./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e1221f43edcd55fb28cc2c33b3cd78828237d81c097e561fccaa486cdd56e141 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:29:56,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:29:56,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:29:56,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:29:56,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:29:56,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:29:56,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:29:56,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:29:56,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:29:56,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:29:56,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:29:56,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:29:56,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:29:56,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:29:56,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:29:56,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:29:56,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:29:56,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:29:56,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:29:56,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:29:56,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:29:56,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:29:56,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:29:56,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:29:56,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:29:56,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:29:56,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:29:56,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:29:56,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:29:56,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:29:56,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:29:56,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:29:56,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:29:56,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:29:56,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:29:56,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:29:56,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:29:56,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:29:56,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:29:56,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:29:56,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:29:56,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:29:56,170 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:29:56,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:29:56,172 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:29:56,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:29:56,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:29:56,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:29:56,174 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:29:56,174 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:29:56,175 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:29:56,175 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:29:56,176 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:29:56,176 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:29:56,177 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:29:56,177 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:29:56,177 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:29:56,178 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:29:56,178 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:29:56,178 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:29:56,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:29:56,179 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:29:56,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:29:56,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:29:56,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:29:56,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:29:56,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:29:56,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:29:56,188 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:29:56,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:29:56,188 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:29:56,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:29:56,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:29:56,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:29:56,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:29:56,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:29:56,190 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:29:56,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:29:56,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:29:56,191 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:29:56,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:29:56,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:29:56,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:29:56,192 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_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1221f43edcd55fb28cc2c33b3cd78828237d81c097e561fccaa486cdd56e141 [2022-11-03 02:29:56,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:29:56,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:29:56,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:29:56,494 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:29:56,495 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:29:56,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-03 02:29:56,571 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/data/7d543b6c3/6cc545e00360427781f356bac77df149/FLAG60d4acd32 [2022-11-03 02:29:57,047 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:29:57,048 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-03 02:29:57,060 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/data/7d543b6c3/6cc545e00360427781f356bac77df149/FLAG60d4acd32 [2022-11-03 02:29:57,382 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/data/7d543b6c3/6cc545e00360427781f356bac77df149 [2022-11-03 02:29:57,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:29:57,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:29:57,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:29:57,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:29:57,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:29:57,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72acce51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57, skipping insertion in model container [2022-11-03 02:29:57,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:29:57,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:29:57,778 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2022-11-03 02:29:57,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:29:57,871 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:29:57,917 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2022-11-03 02:29:57,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:29:57,968 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:29:57,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57 WrapperNode [2022-11-03 02:29:57,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:29:57,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:29:57,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:29:57,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:29:57,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:58,027 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 636 [2022-11-03 02:29:58,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:29:58,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:29:58,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:29:58,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:29:58,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:58,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:58,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:58,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:58,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:58,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:58,058 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:58,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:58,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:29:58,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:29:58,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:29:58,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:29:58,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:58,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:29:58,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:58,110 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:29:58,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:29:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:29:58,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:29:58,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:29:58,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:29:58,275 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:29:58,277 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:29:59,000 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:29:59,253 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:29:59,253 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:29:59,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:29:59 BoogieIcfgContainer [2022-11-03 02:29:59,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:29:59,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:29:59,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:29:59,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:29:59,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:29:57" (1/3) ... [2022-11-03 02:29:59,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595cbe2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:29:59, skipping insertion in model container [2022-11-03 02:29:59,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (2/3) ... [2022-11-03 02:29:59,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595cbe2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:29:59, skipping insertion in model container [2022-11-03 02:29:59,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:29:59" (3/3) ... [2022-11-03 02:29:59,269 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-03 02:29:59,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:29:59,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:29:59,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:29:59,379 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;@2f092812, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:29:59,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:29:59,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 120 states have (on average 1.7083333333333333) internal successors, (205), 121 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:29:59,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:59,404 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] [2022-11-03 02:29:59,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1610179573, now seen corresponding path program 1 times [2022-11-03 02:29:59,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:59,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819663683] [2022-11-03 02:29:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:59,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:00,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:00,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819663683] [2022-11-03 02:30:00,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819663683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:00,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:00,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:30:00,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547936321] [2022-11-03 02:30:00,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:00,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:30:00,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:00,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:30:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:30:00,156 INFO L87 Difference]: Start difference. First operand has 122 states, 120 states have (on average 1.7083333333333333) internal successors, (205), 121 states have internal predecessors, (205), 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 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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) [2022-11-03 02:30:00,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:00,490 INFO L93 Difference]: Finished difference Result 371 states and 594 transitions. [2022-11-03 02:30:00,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:30:00,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 [2022-11-03 02:30:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:00,508 INFO L225 Difference]: With dead ends: 371 [2022-11-03 02:30:00,508 INFO L226 Difference]: Without dead ends: 296 [2022-11-03 02:30:00,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:30:00,516 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 474 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:00,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 717 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:30:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-03 02:30:00,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 290. [2022-11-03 02:30:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.3840830449826989) internal successors, (400), 289 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 400 transitions. [2022-11-03 02:30:00,624 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 400 transitions. Word has length 52 [2022-11-03 02:30:00,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:00,624 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 400 transitions. [2022-11-03 02:30:00,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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) [2022-11-03 02:30:00,625 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 400 transitions. [2022-11-03 02:30:00,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:30:00,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:00,627 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] [2022-11-03 02:30:00,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:30:00,627 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:00,628 INFO L85 PathProgramCache]: Analyzing trace with hash 958515962, now seen corresponding path program 1 times [2022-11-03 02:30:00,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:00,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304779427] [2022-11-03 02:30:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:00,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:00,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:00,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304779427] [2022-11-03 02:30:00,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304779427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:00,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:00,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:30:00,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668113828] [2022-11-03 