794 states. [2022-11-25 23:19:52,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6794 to 4525. [2022-11-25 23:19:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4525 states, 4524 states have (on average 1.4140141467727674) internal successors, (6397), 4524 states have internal predecessors, (6397), 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) [2022-11-25 23:19:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4525 states to 4525 states and 6397 transitions. [2022-11-25 23:19:52,396 INFO L78 Accepts]: Start accepts. Automaton has 4525 states and 6397 transitions. Word has length 46 [2022-11-25 23:19:52,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:52,397 INFO L495 AbstractCegarLoop]: Abstraction has 4525 states and 6397 transitions. [2022-11-25 23:19:52,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2022-11-25 23:19:52,397 INFO L276 IsEmpty]: Start isEmpty. Operand 4525 states and 6397 transitions. [2022-11-25 23:19:52,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 23:19:52,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:52,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:19:52,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 23:19:52,399 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:52,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:52,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1517745645, now seen corresponding path program 1 times [2022-11-25 23:19:52,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:52,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20200044] [2022-11-25 23:19:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:52,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:19:52,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:52,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20200044] [2022-11-25 23:19:52,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20200044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:19:52,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:19:52,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 23:19:52,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904127675] [2022-11-25 23:19:52,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:19:52,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:19:52,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:52,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:19:52,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:19:52,927 INFO L87 Difference]: Start difference. First operand 4525 states and 6397 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2022-11-25 23:19:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:54,757 INFO L93 Difference]: Finished difference Result 6870 states and 9702 transitions. [2022-11-25 23:19:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 23:19:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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 46 [2022-11-25 23:19:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:54,784 INFO L225 Difference]: With dead ends: 6870 [2022-11-25 23:19:54,784 INFO L226 Difference]: Without dead ends: 6212 [2022-11-25 23:19:54,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:19:54,787 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 392 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:54,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 959 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:19:54,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2022-11-25 23:19:55,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 4552. [2022-11-25 23:19:55,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4552 states, 4551 states have (on average 1.4115578993627773) internal successors, (6424), 4551 states have internal predecessors, (6424), 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) [2022-11-25 23:19:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4552 states to 4552 states and 6424 transitions. [2022-11-25 23:19:55,760 INFO L78 Accepts]: Start accepts. Automaton has 4552 states and 6424 transitions. Word has length 46 [2022-11-25 23:19:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:55,761 INFO L495 AbstractCegarLoop]: Abstraction has 4552 states and 6424 transitions. [2022-11-25 23:19:55,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2022-11-25 23:19:55,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4552 states and 6424 transitions. [2022-11-25 23:19:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 23:19:55,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:55,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:19:55,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 23:19:55,763 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:55,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:55,763 INFO L85 PathProgramCache]: Analyzing trace with hash -356991501, now seen corresponding path program 1 times [2022-11-25 23:19:55,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:55,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80447871] [2022-11-25 23:19:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:55,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:19:56,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:56,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80447871] [2022-11-25 23:19:56,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80447871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:19:56,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:19:56,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 23:19:56,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742322643] [2022-11-25 23:19:56,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:19:56,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:19:56,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:56,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:19:56,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:19:56,277 INFO L87 Difference]: Start difference. First operand 4552 states and 6424 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2022-11-25 23:19:58,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:58,889 INFO L93 Difference]: Finished difference Result 8179 states and 11541 transitions. [2022-11-25 23:19:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:19:58,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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 46 [2022-11-25 23:19:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:58,918 INFO L225 Difference]: With dead ends: 8179 [2022-11-25 23:19:58,919 INFO L226 Difference]: Without dead ends: 8033 [2022-11-25 23:19:58,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:19:58,924 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 472 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:58,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1314 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:19:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8033 states. [2022-11-25 23:19:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8033 to 4555. [2022-11-25 23:19:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 1.4112867808519982) internal successors, (6427), 4554 states have internal predecessors, (6427), 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) [2022-11-25 23:19:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 6427 transitions. [2022-11-25 23:19:59,692 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 6427 transitions. Word has length 46 [2022-11-25 23:19:59,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:59,693 INFO L495 AbstractCegarLoop]: Abstraction has 4555 states and 6427 transitions. [2022-11-25 23:19:59,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2022-11-25 23:19:59,693 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 6427 transitions. [2022-11-25 23:19:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 23:19:59,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:59,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:19:59,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 23:19:59,695 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:59,696 INFO L85 PathProgramCache]: Analyzing trace with hash 663075271, now seen corresponding path program 1 times [2022-11-25 23:19:59,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:59,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128169934] [2022-11-25 23:19:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:59,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:19:59,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:59,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128169934] [2022-11-25 23:19:59,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128169934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:19:59,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:19:59,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:19:59,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591691655] [2022-11-25 23:19:59,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:19:59,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:19:59,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:59,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:19:59,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:19:59,748 