./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS --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 a10c9e6583b7bb9620d063f223dce3a6f04929588e6f4ac23db6236ec494c7b2 --- 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-8393723 [2022-11-19 07:34:23,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:34:23,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:34:24,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:34:24,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:34:24,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:34:24,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:34:24,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:34:24,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:34:24,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:34:24,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:34:24,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:34:24,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:34:24,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:34:24,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:34:24,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:34:24,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:34:24,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:34:24,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:34:24,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:34:24,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:34:24,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:34:24,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:34:24,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:34:24,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:34:24,072 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:34:24,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:34:24,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:34:24,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:34:24,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:34:24,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:34:24,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:34:24,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:34:24,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:34:24,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:34:24,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:34:24,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:34:24,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:34:24,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:34:24,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:34:24,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:34:24,088 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:34:24,127 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:34:24,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:34:24,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:34:24,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:34:24,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:34:24,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:34:24,130 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:34:24,130 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:34:24,131 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:34:24,131 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:34:24,132 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:34:24,132 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:34:24,133 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:34:24,133 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:34:24,133 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:34:24,133 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:34:24,133 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:34:24,134 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:34:24,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:34:24,135 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:34:24,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:34:24,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:34:24,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:34:24,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:34:24,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:34:24,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:34:24,138 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:34:24,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:34:24,138 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:34:24,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:34:24,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:34:24,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:34:24,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:34:24,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:34:24,140 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:34:24,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:34:24,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:34:24,140 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:34:24,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:34:24,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:34:24,141 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:34:24,141 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_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a10c9e6583b7bb9620d063f223dce3a6f04929588e6f4ac23db6236ec494c7b2 [2022-11-19 07:34:24,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:34:24,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:34:24,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:34:24,432 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:34:24,433 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:34:24,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c [2022-11-19 07:34:24,519 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/data/706c7e3cf/ed155196b1714acab3c42bd0996f178b/FLAG43cfe0207 [2022-11-19 07:34:25,040 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:34:25,041 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c [2022-11-19 07:34:25,054 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/data/706c7e3cf/ed155196b1714acab3c42bd0996f178b/FLAG43cfe0207 [2022-11-19 07:34:25,356 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/data/706c7e3cf/ed155196b1714acab3c42bd0996f178b [2022-11-19 07:34:25,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:34:25,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:34:25,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:34:25,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:34:25,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:34:25,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:25" (1/1) ... [2022-11-19 07:34:25,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1456f43a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:25, skipping insertion in model container [2022-11-19 07:34:25,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:25" (1/1) ... [2022-11-19 07:34:25,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:34:25,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:34:25,814 WARN L234 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_989bdba0-2b4b-440a-8652-0fb3544573c2/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c[14521,14534] [2022-11-19 07:34:25,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:34:25,829 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:34:25,911 WARN L234 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_989bdba0-2b4b-440a-8652-0fb3544573c2/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c[14521,14534] [2022-11-19 07:34:25,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:34:25,927 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:34:25,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:25 WrapperNode [2022-11-19 07:34:25,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:34:25,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:34:25,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:34:25,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:34:25,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:25" (1/1) ... [2022-11-19 07:34:25,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:25" (1/1) ... [2022-11-19 07:34:26,017 INFO L138 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 457 [2022-11-19 07:34:26,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:34:26,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:34:26,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:34:26,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:34:26,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:25" (1/1) ... [2022-11-19 07:34:26,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:25" (1/1) ... [2022-11-19 07:34:26,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:25" (1/1) ... [2022-11-19 07:34:26,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:25" (1/1) ... [2022-11-19 07:34:26,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:25" (1/1) ... [2022-11-19 07:34:26,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:25" (1/1) ... [2022-11-19 07:34:26,101 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:25" (1/1) ... [2022-11-19 07:34:26,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:25" (1/1) ... [2022-11-19 07:34:26,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:34:26,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:34:26,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:34:26,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:34:26,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:25" (1/1) ... [2022-11-19 07:34:26,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:34:26,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:26,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:34:26,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:34:26,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:34:26,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:34:26,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:34:26,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:34:26,363 