02:30:00,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:00,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:30:00,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:30:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:00,859 INFO L87 Difference]: Start difference. First operand 290 states and 400 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:01,184 INFO L93 Difference]: Finished difference Result 690 states and 982 transitions. [2022-11-03 02:30:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:30:01,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2022-11-03 02:30:01,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:01,189 INFO L225 Difference]: With dead ends: 690 [2022-11-03 02:30:01,189 INFO L226 Difference]: Without dead ends: 445 [2022-11-03 02:30:01,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:30:01,200 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 417 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:01,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 167 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:30:01,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-11-03 02:30:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 443. [2022-11-03 02:30:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.416289592760181) internal successors, (626), 442 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 626 transitions. [2022-11-03 02:30:01,318 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 626 transitions. Word has length 53 [2022-11-03 02:30:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:01,319 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 626 transitions. [2022-11-03 02:30:01,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 626 transitions. [2022-11-03 02:30:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:30:01,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:01,321 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] [2022-11-03 02:30:01,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:30:01,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:01,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:01,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1364861864, now seen corresponding path program 1 times [2022-11-03 02:30:01,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:01,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449308752] [2022-11-03 02:30:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:01,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:01,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:01,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449308752] [2022-11-03 02:30:01,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449308752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:01,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:01,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:30:01,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527414642] [2022-11-03 02:30:01,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:01,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:30:01,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:01,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:30:01,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:01,496 INFO L87 Difference]: Start difference. First operand 443 states and 626 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:01,875 INFO L93 Difference]: Finished difference Result 1099 states and 1596 transitions. [2022-11-03 02:30:01,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:30:01,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2022-11-03 02:30:01,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:01,879 INFO L225 Difference]: With dead ends: 1099 [2022-11-03 02:30:01,879 INFO L226 Difference]: Without dead ends: 751 [2022-11-03 02:30:01,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:30:01,881 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 389 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:01,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 183 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:30:01,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-03 02:30:02,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 749. [2022-11-03 02:30:02,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.4411764705882353) internal successors, (1078), 748 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1078 transitions. [2022-11-03 02:30:02,051 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1078 transitions. Word has length 53 [2022-11-03 02:30:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:02,053 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 1078 transitions. [2022-11-03 02:30:02,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1078 transitions. [2022-11-03 02:30:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:30:02,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:02,062 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] [2022-11-03 02:30:02,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:30:02,062 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:02,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:02,063 INFO L85 PathProgramCache]: Analyzing trace with hash -980512119, now seen corresponding path program 1 times [2022-11-03 02:30:02,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:02,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147243869] [2022-11-03 02:30:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:02,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:02,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:02,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147243869] [2022-11-03 02:30:02,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147243869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:02,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:02,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:30:02,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372753062] [2022-11-03 02:30:02,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:02,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:30:02,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:02,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:30:02,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:02,172 INFO L87 Difference]: Start difference. First operand 749 states and 1078 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:02,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:02,656 INFO L93 Difference]: Finished difference Result 2044 states and 2993 transitions. [2022-11-03 02:30:02,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:30:02,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2022-11-03 02:30:02,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:02,662 INFO L225 Difference]: With dead ends: 2044 [2022-11-03 02:30:02,662 INFO L226 Difference]: Without dead ends: 1363 [2022-11-03 02:30:02,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:30:02,672 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 394 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:02,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 175 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:30:02,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2022-11-03 02:30:02,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1361. [2022-11-03 02:30:02,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 1.451470588235294) internal successors, (1974), 1360 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1974 transitions. [2022-11-03 02:30:02,925 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1974 transitions. Word has length 53 [2022-11-03 02:30:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:02,926 INFO L495 AbstractCegarLoop]: Abstraction has 1361 states and 1974 transitions. [2022-11-03 02:30:02,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:02,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1974 transitions. [2022-11-03 02:30:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:30:02,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:02,927 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] [2022-11-03 02:30:02,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:30:02,927 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:02,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:02,928 INFO L85 PathProgramCache]: Analyzing trace with hash 625335487, now seen corresponding path program 1 times [2022-11-03 02:30:02,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:02,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713054723] [2022-11-03 02:30:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:02,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:04,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:04,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713054723] [2022-11-03 02:30:04,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713054723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:04,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:04,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-03 02:30:04,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45776825] [2022-11-03 02:30:04,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:04,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:30:04,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:04,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:30:04,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:30:04,363 INFO L87 Difference]: Start difference. First operand 1361 states and 1974 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:05,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:05,716 INFO L93 Difference]: Finished difference Result 2831 states and 4107 transitions. [2022-11-03 02:30:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:30:05,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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 54 [2022-11-03 02:30:05,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:05,728 INFO L225 Difference]: With dead ends: 2831 [2022-11-03 02:30:05,728 INFO L226 Difference]: Without dead ends: 2829 [2022-11-03 02:30:05,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:30:05,730 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 558 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:05,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1351 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:30:05,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2022-11-03 02:30:06,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2177. [2022-11-03 02:30:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 1.4494485294117647) internal successors, (3154), 2176 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 3154 transitions. [2022-11-03 02:30:06,186 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 3154 transitions. Word has length 54 [2022-11-03 02:30:06,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:06,187 INFO L495 AbstractCegarLoop]: Abstraction has 2177 states and 3154 transitions. [2022-11-03 02:30:06,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:06,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 3154 transitions. [2022-11-03 02:30:06,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:30:06,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:06,188 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] [2022-11-03 02:30:06,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:30:06,189 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:06,189 INFO L85 PathProgramCache]: Analyzing trace with hash 888282239, now seen corresponding path program 1 times [2022-11-03 02:30:06,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:06,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011109410] [2022-11-03 02:30:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:06,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:08,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:08,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011109410] [2022-11-03 02:30:08,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011109410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:08,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:08,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-03 02:30:08,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527455908] [2022-11-03 02:30:08,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:08,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:30:08,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:08,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:30:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:30:08,241 INFO L87 Difference]: Start difference. First operand 2177 states and 3154 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:10,697 INFO L93 Difference]: Finished difference Result 2517 states and 3635 transitions. [2022-11-03 02:30:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:30:10,698 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 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 54 [2022-11-03 02:30:10,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:10,707 INFO L225 Difference]: With dead ends: 2517 [2022-11-03 02:30:10,707 INFO L226 Difference]: Without dead ends: 2515 [2022-11-03 02:30:10,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:30:10,709 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 676 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:10,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 1279 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1699 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:30:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2022-11-03 02:30:11,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2196. [2022-11-03 02:30:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 1.4464692482915718) internal successors, (3175), 2195 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 3175 transitions. [2022-11-03 02:30:11,074 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 3175 transitions. Word has length 54 [2022-11-03 02:30:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:11,075 INFO L495 AbstractCegarLoop]: Abstraction has 2196 states and 3175 transitions. [2022-11-03 02:30:11,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 3175 transitions. [2022-11-03 02:30:11,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:30:11,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:11,077 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] [2022-11-03 02:30:11,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:30:11,077 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:11,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1661556895, now seen corresponding path program 1 times [2022-11-03 02:30:11,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:11,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431153432] [2022-11-03 02:30:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:11,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:12,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:12,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431153432] [2022-11-03 