INFO L87 Difference]: Start difference. First operand 4555 states and 6427 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-25 23:20:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:20:00,630 INFO L93 Difference]: Finished difference Result 8114 states and 11520 transitions. [2022-11-25 23:20:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:20:00,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2022-11-25 23:20:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:20:00,640 INFO L225 Difference]: With dead ends: 8114 [2022-11-25 23:20:00,640 INFO L226 Difference]: Without dead ends: 4265 [2022-11-25 23:20:00,648 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 [2022-11-25 23:20:00,648 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 83 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:20:00,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 260 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:20:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4265 states. [2022-11-25 23:20:01,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4265 to 4261. [2022-11-25 23:20:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4261 states, 4260 states have (on average 1.4105633802816901) internal successors, (6009), 4260 states have internal predecessors, (6009), 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) [2022-11-25 23:20:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4261 states to 4261 states and 6009 transitions. [2022-11-25 23:20:01,341 INFO L78 Accepts]: Start accepts. Automaton has 4261 states and 6009 transitions. Word has length 47 [2022-11-25 23:20:01,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:20:01,341 INFO L495 AbstractCegarLoop]: Abstraction has 4261 states and 6009 transitions. [2022-11-25 23:20:01,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-25 23:20:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4261 states and 6009 transitions. [2022-11-25 23:20:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 23:20:01,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:20:01,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:20:01,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 23:20:01,344 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:20:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:20:01,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2091887612, now seen corresponding path program 1 times [2022-11-25 23:20:01,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:20:01,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185487991] [2022-11-25 23:20:01,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:20:01,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:20:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:20:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:20:01,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:20:01,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185487991] [2022-11-25 23:20:01,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185487991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:20:01,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:20:01,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:20:01,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101033552] [2022-11-25 23:20:01,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:20:01,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:20:01,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:20:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:20:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:20:01,396 INFO L87 Difference]: Start difference. First operand 4261 states and 6009 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-25 23:20:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:20:02,116 INFO L93 Difference]: Finished difference Result 7555 states and 10705 transitions. [2022-11-25 23:20:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:20:02,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2022-11-25 23:20:02,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:20:02,125 INFO L225 Difference]: With dead ends: 7555 [2022-11-25 23:20:02,126 INFO L226 Difference]: Without dead ends: 4028 [2022-11-25 23:20:02,131 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 [2022-11-25 23:20:02,131 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 76 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:20:02,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 260 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:20:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4028 states. [2022-11-25 23:20:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4028 to 3934. [2022-11-25 23:20:02,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3934 states, 3933 states have (on average 1.4078311721332317) internal successors, (5537), 3933 states have internal predecessors, (5537), 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) [2022-11-25 23:20:02,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3934 states to 3934 states and 5537 transitions. [2022-11-25 23:20:02,729 INFO L78 Accepts]: Start accepts. Automaton has 3934 states and 5537 transitions. Word has length 47 [2022-11-25 23:20:02,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:20:02,729 INFO L495 AbstractCegarLoop]: Abstraction has 3934 states and 5537 transitions. [2022-11-25 23:20:02,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-25 23:20:02,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3934 states and 5537 transitions. [2022-11-25 23:20:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 23:20:02,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:20:02,730 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] [2022-11-25 23:20:02,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 23:20:02,731 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:20:02,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:20:02,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1311317625, now seen corresponding path program 1 times [2022-11-25 23:20:02,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:20:02,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130541059] [2022-11-25 23:20:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:20:02,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:20:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:20:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:20:07,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:20:07,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130541059] [2022-11-25 23:20:07,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130541059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:20:07,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:20:07,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-25 23:20:07,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411564395] [2022-11-25 23:20:07,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:20:07,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 23:20:07,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:20:07,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 23:20:07,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:20:07,684 INFO L87 Difference]: Start difference. First operand 3934 states and 5537 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 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) [2022-11-25 23:20:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:20:16,609 INFO L93 Difference]: Finished difference Result 5869 states and 8247 transitions. [2022-11-25 23:20:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 23:20:16,609 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 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 48 [2022-11-25 23:20:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:20:16,620 INFO L225 Difference]: With dead ends: 5869 [2022-11-25 23:20:16,620 INFO L226 Difference]: Without dead ends: 5163 [2022-11-25 23:20:16,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=616, Invalid=1834, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 23:20:16,624 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 526 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:20:16,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1195 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 23:20:16,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5163 states. [2022-11-25 23:20:17,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5163 to 3912. [2022-11-25 23:20:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 1.4093582204039887) internal successors, (5512), 3911 states have internal predecessors, (5512), 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) [2022-11-25 23:20:17,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 5512 transitions. [2022-11-25 23:20:17,322 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 5512 transitions. Word has length 48 [2022-11-25 23:20:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:20:17,322 INFO L495 AbstractCegarLoop]: Abstraction has 3912 states and 5512 transitions. [2022-11-25 23:20:17,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 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) [2022-11-25 