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:34:26,366 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:34:27,082 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:34:27,925 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:34:27,925 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:34:27,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:27 BoogieIcfgContainer [2022-11-19 07:34:27,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:34:27,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:34:27,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:34:27,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:34:27,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:34:25" (1/3) ... [2022-11-19 07:34:27,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277f234f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:27, skipping insertion in model container [2022-11-19 07:34:27,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:25" (2/3) ... [2022-11-19 07:34:27,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277f234f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:27, skipping insertion in model container [2022-11-19 07:34:27,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:27" (3/3) ... [2022-11-19 07:34:27,938 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c [2022-11-19 07:34:27,961 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:34:27,962 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:34:28,029 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:34:28,037 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;@288abace, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:34:28,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:34:28,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:28,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:34:28,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:28,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:34:28,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:28,059 INFO L85 PathProgramCache]: Analyzing trace with hash 527509791, now seen corresponding path program 1 times [2022-11-19 07:34:28,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:28,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930685421] [2022-11-19 07:34:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:28,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:31,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:31,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930685421] [2022-11-19 07:34:31,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930685421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:31,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:31,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:31,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173940437] [2022-11-19 07:34:31,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:31,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:31,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:31,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:31,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:31,131 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:31,276 INFO L93 Difference]: Finished difference Result 54 states and 90 transitions. [2022-11-19 07:34:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:34:31,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-19 07:34:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:31,288 INFO L225 Difference]: With dead ends: 54 [2022-11-19 07:34:31,288 INFO L226 Difference]: Without dead ends: 36 [2022-11-19 07:34:31,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:31,295 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:31,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 38 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-19 07:34:31,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2022-11-19 07:34:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 41 transitions. [2022-11-19 07:34:31,330 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 41 transitions. Word has length 6 [2022-11-19 07:34:31,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:31,331 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 41 transitions. [2022-11-19 07:34:31,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:31,331 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 41 transitions. [2022-11-19 07:34:31,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:34:31,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:31,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:31,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:34:31,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:31,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:31,333 INFO L85 PathProgramCache]: Analyzing trace with hash -889700182, now seen corresponding path program 1 times [2022-11-19 07:34:31,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:31,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448604184] [2022-11-19 07:34:31,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:31,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:32,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:32,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448604184] [2022-11-19 07:34:32,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448604184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:32,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:32,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:32,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498008364] [2022-11-19 07:34:32,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:32,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:32,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:32,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:32,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:32,976 INFO L87 Difference]: Start difference. First operand 26 states and 41 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:33,079 INFO L93 Difference]: Finished difference Result 57 states and 87 transitions. [2022-11-19 07:34:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:34:33,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-11-19 07:34:33,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:33,081 INFO L225 Difference]: With dead ends: 57 [2022-11-19 07:34:33,081 INFO L226 Difference]: Without dead ends: 38 [2022-11-19 07:34:33,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:33,083 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:33,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 45 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-19 07:34:33,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2022-11-19 07:34:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 40 transitions. [2022-11-19 07:34:33,099 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 40 transitions. Word has length 7 [2022-11-19 07:34:33,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:33,100 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 40 transitions. [2022-11-19 07:34:33,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:33,102 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 40 transitions. [2022-11-19 07:34:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:34:33,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:33,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:33,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:34:33,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:33,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1868084632, now seen corresponding path program 1 times [2022-11-19 07:34:33,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:33,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147392409] [2022-11-19 07:34:33,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:33,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:34,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:34,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147392409] [2022-11-19 07:34:34,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147392409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:34,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:34,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:34:34,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118792374] [2022-11-19 07:34:34,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:34,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:34:34,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:34,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:34:34,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:34:34,745 INFO L87 Difference]: Start difference. First operand 26 states and 40 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:34,902 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2022-11-19 07:34:34,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:34:34,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-19 07:34:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:34,904 INFO L225 Difference]: With dead ends: 63 [2022-11-19 07:34:34,904 INFO L226 Difference]: Without dead ends: 44 [2022-11-19 07:34:34,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:34:34,905 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:34,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 43 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:34,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-19 07:34:34,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2022-11-19 07:34:34,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 39 transitions. [2022-11-19 07:34:34,912 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 39 transitions. Word has length 8 [2022-11-19 07:34:34,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:34,913 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 39 transitions. [2022-11-19 