02:30:12,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431153432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:12,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:12,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-03 02:30:12,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720626482] [2022-11-03 02:30:12,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:12,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:30:12,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:12,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:30:12,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:30:12,230 INFO L87 Difference]: Start difference. First operand 2196 states and 3175 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:13,764 INFO L93 Difference]: Finished difference Result 3219 states and 4647 transitions. [2022-11-03 02:30:13,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:30:13,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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 54 [2022-11-03 02:30:13,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:13,775 INFO L225 Difference]: With dead ends: 3219 [2022-11-03 02:30:13,776 INFO L226 Difference]: Without dead ends: 2865 [2022-11-03 02:30:13,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:30:13,778 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 615 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:13,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1532 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:30:13,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2022-11-03 02:30:14,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2516. [2022-11-03 02:30:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2515 states have (on average 1.443737574552684) internal successors, (3631), 2515 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 3631 transitions. [2022-11-03 02:30:14,159 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 3631 transitions. Word has length 54 [2022-11-03 02:30:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:14,159 INFO L495 AbstractCegarLoop]: Abstraction has 2516 states and 3631 transitions. [2022-11-03 02:30:14,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:14,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 3631 transitions. [2022-11-03 02:30:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:30:14,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:14,161 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] [2022-11-03 02:30:14,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:30:14,161 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:14,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:14,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1653046243, now seen corresponding path program 1 times [2022-11-03 02:30:14,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:14,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391043382] [2022-11-03 02:30:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:14,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:14,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:14,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391043382] [2022-11-03 02:30:14,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391043382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:14,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:14,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:30:14,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479011341] [2022-11-03 02:30:14,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:14,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:30:14,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:30:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:14,251 INFO L87 Difference]: Start difference. First operand 2516 states and 3631 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:14,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:14,868 INFO L93 Difference]: Finished difference Result 3830 states and 5552 transitions. [2022-11-03 02:30:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:30:14,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2022-11-03 02:30:14,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:14,879 INFO L225 Difference]: With dead ends: 3830 [2022-11-03 02:30:14,880 INFO L226 Difference]: Without dead ends: 2516 [2022-11-03 02:30:14,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:30:14,886 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 339 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:14,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 130 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2022-11-03 02:30:15,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2516. [2022-11-03 02:30:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2515 states have (on average 1.4433399602385686) internal successors, (3630), 2515 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 3630 transitions. [2022-11-03 02:30:15,338 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 3630 transitions. Word has length 54 [2022-11-03 02:30:15,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:15,361 INFO L495 AbstractCegarLoop]: Abstraction has 2516 states and 3630 transitions. [2022-11-03 02:30:15,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:15,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 3630 transitions. [2022-11-03 02:30:15,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:30:15,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:15,362 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] [2022-11-03 02:30:15,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:30:15,363 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:15,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1947993939, now seen corresponding path program 1 times [2022-11-03 02:30:15,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:15,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981509704] [2022-11-03 02:30:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:15,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:16,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:16,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981509704] [2022-11-03 02:30:16,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981509704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:16,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:16,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-03 02:30:16,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911631804] [2022-11-03 02:30:16,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:16,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:30:16,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:16,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:30:16,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:30:16,387 INFO L87 Difference]: Start difference. First operand 2516 states and 3630 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2022-11-03 02:30:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:18,120 INFO L93 Difference]: Finished difference Result 4743 states and 6892 transitions. [2022-11-03 02:30:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:30:18,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 [2022-11-03 02:30:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:18,136 INFO L225 Difference]: With dead ends: 4743 [2022-11-03 02:30:18,136 INFO L226 Difference]: Without dead ends: 4741 [2022-11-03 02:30:18,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:30:18,139 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 466 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:18,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1341 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:30:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4741 states. [2022-11-03 02:30:18,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4741 to 2961. [2022-11-03 02:30:18,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2960 states have (on average 1.4469594594594595) internal successors, (4283), 2960 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 4283 transitions. [2022-11-03 02:30:18,730 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 4283 transitions. Word has length 55 [2022-11-03 02:30:18,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:18,731 INFO L495 AbstractCegarLoop]: Abstraction has 2961 states and 4283 transitions. [2022-11-03 02:30:18,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2022-11-03 02:30:18,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 4283 transitions. [2022-11-03 02:30:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:30:18,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:18,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:18,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:30:18,733 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:18,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1734606899, now seen corresponding path program 1 times [2022-11-03 02:30:18,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:18,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130737107] [2022-11-03 02:30:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:18,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:19,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:19,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130737107] [2022-11-03 02:30:19,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130737107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:19,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:19,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-03 02:30:19,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976404225] [2022-11-03 02:30:19,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:19,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:30:19,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:19,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:30:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:30:19,780 INFO L87 Difference]: Start difference. First operand 2961 states and 4283 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:21,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:21,358 INFO L93 Difference]: Finished difference Result 5228 states and 7569 transitions. [2022-11-03 02:30:21,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:30:21,359 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-03 02:30:21,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:21,373 INFO L225 Difference]: With dead ends: 5228 [2022-11-03 02:30:21,373 INFO L226 Difference]: Without dead ends: 5226 [2022-11-03 02:30:21,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:30:21,376 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 590 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:21,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 1422 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:30:21,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2022-11-03 02:30:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 2963. [2022-11-03 02:30:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2962 states have (on average 1.4463200540175558) internal successors, (4284), 2962 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4284 transitions. [2022-11-03 02:30:21,812 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4284 transitions. Word has length 56 [2022-11-03 02:30:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:21,812 INFO L495 AbstractCegarLoop]: Abstraction has 2963 states and 4284 transitions. [2022-11-03 02:30:21,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4284 transitions. [2022-11-03 02:30:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:30:21,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:21,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:21,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:30:21,814 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:21,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:21,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1787085741, now seen corresponding path program 1 times [2022-11-03 02:30:21,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:21,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508091088] [2022-11-03 02:30:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:21,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:22,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:22,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508091088] [2022-11-03 02:30:22,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508091088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:22,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:22,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-03 02:30:22,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114560016] [2022-11-03 02:30:22,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:22,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:30:22,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:22,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:30:22,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:30:22,909 INFO L87 Difference]: Start difference. First operand 2963 states and 4284 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:24,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:24,700 INFO L93 Difference]: Finished difference Result 3996 states and 5768 transitions. [2022-11-03 02:30:24,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:30:24,700 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-03 02:30:24,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:24,714 INFO L225 Difference]: With dead ends: 3996 [2022-11-03 02:30:24,714 INFO L226 Difference]: Without dead ends: 3642 [2022-11-03 02:30:24,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:30:24,717 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 428 mSDsluCounter, 2254 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 2464 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:24,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 2464 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:30:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2022-11-03 02:30:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 2960. [2022-11-03 02:30:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2960 states, 2959 states have (on average 1.4464346062859075) internal successors, (4280), 2959 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 4280 transitions. [2022-11-03 02:30:25,212 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 4280 transitions. Word has length 56 [2022-11-03 02:30:25,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:25,213 INFO L495 AbstractCegarLoop]: Abstraction has 2960 states and 4280 transitions. [2022-11-03 02:30:25,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 4280 transitions. [2022-11-03 02:30:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:30:25,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:25,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:25,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:30:25,214 