23:20:17,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 5512 transitions. [2022-11-25 23:20:17,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 23:20:17,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:20:17,324 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] [2022-11-25 23:20:17,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 23:20:17,325 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:20:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:20:17,325 INFO L85 PathProgramCache]: Analyzing trace with hash 650779773, now seen corresponding path program 1 times [2022-11-25 23:20:17,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:20:17,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147201942] [2022-11-25 23:20:17,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:20:17,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:20:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:20:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:20:17,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:20:17,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147201942] [2022-11-25 23:20:17,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147201942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:20:17,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:20:17,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:20:17,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46076537] [2022-11-25 23:20:17,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:20:17,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:20:17,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:20:17,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:20:17,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:20:17,463 INFO L87 Difference]: Start difference. First operand 3912 states and 5512 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-11-25 23:20:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:20:18,549 INFO L93 Difference]: Finished difference Result 7531 states and 10654 transitions. [2022-11-25 23:20:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:20:18,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2022-11-25 23:20:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:20:18,560 INFO L225 Difference]: With dead ends: 7531 [2022-11-25 23:20:18,560 INFO L226 Difference]: Without dead ends: 4774 [2022-11-25 23:20:18,565 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 [2022-11-25 23:20:18,566 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 79 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:20:18,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 285 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:20:18,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4774 states. [2022-11-25 23:20:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4774 to 4430. [2022-11-25 23:20:19,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 4429 states have (on average 1.400090313840596) internal successors, (6201), 4429 states have internal predecessors, (6201), 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) [2022-11-25 23:20:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 6201 transitions. [2022-11-25 23:20:19,558 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 6201 transitions. Word has length 52 [2022-11-25 23:20:19,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:20:19,558 INFO L495 AbstractCegarLoop]: Abstraction has 4430 states and 6201 transitions. [2022-11-25 23:20:19,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-11-25 23:20:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 6201 transitions. [2022-11-25 23:20:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 23:20:19,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:20:19,560 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] [2022-11-25 23:20:19,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 23:20:19,560 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:20:19,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:20:19,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1495665432, now seen corresponding path program 1 times [2022-11-25 23:20:19,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:20:19,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153150245] [2022-11-25 23:20:19,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:20:19,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:20:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:20:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:20:19,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:20:19,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153150245] [2022-11-25 23:20:19,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153150245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:20:19,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:20:19,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:20:19,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389078711] [2022-11-25 23:20:19,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:20:19,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:20:19,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:20:19,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:20:19,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:20:19,616 INFO L87 Difference]: Start difference. First operand 4430 states and 6201 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2022-11-25 23:20:20,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:20:20,366 INFO L93 Difference]: Finished difference Result 7276 states and 10190 transitions. [2022-11-25 23:20:20,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:20:20,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 55 [2022-11-25 23:20:20,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:20:20,376 INFO L225 Difference]: With dead ends: 7276 [2022-11-25 23:20:20,376 INFO L226 Difference]: Without dead ends: 3781 [2022-11-25 23:20:20,382 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 [2022-11-25 23:20:20,383 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 70 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:20:20,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 289 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:20:20,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2022-11-25 23:20:21,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 3779. [2022-11-25 23:20:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3779 states, 3778 states have (on average 1.3795659078877713) internal successors, (5212), 3778 states have internal predecessors, (5212), 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) [2022-11-25 23:20:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 5212 transitions. [2022-11-25 23:20:21,209 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 5212 transitions. Word has length 55 [2022-11-25 23:20:21,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:20:21,210 INFO L495 AbstractCegarLoop]: Abstraction has 3779 states and 5212 transitions. [2022-11-25 23:20:21,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2022-11-25 23:20:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 5212 transitions. [2022-11-25 23:20:21,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 23:20:21,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:20:21,217 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] [2022-11-25 23:20:21,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 23:20:21,217 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:20:21,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:20:21,218 INFO L85 PathProgramCache]: Analyzing trace with hash -521757432, now seen corresponding path program 1 times [2022-11-25 23:20:21,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:20:21,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802321440] [2022-11-25 23:20:21,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:20:21,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:20:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:20:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:20:21,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:20:21,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802321440] [2022-11-25 23:20:21,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802321440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:20:21,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:20:21,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:20:21,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753757578] [2022-11-25 23:20:21,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:20:21,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:20:21,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:20:21,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:20:21,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:20:21,314 INFO L87 Difference]: Start difference. First operand 3779 states and 5212 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2022-11-25 23:20:22,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:20:22,302 INFO L93 Difference]: Finished difference Result 8373 states and 11630 transitions. [2022-11-25 23:20:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:20:22,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 