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:25,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:25,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1110967315, now seen corresponding path program 1 times [2022-11-03 02:30:25,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:25,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042769434] [2022-11-03 02:30:25,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:25,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:26,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:26,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042769434] [2022-11-03 02:30:26,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042769434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:26,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:26,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-03 02:30:26,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167462075] [2022-11-03 02:30:26,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:26,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:30:26,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:26,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:30:26,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:30:26,255 INFO L87 Difference]: Start difference. First operand 2960 states and 4280 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:27,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:27,651 INFO L93 Difference]: Finished difference Result 3509 states and 5048 transitions. [2022-11-03 02:30:27,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:30:27,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-03 02:30:27,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:27,659 INFO L225 Difference]: With dead ends: 3509 [2022-11-03 02:30:27,659 INFO L226 Difference]: Without dead ends: 3507 [2022-11-03 02:30:27,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:30:27,661 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 450 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:27,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 1458 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:30:27,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2022-11-03 02:30:28,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 2973. [2022-11-03 02:30:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2972 states have (on average 1.4454912516823688) internal successors, (4296), 2972 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:28,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 4296 transitions. [2022-11-03 02:30:28,182 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 4296 transitions. Word has length 56 [2022-11-03 02:30:28,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:28,182 INFO L495 AbstractCegarLoop]: Abstraction has 2973 states and 4296 transitions. [2022-11-03 02:30:28,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:28,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 4296 transitions. [2022-11-03 02:30:28,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:30:28,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:28,184 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] [2022-11-03 02:30:28,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:30:28,184 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:28,184 INFO L85 PathProgramCache]: Analyzing trace with hash -326994332, now seen corresponding path program 1 times [2022-11-03 02:30:28,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:28,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565884708] [2022-11-03 02:30:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:28,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:28,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:28,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565884708] [2022-11-03 02:30:28,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565884708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:28,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:28,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:30:28,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455947001] [2022-11-03 02:30:28,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:28,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:28,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:28,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:28,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:28,232 INFO L87 Difference]: Start difference. First operand 2973 states and 4296 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:28,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:28,719 INFO L93 Difference]: Finished difference Result 4928 states and 7165 transitions. [2022-11-03 02:30:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:28,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 57 [2022-11-03 02:30:28,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:28,726 INFO L225 Difference]: With dead ends: 4928 [2022-11-03 02:30:28,726 INFO L226 Difference]: Without dead ends: 2856 [2022-11-03 02:30:28,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:28,730 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 99 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:28,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 263 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2022-11-03 02:30:29,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2853. [2022-11-03 02:30:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 1.443899018232819) internal successors, (4118), 2852 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:29,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 4118 transitions. [2022-11-03 02:30:29,286 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 4118 transitions. Word has length 57 [2022-11-03 02:30:29,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:29,287 INFO L495 AbstractCegarLoop]: Abstraction has 2853 states and 4118 transitions. [2022-11-03 02:30:29,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:29,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 4118 transitions. [2022-11-03 02:30:29,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:30:29,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:29,288 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] [2022-11-03 02:30:29,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:30:29,288 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:29,288 INFO L85 PathProgramCache]: Analyzing trace with hash 646219041, now seen corresponding path program 1 times [2022-11-03 02:30:29,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:29,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664525974] [2022-11-03 02:30:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:29,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:29,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:29,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664525974] [2022-11-03 02:30:29,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664525974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:29,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:29,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:30:29,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208183264] [2022-11-03 02:30:29,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:29,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:29,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:29,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:29,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:29,331 INFO L87 Difference]: Start difference. First operand 2853 states and 4118 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:30,011 INFO L93 Difference]: Finished difference Result 5257 states and 7643 transitions. [2022-11-03 02:30:30,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:30,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 57 [2022-11-03 02:30:30,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:30,017 INFO L225 Difference]: With dead ends: 5257 [2022-11-03 02:30:30,018 INFO L226 Difference]: Without dead ends: 2761 [2022-11-03 02:30:30,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:30,021 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 92 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:30,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 263 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2022-11-03 02:30:30,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2737. [2022-11-03 02:30:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 1.4415204678362572) internal successors, (3944), 2736 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:30,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 3944 transitions. [2022-11-03 02:30:30,497 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 3944 transitions. Word has length 57 [2022-11-03 02:30:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:30,498 INFO L495 AbstractCegarLoop]: Abstraction has 2737 states and 3944 transitions. [2022-11-03 02:30:30,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 3944 transitions. [2022-11-03 02:30:30,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:30:30,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:30,499 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] [2022-11-03 02:30:30,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:30:30,499 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1891723039, now seen corresponding path program 1 times [2022-11-03 02:30:30,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:30,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816191738] [2022-11-03 02:30:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:30,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:31,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:31,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816191738] [2022-11-03 02:30:31,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816191738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:31,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:31,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-03 02:30:31,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193542585] [2022-11-03 02:30:31,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:31,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:30:31,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:31,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:30:31,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:30:31,571 INFO L87 Difference]: Start difference. First operand 2737 states and 3944 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:33,220 INFO L93 Difference]: Finished difference Result 4843 states and 6997 transitions. [2022-11-03 02:30:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:30:33,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 57 [2022-11-03 02:30:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:33,229 INFO L225 Difference]: With dead ends: 4843 [2022-11-03 02:30:33,229 INFO L226 Difference]: Without dead ends: 4841 [2022-11-03 02:30:33,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:30:33,232 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 400 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:33,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 1437 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:30:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4841 states. [2022-11-03 02:30:33,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4841 to 2727. [2022-11-03 02:30:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 1.4431401320616288) internal successors, (3934), 2726 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3934 transitions. [2022-11-03 02:30:33,909 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3934 transitions. Word has length 57 [2022-11-03 02:30:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:33,910 INFO L495 AbstractCegarLoop]: Abstraction has 2727 states and 3934 transitions. [2022-11-03 02:30:33,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3934 transitions. [2022-11-03 02:30:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:30:33,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:33,912 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] [2022-11-03 02:30:33,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:30:33,912 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:33,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1628776287, now seen corresponding path program 1 times [2022-11-03 02:30:33,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:33,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617960235] [2022-11-03 02:30:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:33,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:35,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:35,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617960235] [2022-11-03 02:30:35,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617960235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:35,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:35,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-03 02:30:35,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778775817] [2022-11-03 02:30:35,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:35,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:30:35,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:35,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:30:35,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:30:35,016 INFO L87 Difference]: Start difference. First operand 2727 states and 3934 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:36,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:36,917 INFO L93 Difference]: Finished difference Result 4538 states and 6544 transitions. [2022-11-03 02:30:36,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:30:36,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 57 [2022-11-03 02:30:36,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:36,927 INFO L225 Difference]: With dead ends: 4538 [2022-11-03 02:30:36,927 INFO L226 Difference]: Without dead ends: 4536 [2022-11-03 02:30:36,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:30:36,929 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 427 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:36,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 1588 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:30:36,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2022-11-03 02:30:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 2727. [2022-11-03 02:30:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 1.4431401320616288) internal successors, (3934), 2726 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3934 transitions. [2022-11-03 02:30:37,484 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3934 transitions. Word has length 57 [2022-11-03 02:30:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:37,485 INFO L495 AbstractCegarLoop]: Abstraction has 2727 states and 3934 transitions. [2022-11-03 02:30:37,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:37,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3934 transitions. [2022-11-03 02:30:37,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:30:37,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:37,486 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] [2022-11-03 02:30:37,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 02:30:37,486 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:37,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:37,486 INFO L85 PathProgramCache]: Analyzing trace with hash -855501631, now seen corresponding path program 1 times [2022-11-03 02:30:37,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:37,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193858989] [2022-11-03 02:30:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:37,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:38,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:38,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193858989] [2022-11-03 02:30:38,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193858989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:38,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:38,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-03 02:30:38,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534938758] [2022-11-03 02:30:38,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:38,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:30:38,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:38,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:30:38,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:30:38,426 INFO L87 Difference]: Start difference. First operand 2727 states and 3934 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:40,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:40,266 INFO L93 Difference]: Finished difference Result 5952 states and 8617 transitions. [2022-11-03 02:30:40,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:30:40,266 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 57 [2022-11-03 02:30:40,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:40,276 INFO L225 Difference]: With dead ends: 5952 [2022-11-03 02:30:40,276 INFO L226 Difference]: Without dead ends: 5278 [2022-11-03 02:30:40,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:30:40,280 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 472 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:40,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1283 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:30:40,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5278 states. [2022-11-03 02:30:41,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5278 to 2999. [2022-11-03 02:30:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 1.438292194796531) internal successors, (4312), 2998 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 4312 transitions. [2022-11-03 02:30:41,098 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 4312 transitions. Word has length 57 [2022-11-03 02:30:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:41,098 INFO L495 AbstractCegarLoop]: Abstraction has 2999 states and 4312 transitions. [2022-11-03 02:30:41,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 4312 transitions. [2022-11-03 02:30:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 02:30:41,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:41,099 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] [2022-11-03 02:30:41,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 02:30:41,100 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:41,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:41,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1614820665, now seen corresponding path program 1 times [2022-11-03 02:30:41,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:41,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91796588] [2022-11-03 02:30:41,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:41,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:44,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:44,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91796588] [2022-11-03 02:30:44,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91796588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:44,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:44,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-03 02:30:44,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729749824] [2022-11-03 02:30:44,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:44,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:30:44,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:44,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:30:44,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:30:44,421 INFO L87 Difference]: Start difference. First operand 2999 states and 4312 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2022-11-03 02:30:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:50,120 INFO L93 Difference]: Finished difference Result 3374 states and 4820 transitions. [2022-11-03 02:30:50,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:30:50,121 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 [2022-11-03 02:30:50,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:50,128 INFO L225 Difference]: With dead ends: 3374 [2022-11-03 02:30:50,128 INFO L226 Difference]: Without dead ends: 3372 [2022-11-03 02:30:50,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=474, Invalid=1976, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 02:30:50,131 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 759 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 2637 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:50,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 1438 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2637 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:30:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2022-11-03 02:30:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 2999. [2022-11-03 02:30:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 1.438292194796531) internal successors, (4312), 2998 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 4312 transitions. [2022-11-03 02:30:50,904 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 4312 transitions. Word has length 58 [2022-11-03 02:30:50,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:50,904 INFO L495 AbstractCegarLoop]: Abstraction has 2999 states and 4312 transitions. [2022-11-03 02:30:50,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2022-11-03 02:30:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 4312 transitions. [2022-11-03 02:30:50,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 02:30:50,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:50,906 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] [2022-11-03 02:30:50,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 02:30:50,906 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:50,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash 935271769, now seen corresponding path program 1 times [2022-11-03 02:30:50,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:50,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920302738] [2022-11-03 02:30:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:50,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:50,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:50,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920302738] [2022-11-03 02:30:50,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920302738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:50,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:50,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:30:50,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158011103] [2022-11-03 02:30:50,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:50,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:50,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:50,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:50,949 INFO L87 Difference]: Start difference. First operand 2999 states and 4312 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) [2022-11-03 02:30:51,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:51,580 INFO L93 Difference]: Finished difference Result 5079 states and 7341 transitions. [2022-11-03 02:30:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:51,580 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 [2022-11-03 02:30:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:51,584 INFO L225 Difference]: With dead ends: 5079 [2022-11-03 02:30:51,584 INFO L226 Difference]: Without dead ends: 2855 [2022-11-03 02:30:51,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:51,588 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 93 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:51,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 251 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:51,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2022-11-03 02:30:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2853. [2022-11-03 02:30:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 1.437938288920056) internal successors, (4101), 2852 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 4101 transitions. [2022-11-03 02:30:52,218 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 4101 transitions. Word has length 58 [2022-11-03 02:30:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:52,218 INFO L495 AbstractCegarLoop]: Abstraction has 2853 states and 4101 transitions. [2022-11-03 02:30:52,219 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) [2022-11-03 02:30:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 4101 transitions. [2022-11-03 02:30:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 02:30:52,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:52,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:52,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 02:30:52,220 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:52,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:52,221 INFO L85 PathProgramCache]: Analyzing trace with hash 907951061, now seen corresponding path program 1 times [2022-11-03 02:30:52,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:52,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395630798] [2022-11-03 02:30:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:52,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:54,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:54,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395630798] [2022-11-03 02:30:54,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395630798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:54,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:54,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-11-03 02:30:54,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407571905] [2022-11-03 02:30:54,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:54,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:30:54,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:54,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:30:54,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:30:54,450 INFO L87 Difference]: Start difference. First operand 2853 states and 4101 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:58,615 INFO L93 Difference]: Finished difference Result 3168 states and 4539 transitions. [2022-11-03 02:30:58,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:30:58,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-03 02:30:58,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:58,620 INFO L225 Difference]: With dead ends: 3168 [2022-11-03 02:30:58,620 INFO L226 Difference]: Without dead ends: 3166 [2022-11-03 02:30:58,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=410, Invalid=1570, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:30:58,623 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 653 mSDsluCounter, 2301 mSDsCounter, 0 mSdLazyCounter, 1767 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:58,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 2515 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1767 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:30:58,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2022-11-03 02:30:59,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 2849. [2022-11-03 02:30:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 1.4382022471910112) internal successors, (4096), 2848 states have internal predecessors, (4096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 4096 transitions. [2022-11-03 02:30:59,358 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 4096 transitions. Word has length 59 [2022-11-03 02:30:59,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:59,361 INFO L495 AbstractCegarLoop]: Abstraction has 2849 states and 4096 transitions. [2022-11-03 02:30:59,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:59,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 4096 transitions. [2022-11-03 02:30:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 02:30:59,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:59,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:59,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 02:30:59,363 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:59,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:59,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1681225717, now seen corresponding path program 1 times [2022-11-03 02:30:59,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:59,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587865565] [2022-11-03 02:30:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:59,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:02,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:02,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587865565] [2022-11-03 02:31:02,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587865565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:02,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:02,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-03 02:31:02,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341314922] [2022-11-03 02:31:02,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:02,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:31:02,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:02,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:31:02,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:31:02,132 INFO L87 Difference]: Start difference. First operand 2849 states and 4096 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:07,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:07,803 INFO L93 Difference]: Finished difference Result 3854 states and 5529 transitions. [2022-11-03 02:31:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:31:07,804 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-03 02:31:07,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:07,809 INFO L225 Difference]: With dead ends: 3854 [2022-11-03 02:31:07,809 INFO L226 Difference]: Without dead ends: 3852 [2022-11-03 02:31:07,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=446, Invalid=1906, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 02:31:07,812 