55 [2022-11-25 23:20:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:20:22,310 INFO L225 Difference]: With dead ends: 8373 [2022-11-25 23:20:22,310 INFO L226 Difference]: Without dead ends: 5304 [2022-11-25 23:20:22,316 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 [2022-11-25 23:20:22,316 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 75 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 268 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 [2022-11-25 23:20:22,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 268 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:20:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5304 states. [2022-11-25 23:20:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5304 to 4703. [2022-11-25 23:20:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 1.365801786473841) internal successors, (6422), 4702 states have internal predecessors, (6422), 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) [2022-11-25 23:20:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 6422 transitions. [2022-11-25 23:20:23,636 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 6422 transitions. Word has length 55 [2022-11-25 23:20:23,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:20:23,636 INFO L495 AbstractCegarLoop]: Abstraction has 4703 states and 6422 transitions. [2022-11-25 23:20:23,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2022-11-25 23:20:23,637 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 6422 transitions. [2022-11-25 23:20:23,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-25 23:20:23,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:20:23,638 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] [2022-11-25 23:20:23,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 23:20:23,639 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:20:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:20:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash 109988161, now seen corresponding path program 1 times [2022-11-25 23:20:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:20:23,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370976882] [2022-11-25 23:20:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:20:23,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:20:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:20:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:20:23,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:20:23,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370976882] [2022-11-25 23:20:23,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370976882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:20:23,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:20:23,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:20:23,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295993858] [2022-11-25 23:20:23,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:20:23,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:20:23,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:20:23,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:20:23,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:20:23,704 INFO L87 Difference]: Start difference. First operand 4703 states and 6422 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-25 23:20:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:20:25,094 INFO L93 Difference]: Finished difference Result 6995 states and 9557 transitions. [2022-11-25 23:20:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:20:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2022-11-25 23:20:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:20:25,101 INFO L225 Difference]: With dead ends: 6995 [2022-11-25 23:20:25,101 INFO L226 Difference]: Without dead ends: 4971 [2022-11-25 23:20:25,104 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 [2022-11-25 23:20:25,104 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 71 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:20:25,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 302 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:20:25,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4971 states. [2022-11-25 23:20:26,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4971 to 4969. [2022-11-25 23:20:26,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4969 states, 4968 states have (on average 1.3526570048309179) internal successors, (6720), 4968 states have internal predecessors, (6720), 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) [2022-11-25 23:20:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4969 states to 4969 states and 6720 transitions. [2022-11-25 23:20:26,266 INFO L78 Accepts]: Start accepts. Automaton has 4969 states and 6720 transitions. Word has length 58 [2022-11-25 23:20:26,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:20:26,267 INFO L495 AbstractCegarLoop]: Abstraction has 4969 states and 6720 transitions. [2022-11-25 23:20:26,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-25 23:20:26,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4969 states and 6720 transitions. [2022-11-25 23:20:26,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-25 23:20:26,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:20:26,269 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] [2022-11-25 23:20:26,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 23:20:26,269 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:20:26,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:20:26,270 INFO L85 PathProgramCache]: Analyzing trace with hash 269382945, now seen corresponding path program 1 times [2022-11-25 23:20:26,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:20:26,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845652817] [2022-11-25 23:20:26,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:20:26,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:20:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:20:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:20:26,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:20:26,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845652817] [2022-11-25 23:20:26,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845652817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:20:26,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:20:26,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:20:26,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710917135] [2022-11-25 23:20:26,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:20:26,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:20:26,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:20:26,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:20:26,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:20:26,361 INFO L87 Difference]: Start difference. First operand 4969 states and 6720 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-25 23:20:27,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:20:27,859 INFO L93 Difference]: Finished difference Result 11809 states and 16064 transitions. [2022-11-25 23:20:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:20:27,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2022-11-25 23:20:27,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:20:27,872 INFO L225 Difference]: With dead ends: 11809 [2022-11-25 23:20:27,872 INFO L226 Difference]: Without dead ends: 7199 [2022-11-25 23:20:27,877 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 [2022-11-25 23:20:27,878 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 70 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 249 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 [2022-11-25 23:20:27,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 249 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:20:27,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7199 states. [2022-11-25 23:20:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7199 to 6525. [2022-11-25 23:20:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6525 states, 6524 states have (on average 1.3412017167381973) internal successors, (8750), 6524 states have internal predecessors, (8750), 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) [2022-11-25 23:20:29,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 8750 transitions. [2022-11-25 23:20:29,294 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 8750 transitions. Word has length 58 [2022-11-25 23:20:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:20:29,295 INFO L495 AbstractCegarLoop]: Abstraction has 6525 states and 8750 transitions. [2022-11-25 23:20:29,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-25 23:20:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 8750 transitions. [2022-11-25 23:20:29,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-25 23:20:29,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:20:29,297 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] [2022-11-25 23:20:29,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 23:20:29,298 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:20:29,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:20:29,298 INFO L85 PathProgramCache]: Analyzing trace with hash -963622959, now seen