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 515 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 2855 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 2874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:07,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1676 Invalid, 2874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2855 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:31:07,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3852 states. [2022-11-03 02:31:08,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3852 to 2849. [2022-11-03 02:31:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 1.4382022471910112) internal successors, (4096), 2848 states have internal predecessors, (4096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 4096 transitions. [2022-11-03 02:31:08,597 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 4096 transitions. Word has length 59 [2022-11-03 02:31:08,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:08,598 INFO L495 AbstractCegarLoop]: Abstraction has 2849 states and 4096 transitions. [2022-11-03 02:31:08,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:08,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 4096 transitions. [2022-11-03 02:31:08,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 02:31:08,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:08,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:08,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 02:31:08,599 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:08,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:08,599 INFO L85 PathProgramCache]: Analyzing trace with hash 284311477, now seen corresponding path program 1 times [2022-11-03 02:31:08,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:08,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357577496] [2022-11-03 02:31:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:08,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:10,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:10,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357577496] [2022-11-03 02:31:10,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357577496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:10,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:10,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-11-03 02:31:10,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920522531] [2022-11-03 02:31:10,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:10,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:31:10,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:10,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:31:10,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:31:10,737 INFO L87 Difference]: Start difference. First operand 2849 states and 4096 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:14,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:14,361 INFO L93 Difference]: Finished difference Result 3332 states and 4771 transitions. [2022-11-03 02:31:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:31:14,364 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-03 02:31:14,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:14,368 INFO L225 Difference]: With dead ends: 3332 [2022-11-03 02:31:14,368 INFO L226 Difference]: Without dead ends: 3330 [2022-11-03 02:31:14,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=416, Invalid=1564, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:31:14,370 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 701 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:14,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 1763 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:31:14,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2022-11-03 02:31:15,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2843. [2022-11-03 02:31:15,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2843 states, 2842 states have (on average 1.4387755102040816) internal successors, (4089), 2842 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2843 states to 2843 states and 4089 transitions. [2022-11-03 02:31:15,209 INFO L78 Accepts]: Start accepts. Automaton has 2843 states and 4089 transitions. Word has length 59 [2022-11-03 02:31:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:15,209 INFO L495 AbstractCegarLoop]: Abstraction has 2843 states and 4089 transitions. [2022-11-03 02:31:15,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2843 states and 4089 transitions. [2022-11-03 02:31:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:31:15,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:15,210 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] [2022-11-03 02:31:15,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-03 02:31:15,210 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:15,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1462131223, now seen corresponding path program 1 times [2022-11-03 02:31:15,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:15,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239254206] [2022-11-03 02:31:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:15,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:21,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:21,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239254206] [2022-11-03 02:31:21,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239254206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:21,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:21,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-11-03 02:31:21,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376573370] [2022-11-03 02:31:21,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:21,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 02:31:21,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:21,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 02:31:21,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:31:21,457 INFO L87 Difference]: Start difference. First operand 2843 states and 4089 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:31,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:31,226 INFO L93 Difference]: Finished difference Result 3168 states and 4539 transitions. [2022-11-03 02:31:31,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:31:31,227 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 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 61 [2022-11-03 02:31:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:31,230 INFO L225 Difference]: With dead ends: 3168 [2022-11-03 02:31:31,231 INFO L226 Difference]: Without dead ends: 3166 [2022-11-03 02:31:31,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=684, Invalid=2508, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 02:31:31,232 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 507 mSDsluCounter, 3194 mSDsCounter, 0 mSdLazyCounter, 2717 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 3432 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:31,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 3432 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2717 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-03 02:31:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2022-11-03 02:31:31,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 2831. [2022-11-03 02:31:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2830 states have (on average 1.4406360424028268) internal successors, (4077), 2830 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 4077 transitions. [2022-11-03 02:31:31,867 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 4077 transitions. Word has length 61 [2022-11-03 02:31:31,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:31,867 INFO L495 AbstractCegarLoop]: Abstraction has 2831 states and 4077 transitions. [2022-11-03 02:31:31,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:31,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 4077 transitions. [2022-11-03 02:31:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:31:31,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:31,868 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:31,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-03 02:31:31,869 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:31,869 INFO L85 PathProgramCache]: Analyzing trace with hash 687947099, now seen corresponding path program 1 times [2022-11-03 02:31:31,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:31,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580234079] [2022-11-03 02:31:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:31,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:31,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:31,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580234079] [2022-11-03 02:31:31,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580234079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:31,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:31,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:31:31,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561136293] [2022-11-03 02:31:31,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:31,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:31:31,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:31,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:31:31,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:31:31,961 INFO L87 Difference]: Start difference. First operand 2831 states and 4077 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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) [2022-11-03 02:31:32,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:32,779 INFO L93 Difference]: Finished difference Result 5041 states and 7353 transitions. [2022-11-03 02:31:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:31:32,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 [2022-11-03 02:31:32,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:32,783 INFO L225 Difference]: With dead ends: 5041 [2022-11-03 02:31:32,783 INFO L226 Difference]: Without dead ends: 3959 [2022-11-03 02:31:32,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:31:32,786 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 71 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:32,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 312 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:31:32,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2022-11-03 02:31:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 3734. [2022-11-03 02:31:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3734 states, 3733 states have (on average 1.4401285829091883) internal successors, (5376), 3733 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:33,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 5376 transitions. [2022-11-03 02:31:33,620 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 5376 transitions. Word has length 63 [2022-11-03 02:31:33,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:33,620 INFO L495 AbstractCegarLoop]: Abstraction has 3734 states and 5376 transitions. [2022-11-03 02:31:33,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:33,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 5376 transitions. [2022-11-03 02:31:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:31:33,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:33,622 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:33,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-03 02:31:33,622 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:33,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:33,622 INFO L85 PathProgramCache]: Analyzing trace with hash 571946117, now seen corresponding path program 1 times [2022-11-03 02:31:33,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:33,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352020603] [2022-11-03 02:31:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:33,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:33,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:33,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352020603] [2022-11-03 02:31:33,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352020603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:33,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:33,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:31:33,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214018615] [2022-11-03 02:31:33,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:33,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:31:33,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:33,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:31:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:31:33,724 INFO L87 Difference]: Start difference. First operand 3734 states and 5376 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:34,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:34,774 INFO L93 Difference]: Finished difference Result 6861 states and 9978 transitions. [2022-11-03 02:31:34,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:31:34,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2022-11-03 02:31:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:34,779 INFO L225 Difference]: With dead ends: 6861 [2022-11-03 02:31:34,779 INFO L226 Difference]: Without dead ends: 4891 [2022-11-03 02:31:34,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:31:34,782 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 67 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:34,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 294 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:31:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2022-11-03 02:31:35,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 4529. [2022-11-03 02:31:35,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4528 states have (on average 1.437720848056537) internal successors, (6510), 4528 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 6510 transitions. [2022-11-03 02:31:35,679 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 6510 transitions. Word has length 65 [2022-11-03 02:31:35,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:35,679 INFO L495 AbstractCegarLoop]: Abstraction has 4529 states and 6510 transitions. [2022-11-03 02:31:35,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 6510 transitions. [2022-11-03 02:31:35,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:31:35,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:35,680 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:35,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-03 02:31:35,681 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:35,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:35,681 INFO L85 PathProgramCache]: Analyzing trace with hash -115856907, now seen corresponding path program 1 times [2022-11-03 02:31:35,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:35,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028967134] [2022-11-03 02:31:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:35,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:35,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:35,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028967134] [2022-11-03 02:31:35,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028967134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:35,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:35,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:31:35,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157849975] [2022-11-03 02:31:35,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:35,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:31:35,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:35,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:31:35,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:31:35,721 INFO L87 Difference]: Start difference. First operand 4529 states and 6510 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:37,118 INFO L93 Difference]: Finished difference Result 8735 states and 12543 transitions. [2022-11-03 02:31:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:31:37,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:31:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:37,125 INFO L225 Difference]: With dead ends: 8735 [2022-11-03 02:31:37,125 INFO L226 Difference]: Without dead ends: 6241 [2022-11-03 02:31:37,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:31:37,129 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 67 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:37,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 300 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:31:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6241 states. [2022-11-03 02:31:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6241 to 6239. [2022-11-03 02:31:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6239 states, 6238 states have (on average 1.4233728759217699) internal successors, (8879), 6238 states have internal predecessors, (8879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:38,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6239 states to 6239 states and 8879 transitions. [2022-11-03 02:31:38,834 INFO L78 Accepts]: Start accepts. Automaton has 6239 states and 8879 transitions. Word has length 68 [2022-11-03 02:31:38,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:38,834 INFO L495 AbstractCegarLoop]: Abstraction has 6239 states and 8879 transitions. [2022-11-03 02:31:38,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:38,834 INFO L276 IsEmpty]: Start isEmpty. Operand 6239 states and 8879 transitions. [2022-11-03 02:31:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:31:38,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:38,836 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:38,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-03 02:31:38,836 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:38,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1887839819, now seen corresponding path program 1 times [2022-11-03 02:31:38,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:38,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865368814] [2022-11-03 02:31:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:38,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:38,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:38,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865368814] [2022-11-03 02:31:38,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865368814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:38,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:38,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:31:38,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380410805] [2022-11-03 02:31:38,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:38,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:31:38,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:31:38,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:31:38,909 INFO L87 Difference]: Start difference. First operand 6239 states and 8879 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:40,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:40,846 INFO L93 Difference]: Finished difference Result 12774 states and 18330 transitions. [2022-11-03 02:31:40,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:31:40,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:31:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:40,855 INFO L225 Difference]: With dead ends: 12774 [2022-11-03 02:31:40,855 INFO L226 Difference]: Without dead ends: 8644 [2022-11-03 02:31:40,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:31:40,858 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 62 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:40,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 275 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:31:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8644 states. [2022-11-03 02:31:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8644 to 7889. [2022-11-03 02:31:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7889 states, 7888 states have (on average 1.4156947261663286) internal successors, (11167), 7888 states have internal predecessors, (11167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7889 states to 7889 states and 11167 transitions. [2022-11-03 02:31:42,614 INFO L78 Accepts]: Start accepts. Automaton has 7889 states and 11167 transitions. Word has length 68 [2022-11-03 02:31:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:42,614 INFO L495 AbstractCegarLoop]: Abstraction has 7889 states and 11167 transitions. [2022-11-03 02:31:42,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:42,615 INFO L276 IsEmpty]: Start isEmpty. Operand 7889 states and 11167 transitions. [2022-11-03 02:31:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:31:42,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:42,617 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:42,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-03 02:31:42,617 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:42,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1583220552, now seen corresponding path program 1 times [2022-11-03 02:31:42,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:42,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291258950] [2022-11-03 02:31:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:42,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:42,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:42,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291258950] [2022-11-03 02:31:42,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291258950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:42,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:42,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:31:42,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575028707] [2022-11-03 02:31:42,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:42,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:31:42,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:42,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:31:42,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:31:42,713 INFO L87 Difference]: Start difference. First operand 7889 states and 11167 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:45,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:45,517 INFO L93 Difference]: Finished difference Result 18667 states and 26564 transitions. [2022-11-03 02:31:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:31:45,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 [2022-11-03 02:31:45,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:45,530 INFO L225 Difference]: With dead ends: 18667 [2022-11-03 02:31:45,530 INFO L226 Difference]: Without dead ends: 11615 [2022-11-03 02:31:45,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:31:45,536 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 57 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 254 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 [2022-11-03 02:31:45,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 254 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:31:45,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11615 states. [2022-11-03 02:31:48,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11615 to 10579. [2022-11-03 02:31:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10579 states, 10578 states have (on average 1.4065986008697295) internal successors, (14879), 10578 states have internal predecessors, (14879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10579 states to 10579 states and 14879 transitions. [2022-11-03 02:31:48,149 INFO L78 Accepts]: Start accepts. Automaton has 10579 states and 14879 transitions. Word has length 71 [2022-11-03 02:31:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:48,150 INFO L495 AbstractCegarLoop]: Abstraction has 10579 states and 14879 transitions. [2022-11-03 02:31:48,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:48,150 INFO L276 IsEmpty]: Start isEmpty. Operand 10579 states and 14879 transitions. [2022-11-03 02:31:48,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 02:31:48,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:48,154 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:48,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-03 02:31:48,155 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:48,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:48,155 INFO L85 PathProgramCache]: Analyzing trace with hash -973034147, now seen corresponding path program 1 times [2022-11-03 02:31:48,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:48,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867042748] [2022-11-03 02:31:48,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:48,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:31:48,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:48,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867042748] [2022-11-03 02:31:48,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867042748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:48,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:48,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:31:48,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550922099] [2022-11-03 02:31:48,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:48,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:31:48,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:48,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:31:48,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:31:48,406 INFO L87 Difference]: Start difference. First operand 10579 states and 14879 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:56,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:56,896 INFO L93 Difference]: Finished difference Result 41152 states and 57500 transitions. [2022-11-03 02:31:56,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:31:56,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 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 85 [2022-11-03 02:31:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:56,937 INFO L225 Difference]: With dead ends: 41152 [2022-11-03 02:31:56,937 INFO L226 Difference]: Without dead ends: 31387 [2022-11-03 02:31:56,947 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 [2022-11-03 02:31:56,947 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1142 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:56,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 263 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:31:56,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31387 states. [2022-11-03 02:32:02,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31387 to 19839. [2022-11-03 02:32:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19839 states, 19838 states have (on average 1.3840608932352052) internal successors, (27457), 19838 states have internal predecessors, (27457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:02,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19839 states to 19839 states and 27457 transitions. [2022-11-03 02:32:02,958 INFO L78 Accepts]: Start accepts. Automaton has 19839 states and 27457 transitions. Word has length 85 [2022-11-03 02:32:02,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:02,958 INFO L495 AbstractCegarLoop]: Abstraction has 19839 states and 27457 transitions. [2022-11-03 02:32:02,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:02,959 INFO L276 IsEmpty]: Start isEmpty. Operand 19839 states and 27457 transitions. [2022-11-03 02:32:02,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 02:32:02,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:02,966 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:02,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-03 02:32:02,966 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:02,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1938486078, now seen corresponding path program 1 times [2022-11-03 02:32:02,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:02,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303192126] [2022-11-03 02:32:02,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:02,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:32:04,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:04,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303192126] [2022-11-03 02:32:04,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303192126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:32:04,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141373150] [2022-11-03 02:32:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:04,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:04,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:04,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:04,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:32:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:05,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:32:05,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:32:07,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:32:07,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141373150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:32:07,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:32:07,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [21] total 35 [2022-11-03 02:32:07,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510927934] [2022-11-03 02:32:07,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:32:07,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:32:07,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:32:07,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:32:07,223 INFO L87 Difference]: Start difference. First operand 19839 states and 27457 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:23,848 INFO L93 Difference]: Finished difference Result 41029 states and 56410 transitions. [2022-11-03 02:32:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-03 02:32:23,849 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 states have internal predecessors, (83), 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 85 [2022-11-03 02:32:23,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:23,900 INFO L225 Difference]: With dead ends: 41029 [2022-11-03 02:32:23,901 