corresponding path program 1 times [2022-11-25 23:20:29,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:20:29,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418969189] [2022-11-25 23:20:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:20:29,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:20:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:20:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:20:29,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:20:29,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418969189] [2022-11-25 23:20:29,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418969189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:20:29,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:20:29,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:20:29,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797182762] [2022-11-25 23:20:29,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:20:29,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:20:29,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:20:29,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:20:29,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:20:29,565 INFO L87 Difference]: Start difference. First operand 6525 states and 8750 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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) [2022-11-25 23:20:32,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:20:32,125 INFO L93 Difference]: Finished difference Result 9076 states and 12095 transitions. [2022-11-25 23:20:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:20:32,126 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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 63 [2022-11-25 23:20:32,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:20:32,136 INFO L225 Difference]: With dead ends: 9076 [2022-11-25 23:20:32,136 INFO L226 Difference]: Without dead ends: 9074 [2022-11-25 23:20:32,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:20:32,138 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 312 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:20:32,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 723 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:20:32,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9074 states. [2022-11-25 23:20:33,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9074 to 7931. [2022-11-25 23:20:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 1.3359394703657) internal successors, (10594), 7930 states have internal predecessors, (10594), 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) [2022-11-25 23:20:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 10594 transitions. [2022-11-25 23:20:33,685 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 10594 transitions. Word has length 63 [2022-11-25 23:20:33,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:20:33,685 INFO L495 AbstractCegarLoop]: Abstraction has 7931 states and 10594 transitions. [2022-11-25 23:20:33,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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) [2022-11-25 23:20:33,686 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 10594 transitions. [2022-11-25 23:20:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 23:20:33,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:20:33,689 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:20:33,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 23:20:33,689 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:20:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:20:33,690 INFO L85 PathProgramCache]: Analyzing trace with hash -718661213, now seen corresponding path program 1 times [2022-11-25 23:20:33,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:20:33,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441954824] [2022-11-25 23:20:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:20:33,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:20:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:20:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:20:33,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:20:33,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441954824] [2022-11-25 23:20:33,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441954824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:20:33,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:20:33,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:20:33,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823637672] [2022-11-25 23:20:33,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:20:33,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:20:33,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:20:33,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:20:33,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:20:33,911 INFO L87 Difference]: Start difference. First operand 7931 states and 10594 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 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) [2022-11-25 23:20:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:20:37,032 INFO L93 Difference]: Finished difference Result 19136 states and 25626 transitions. [2022-11-25 23:20:37,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:20:37,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 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 71 [2022-11-25 23:20:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:20:37,046 INFO L225 Difference]: With dead ends: 19136 [2022-11-25 23:20:37,046 INFO L226 Difference]: Without dead ends: 11884 [2022-11-25 23:20:37,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:20:37,053 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 777 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:20:37,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 262 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:20:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11884 states. [2022-11-25 23:20:39,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11884 to 9115. [2022-11-25 23:20:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9115 states, 9114 states have (on average 1.3128154487601493) internal successors, (11965), 9114 states have internal predecessors, (11965), 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) [2022-11-25 23:20:39,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9115 states to 9115 states and 11965 transitions. [2022-11-25 23:20:39,086 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 11965 transitions. Word has length 71 [2022-11-25 23:20:39,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:20:39,086 INFO L495 AbstractCegarLoop]: Abstraction has 9115 states and 11965 transitions. [2022-11-25 23:20:39,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 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) [2022-11-25 23:20:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 11965 transitions. [2022-11-25 23:20:39,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 23:20:39,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:20:39,089 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:20:39,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 23:20:39,090 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:20:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:20:39,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1684113144, now seen corresponding path program 1 times [2022-11-25 23:20:39,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:20:39,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124930380] [2022-11-25 23:20:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:20:39,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:20:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:20:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:20:40,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:20:40,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124930380] [2022-11-25 23:20:40,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124930380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:20:40,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567138763] [2022-11-25 23:20:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:20:40,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:20:40,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:20:40,727 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:20:40,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:20:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:20:40,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 23:20:40,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:20:43,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:20:43,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:20:43,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567138763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:20:43,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:20:43,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [20] total 34 [2022-11-25 23:20:43,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997885882] [2022-11-25 23:20:43,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:20:43,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 