INFO L226 Difference]: Without dead ends: 34069 [2022-11-03 02:32:23,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=662, Invalid=3370, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 02:32:23,911 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 2358 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2358 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:23,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2358 Valid, 1373 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:32:23,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34069 states. [2022-11-03 02:32:31,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34069 to 24273. [2022-11-03 02:32:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24273 states, 24272 states have (on average 1.3690260382333552) internal successors, (33229), 24272 states have internal predecessors, (33229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24273 states to 24273 states and 33229 transitions. [2022-11-03 02:32:31,979 INFO L78 Accepts]: Start accepts. Automaton has 24273 states and 33229 transitions. Word has length 85 [2022-11-03 02:32:31,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:31,980 INFO L495 AbstractCegarLoop]: Abstraction has 24273 states and 33229 transitions. [2022-11-03 02:32:31,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 24273 states and 33229 transitions. [2022-11-03 02:32:31,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 02:32:31,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:31,986 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:32,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:32,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:32,201 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:32,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1561531491, now seen corresponding path program 1 times [2022-11-03 02:32:32,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:32,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366477027] [2022-11-03 02:32:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:32,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:32:32,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:32,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366477027] [2022-11-03 02:32:32,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366477027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:32:32,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:32:32,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:32:32,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326982604] [2022-11-03 02:32:32,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:32:32,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:32:32,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:32,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:32:32,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:32:32,416 INFO L87 Difference]: Start difference. First operand 24273 states and 33229 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:49,987 INFO L93 Difference]: Finished difference Result 72752 states and 99882 transitions. [2022-11-03 02:32:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:32:49,987 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 85 [2022-11-03 02:32:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:50,075 INFO L225 Difference]: With dead ends: 72752 [2022-11-03 02:32:50,075 INFO L226 Difference]: Without dead ends: 49186 [2022-11-03 02:32:50,102 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 [2022-11-03 02:32:50,103 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 721 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:50,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 298 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:32:50,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49186 states. [2022-11-03 02:33:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49186 to 39961. [2022-11-03 02:33:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39961 states, 39960 states have (on average 1.3537537537537538) internal successors, (54096), 39960 states have internal predecessors, (54096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39961 states to 39961 states and 54096 transitions. [2022-11-03 02:33:04,311 INFO L78 Accepts]: Start accepts. Automaton has 39961 states and 54096 transitions. Word has length 85 [2022-11-03 02:33:04,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:04,311 INFO L495 AbstractCegarLoop]: Abstraction has 39961 states and 54096 transitions. [2022-11-03 02:33:04,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 39961 states and 54096 transitions. [2022-11-03 02:33:04,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 02:33:04,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:04,316 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:04,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-03 02:33:04,316 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:04,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:04,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1604932930, now seen corresponding path program 1 times [2022-11-03 02:33:04,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:04,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313134968] [2022-11-03 02:33:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:04,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:06,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:06,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313134968] [2022-11-03 02:33:06,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313134968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:33:06,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550904766] [2022-11-03 02:33:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:06,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:06,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:06,333 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:06,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:33:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:06,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-03 02:33:06,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:09,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:50,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550904766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:50,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2103116731] [2022-11-03 02:33:50,217 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-11-03 02:33:50,217 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:33:50,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:33:50,229 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:33:50,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:33:51,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:51,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:51,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:51,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:51,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:51,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:51,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-03 02:33:51,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:33:51,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:33:51,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:33:51,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 21 [2022-11-03 02:37:59,874 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:39:06,140 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '741055#(and (<= (+ |ULTIMATE.start_main_~node2__m2~1#1| 1) 0) (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= 0 ~p4~0) (<= ~send3~0 127) (<= ~p3~0 0) (<= 1 ~__return_10664~0) (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (= ~nomsg~0 ~p4_new~0) (<= 0 |#NULL.base|) (<= ~st3~0 0) (<= ~__return_10664~0 1) (= |ULTIMATE.start_main_~assert__arg~1#1| |ULTIMATE.start_main_~__tmp_2~0#1|) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 ~mode4~0) (<= 0 ~send4~0) (<= 0 (+ ~p1_old~0 1)) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 1 ~__return_10566~0) (<= 0 ~id1~0) (<= 0 ~st4~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (= |ULTIMATE.start_main_~main__c1~0#1| ~__return_10824~0) (<= 1 ~r1~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~1#1| 1)) (= ~p3_new~0 ~nomsg~0) (<= ~send4~0 127) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_2~0#1|) (<= 0 (+ ~p3_old~0 1)) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (= |ULTIMATE.start_main_~check__tmp~1#1| ~__return_10824~0) (<= 0 ~st1~0) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~1#1| 1)) (<= ~r1~0 257) (<= 0 ~st2~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (<= 0 ~p3~0) (<= ~__return_10566~0 1) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (= ~nomsg~0 ~p2_new~0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= (+ |ULTIMATE.start_main_~node4__m4~1#1| 1) 0) (<= ~send2~0 127) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= |ULTIMATE.start_main_~main__i2~0#1| 0) (<= (+ ~nomsg~0 1) 0) (<= ~p4~0 0) (<= ~mode1~0 1) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~1#1| 1)) (<= ~st2~0 0) (<= |#NULL.base| 0) (<= ~st4~0 0) (<= 0 ~id4~0) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 |ULTIMATE.start_main_~node4____CPAchecker_TMP_0~0#1|) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= |ULTIMATE.start_main_~node4____CPAchecker_TMP_0~0#1| 127) (<= (+ |ULTIMATE.start_main_~node3__m3~1#1| 1) 0) (<= 1 |ULTIMATE.start_main_~check__tmp~0#1|) (<= ~p2~0 0) (<= ~id2~0 127) (<= 0 ~st3~0) (= (mod |ULTIMATE.start_main_~assert__arg~1#1| 256) 0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (<= (+ ~p2_old~0 1) 0) (or (and (not (= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1)) (not (< (mod ~r1~0 256) 4))) (not (<= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1))) (<= (+ ~p1_old~0 1) 0) (<= 0 ~send3~0) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|))' at error location [2022-11-03 02:39:06,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:39:06,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:39:06,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 17] total 59 [2022-11-03 02:39:06,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455676063] [2022-11-03 02:39:06,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:06,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-03 02:39:06,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:06,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-03 02:39:06,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1731, Invalid=12075, Unknown=0, NotChecked=0, Total=13806 [2022-11-03 02:39:06,145 INFO L87 Difference]: Start difference. First operand 39961 states and 54096 transitions. Second operand has 59 states, 59 states have (on average 4.271186440677966) internal successors, (252), 59 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:51,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:51,228 INFO L93 Difference]: Finished difference Result 147450 states and 199445 transitions. [2022-11-03 02:41:51,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-11-03 02:41:51,229 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 4.271186440677966) internal successors, (252), 59 states have internal predecessors, (252), 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 85 [2022-11-03 02:41:51,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:51,419 INFO L225 Difference]: With dead ends: 147450 [2022-11-03 02:41:51,419 INFO L226 Difference]: Without dead ends: 108252 [2022-11-03 02:41:51,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 153 SyntacticMatches, 8 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33125 ImplicationChecksByTransitivity, 171.3s TimeCoverageRelationStatistics Valid=8463, Invalid=70217, Unknown=0, NotChecked=0, Total=78680 [2022-11-03 02:41:51,471 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 9498 mSDsluCounter, 3051 mSDsCounter, 0 mSdLazyCounter, 5183 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9498 SdHoareTripleChecker+Valid, 3180 SdHoareTripleChecker+Invalid, 6062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 5183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:51,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9498 Valid, 3180 Invalid, 6062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 5183 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2022-11-03 02:41:51,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108252 states. [2022-11-03 02:42:34,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108252 to 79409. [2022-11-03 02:42:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79409 states, 79408 states have (on average 1.333001712673786) internal successors, (105851), 79408 states have internal predecessors, (105851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79409 states to 79409 states and 105851 transitions. [2022-11-03 02:42:34,418 INFO L78 Accepts]: Start accepts. Automaton has 79409 states and 105851 transitions. Word has length 85 [2022-11-03 02:42:34,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:34,419 INFO L495 AbstractCegarLoop]: Abstraction has 79409 states and 105851 transitions. [2022-11-03 02:42:34,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 4.271186440677966) internal successors, (252), 59 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 79409 states and 105851 transitions. [2022-11-03 02:42:34,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 02:42:34,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:34,425 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:34,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:42:34,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82530ecc-c771-4842-b2ce-55cbd3e00f66/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-03 02:42:34,641 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:34,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:34,641 INFO L85 PathProgramCache]: Analyzing trace with hash -108407317, now seen corresponding path program 1 times [2022-11-03 02:42:34,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:34,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779651381] [2022-11-03 02:42:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:34,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:42:34,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:34,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779651381] [2022-11-03 02:42:34,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779651381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:34,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:34,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:42:34,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920795293] [2022-11-03 02:42:34,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:34,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:42:34,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:34,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:42:34,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:34,800 INFO L87 Difference]: Start difference. First operand 79409 states and 105851 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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)