23:20:43,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:20:43,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 23:20:43,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 23:20:43,021 INFO L87 Difference]: Start difference. First operand 9115 states and 11965 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 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) [2022-11-25 23:20:49,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:20:49,529 INFO L93 Difference]: Finished difference Result 17757 states and 23342 transitions. [2022-11-25 23:20:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 23:20:49,530 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 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 71 [2022-11-25 23:20:49,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:20:49,548 INFO L225 Difference]: With dead ends: 17757 [2022-11-25 23:20:49,548 INFO L226 Difference]: Without dead ends: 13610 [2022-11-25 23:20:49,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=344, Invalid=2008, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 23:20:49,556 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 1700 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:20:49,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1700 Valid, 927 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 23:20:49,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13610 states. [2022-11-25 23:20:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13610 to 10308. [2022-11-25 23:20:52,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10308 states, 10307 states have (on average 1.3107596778888135) internal successors, (13510), 10307 states have internal predecessors, (13510), 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) [2022-11-25 23:20:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10308 states to 10308 states and 13510 transitions. [2022-11-25 23:20:52,208 INFO L78 Accepts]: Start accepts. Automaton has 10308 states and 13510 transitions. Word has length 71 [2022-11-25 23:20:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:20:52,209 INFO L495 AbstractCegarLoop]: Abstraction has 10308 states and 13510 transitions. [2022-11-25 23:20:52,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 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) [2022-11-25 23:20:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 10308 states and 13510 transitions. [2022-11-25 23:20:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 23:20:52,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:20:52,212 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:20:52,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:20:52,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 23:20:52,421 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:20:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:20:52,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1154891663, now seen corresponding path program 1 times [2022-11-25 23:20:52,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:20:52,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4497186] [2022-11-25 23:20:52,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:20:52,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:20:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:20:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:20:52,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:20:52,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4497186] [2022-11-25 23:20:52,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4497186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:20:52,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:20:52,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:20:52,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004153879] [2022-11-25 23:20:52,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:20:52,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:20:52,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:20:52,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:20:52,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:20:52,658 INFO L87 Difference]: Start difference. First operand 10308 states and 13510 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 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) [2022-11-25 23:20:58,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:20:58,300 INFO L93 Difference]: Finished difference Result 26021 states and 34285 transitions. [2022-11-25 23:20:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:20:58,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 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 71 [2022-11-25 23:20:58,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:20:58,327 INFO L225 Difference]: With dead ends: 26021 [2022-11-25 23:20:58,327 INFO L226 Difference]: Without dead ends: 18060 [2022-11-25 23:20:58,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:20:58,334 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 994 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:20:58,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 221 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:20:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18060 states. [2022-11-25 23:21:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18060 to 13328. [2022-11-25 23:21:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13328 states, 13327 states have (on average 1.2982666766714188) internal successors, (17302), 13327 states have internal predecessors, (17302), 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) [2022-11-25 23:21:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13328 states to 13328 states and 17302 transitions. [2022-11-25 23:21:03,244 INFO L78 Accepts]: Start accepts. Automaton has 13328 states and 17302 transitions. Word has length 71 [2022-11-25 23:21:03,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:03,245 INFO L495 AbstractCegarLoop]: Abstraction has 13328 states and 17302 transitions. [2022-11-25 23:21:03,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 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) [2022-11-25 23:21:03,245 INFO L276 IsEmpty]: Start isEmpty. Operand 13328 states and 17302 transitions. [2022-11-25 23:21:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 23:21:03,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:03,249 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:21:03,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 23:21:03,250 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:03,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:03,251 INFO L85 PathProgramCache]: Analyzing trace with hash -631859732, now seen corresponding path program 1 times [2022-11-25 23:21:03,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:03,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418065058] [2022-11-25 23:21:03,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:03,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:04,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:04,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418065058] [2022-11-25 23:21:04,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418065058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:04,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454423142] [2022-11-25 23:21:04,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:04,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:04,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:04,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:04,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:21:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:04,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-25 23:21:04,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:21:09,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:09,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454423142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:09,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:21:09,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [14] total 35 [2022-11-25 23:21:09,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391451609] [2022-11-25 23:21:09,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:09,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 23:21:09,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:09,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 23:21:09,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 23:21:09,457 INFO L87 Difference]: Start difference. First operand 13328 states and 17302 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 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) [2022-11-25 23:21:15,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:15,159 INFO L93 Difference]: Finished difference Result 17712 states and 23029 transitions. [2022-11-25 23:21:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 23:21:15,160 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 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 71 [2022-11-25 23:21:15,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:15,180 INFO L225 Difference]: With dead ends: 17712 [2022-11-25 23:21:15,180 INFO L226 Difference]: Without dead ends: 13342 [2022-11-25 23:21:15,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 23:21:15,188 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 225 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:15,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 495 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:21:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13342 states. [2022-11-25 23:21:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13342 to 13331. [2022-11-25 23:21:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13331 states, 13330 states have (on average 1.2981995498874719) internal successors, (17305), 13330 states have internal predecessors, (17305), 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) [2022-11-25 23:21:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13331 states to 13331 states and 17305 transitions. [2022-11-25 23:21:20,150 INFO L78 Accepts]: Start accepts. Automaton has 13331 states and 17305 transitions. Word has length 71 [2022-11-25 23:21:20,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:20,151 INFO L495 AbstractCegarLoop]: Abstraction has 13331 states and 17305 transitions. [2022-11-25 23:21:20,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 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) [2022-11-25 23:21:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 13331 states and 17305 transitions. [2022-11-25 23:21:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 23:21:20,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:20,154 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:21:20,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 23:21:20,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 23:21:20,361 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:20,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1064558264, now seen corresponding path program 1 times [2022-11-25 23:21:20,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:20,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765785340] [2022-11-25 23:21:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:20,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:21,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:21,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765785340] [2022-11-25 23:21:21,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765785340] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:21,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349148535] [2022-11-25 23:21:21,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:21,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:21,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:21,396 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:21,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:21:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:21,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 23:21:21,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:21:23,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:23,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349148535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:23,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:21:23,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 27 [2022-11-25 23:21:23,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943116682] [2022-11-25 23:21:23,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:23,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:21:23,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:23,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:21:23,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:21:23,049 INFO L87 Difference]: Start difference. First operand 13331 states and 17305 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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) [2022-11-25 23:21:29,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:29,117 INFO L93 Difference]: Finished difference Result 19614 states and 25632 transitions. [2022-11-25 23:21:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:21:29,117 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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 71 [2022-11-25 23:21:29,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:29,143 INFO L225 Difference]: With dead ends: 19614 [2022-11-25 23:21:29,143 INFO L226 Difference]: Without dead ends: 14841 [2022-11-25 23:21:29,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-11-25 23:21:29,150 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 409 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:29,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 706 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:21:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14841 states. [2022-11-25 23:21:33,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14841 to 14149. [2022-11-25 23:21:33,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14149 states, 14148 states have (on average 1.3021628498727735) internal successors, (18423), 14148 states have internal predecessors, (18423), 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) [2022-11-25 23:21:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14149 states to 14149 states and 18423 transitions. [2022-11-25 23:21:33,641 INFO L78 Accepts]: Start accepts. Automaton has 14149 states and 18423 transitions. Word has length 71 [2022-11-25 23:21:33,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:33,641 INFO L495 AbstractCegarLoop]: Abstraction has 14149 states and 18423 transitions. [2022-11-25 23:21:33,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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) [2022-11-25 23:21:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 14149 states and 18423 transitions. [2022-11-25 23:21:33,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 23:21:33,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:33,644 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:21:33,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 23:21:33,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:33,851 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:33,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:33,851 INFO L85 PathProgramCache]: Analyzing trace with hash 799527002, now seen corresponding path program 1 times [2022-11-25 23:21:33,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:33,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248532954] [2022-11-25 23:21:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:33,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:21:33,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:33,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248532954] [2022-11-25 23:21:33,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248532954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:33,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:21:33,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:21:33,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345281369] [2022-11-25 23:21:33,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:33,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:21:33,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:33,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:21:33,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:33,921 INFO L87 Difference]: Start difference. First operand 14149 states and 18423 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-11-25 23:21:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:38,681 INFO L93 Difference]: Finished difference Result 16408 states and 21329 transitions. [2022-11-25 23:21:38,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:21:38,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 73 [2022-11-25 23:21:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:38,702 INFO L225 Difference]: With dead ends: 16408 [2022-11-25 23:21:38,703 INFO L226 Difference]: Without dead ends: 13664 [2022-11-25 23:21:38,707 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 [2022-11-25 23:21:38,708 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 72 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:38,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 257 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:21:38,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13664 states. [2022-11-25 23:21:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13664 to 13575. [2022-11-25 23:21:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13575 states, 13574 states have (on average 1.2940179755414765) internal successors, (17565), 13574 states have internal predecessors, (17565), 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) [2022-11-25 23:21:43,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13575 states to 13575 states and 17565 transitions. [2022-11-25 23:21:43,399 INFO L78 Accepts]: Start accepts. Automaton has 13575 states and 17565 transitions. Word has length 73 [2022-11-25 23:21:43,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:43,399 INFO L495 AbstractCegarLoop]: Abstraction has 13575 states and 17565 transitions. [2022-11-25 23:21:43,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-11-25 23:21:43,399 INFO L276 IsEmpty]: Start isEmpty. Operand 13575 states and 17565 transitions. [2022-11-25 23:21:43,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 23:21:43,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:43,402 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:21:43,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 23:21:43,402 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:43,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:43,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1518939580, now seen corresponding path program 1 times [2022-11-25 23:21:43,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:43,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741678123] [2022-11-25 23:21:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:43,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:44,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:44,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741678123] [2022-11-25 23:21:44,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741678123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:44,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463367817] [2022-11-25 23:21:44,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:44,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:44,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:44,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:45,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee08fe65-9158-42f8-bc43-dd3277009535/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:21:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:45,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-25 23:21:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:53,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:25:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:25:40,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463367817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:25:40,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1063987062] [2022-11-25 23:25:40,904 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-25 23:25:40,905 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:25:40,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:25:40,914 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:25:40,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:25:41,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:41,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:41,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-25 23:25:41,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:41,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:41,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:41,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-25 23:25:52,356 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:26:37,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '591735#(and (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~2#1| 127) (or (not (<= (+ ~st3~0 ~st2~0 ~st1~0) 1)) (and (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)) (not (< (mod ~r1~0 256) 3)))) (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~2#1|) (<= 0 ~mode1~0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= ~__return_6326~0 1) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_3~0#1|) (<= 1 ~__return_6326~0) (<= 0 ~id1~0) (= |ULTIMATE.start_main_~check__tmp~1#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~2#1| 1)) (= ~p2~0 0) (<= 1 ~r1~0) (<= 0 ~mode3~0) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~1#1| 1)) (= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~send1~0 127) (<= ~st1~0 0) (= ~p3_new~0 ~nomsg~0) (= |ULTIMATE.start_main_~main__c1~0#1| ~__return_6532~0) (<= 0 (+ ~p3_old~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~2#1| 256) 0) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= ~r1~0 257) (<= 0 ~st2~0) (<= ~mode3~0 1) (= ~__return_6719~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (= ~nomsg~0 ~p2_new~0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= 1 ~__return_6404~0) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= ~__return_6404~0 1) (<= (+ |ULTIMATE.start_main_~node1__m1~2#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~1#1|) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= (+ |ULTIMATE.start_main_~node3__m3~1#1| 1) 0) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= 0 ~mode2~0) (<= (+ |ULTIMATE.start_main_~node1__m1~1#1| 1) 0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (<= ~id2~0 127) (<= 0 ~st3~0) (= |ULTIMATE.start_main_~assert__arg~2#1| |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~check__tmp~2#1| ~__return_6532~0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~1#1| 1)) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (<= 1 ~__return_6465~0) (<= ~__return_6465~0 1) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~__tmp_2~0#1|) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-11-25 23:26:37,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:26:37,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:26:37,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 28, 28] total 71 [2022-11-25 23:26:37,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393703997] [2022-11-25 23:26:37,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:26:37,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-25 23:26:37,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:26:37,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-25 23:26:37,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2263, Invalid=12989, Unknown=0, NotChecked=0, Total=15252 [2022-11-25 23:26:37,315 INFO L87 Difference]: Start difference. First operand 13575 states and 17565 transitions. Second operand has 71 states, 71 states have (on average 3.084507042253521) internal successors, (219), 71 states have internal predecessors, (219), 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) [2022-11-25 23:26:43,114 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 396 DAG size of output: 310 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:26:52,108 WARN L233 SmtUtils]: Spent 8.59s on a formula simplification. DAG size of input: 397 DAG size of output: 276 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:28:06,682 WARN L233 SmtUtils]: Spent 13.86s on a formula simplification. DAG size of input: 702 DAG size of output: 562 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:28:15,009 WARN L233 SmtUtils]: Spent 7.85s on a formula simplification. DAG size of input: 618 DAG size of output: 514 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:28:24,853 WARN L233 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 420 DAG size of output: 331 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:28:40,733 WARN L233 SmtUtils]: Spent 12.53s on a formula simplification. DAG size of input: 646 DAG size of output: 527 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:28:59,180 WARN L233 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 512 DAG size of output: 426 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:29:11,887 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 484 DAG size of output: 468 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:29:22,424 WARN L233 SmtUtils]: Spent 7.53s on a formula simplification. DAG size of input: 406 DAG size of output: 381 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:29:31,142 WARN L233 SmtUtils]: Spent 7.86s on a formula simplification. DAG size of input: 549 DAG size of output: 525 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:29:42,111 WARN L233 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 474 DAG size of output: 452 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:30:23,930 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 481 DAG size of output: 379 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:30:35,293 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 455 DAG size of output: 440 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:30:46,174 WARN L233 SmtUtils]: Spent 8.57s on a formula simplification. DAG size of input: 466 DAG size of output: 425 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:31:06,005 WARN L233 SmtUtils]: Spent 7.28s on a formula simplification. DAG size of input: 408 DAG size of output: 383 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:31:15,232 WARN L233 SmtUtils]: Spent 8.70s on a formula simplification. DAG size of input: 459 DAG size of output: 434 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:31:29,685 WARN L233 SmtUtils]: Spent 13.04s on a formula simplification. DAG size of input: 619 DAG size of output: 582 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:32:17,626 WARN L233 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 500 DAG size of output: 478 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:32:29,181 WARN L233 SmtUtils]: Spent 11.02s on a formula simplification. DAG size of input: 620 DAG size of output: 495 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:32:51,841 WARN L233 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 497 DAG size of output: 405 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:32:57,625 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 405 DAG size of output: 294 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)