07:34:34,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:34,913 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 39 transitions. [2022-11-19 07:34:34,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:34:34,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:34,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:34,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:34:34,915 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:34,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:34,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2127779757, now seen corresponding path program 1 times [2022-11-19 07:34:34,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:34,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942545709] [2022-11-19 07:34:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:34,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:36,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:36,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942545709] [2022-11-19 07:34:36,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942545709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:36,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:36,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:34:36,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049444125] [2022-11-19 07:34:36,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:36,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:34:36,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:36,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:34:36,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:34:36,550 INFO L87 Difference]: Start difference. First operand 26 states and 39 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:36,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:36,749 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2022-11-19 07:34:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:34:36,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-19 07:34:36,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:36,752 INFO L225 Difference]: With dead ends: 63 [2022-11-19 07:34:36,753 INFO L226 Difference]: Without dead ends: 44 [2022-11-19 07:34:36,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:34:36,759 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:36,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 46 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-19 07:34:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2022-11-19 07:34:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2022-11-19 07:34:36,773 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 9 [2022-11-19 07:34:36,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:36,773 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2022-11-19 07:34:36,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:36,774 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2022-11-19 07:34:36,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:34:36,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:36,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:36,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:34:36,775 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:36,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:36,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1865461733, now seen corresponding path program 1 times [2022-11-19 07:34:36,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:36,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778975977] [2022-11-19 07:34:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:36,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:38,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:38,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778975977] [2022-11-19 07:34:38,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778975977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:38,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:38,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:38,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606742172] [2022-11-19 07:34:38,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:38,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:38,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:38,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:38,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:38,334 INFO L87 Difference]: Start difference. First operand 26 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:38,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:38,441 INFO L93 Difference]: Finished difference Result 55 states and 81 transitions. [2022-11-19 07:34:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:34:38,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-19 07:34:38,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:38,443 INFO L225 Difference]: With dead ends: 55 [2022-11-19 07:34:38,443 INFO L226 Difference]: Without dead ends: 36 [2022-11-19 07:34:38,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:38,444 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:38,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 42 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-19 07:34:38,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-11-19 07:34:38,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2022-11-19 07:34:38,452 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 11 [2022-11-19 07:34:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:38,452 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2022-11-19 07:34:38,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2022-11-19 07:34:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:34:38,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:38,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:38,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:34:38,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:38,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:38,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2082665953, now seen corresponding path program 1 times [2022-11-19 07:34:38,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:38,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389862048] [2022-11-19 07:34:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:38,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:39,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:39,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389862048] [2022-11-19 07:34:39,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389862048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:39,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:39,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:39,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61488557] [2022-11-19 07:34:39,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:39,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:39,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:39,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:39,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:39,689 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:39,772 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2022-11-19 07:34:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:34:39,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-11-19 07:34:39,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:39,774 INFO L225 Difference]: With dead ends: 56 [2022-11-19 07:34:39,774 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 07:34:39,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:39,775 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:39,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:39,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 07:34:39,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2022-11-19 07:34:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2022-11-19 07:34:39,783 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 12 [2022-11-19 07:34:39,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:39,784 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2022-11-19 07:34:39,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2022-11-19 07:34:39,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:34:39,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:39,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:39,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:34:39,786 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:39,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:39,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1526566181, now seen corresponding path program 1 times [2022-11-19 07:34:39,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:39,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829431391] [2022-11-19 07:34:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:39,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:41,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:41,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829431391] [2022-11-19 07:34:41,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829431391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:41,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:41,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:41,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389411391] [2022-11-19 07:34:41,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:41,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:41,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:41,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:41,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:41,202 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:41,294 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2022-11-19 07:34:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:34:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-19 07:34:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:41,297 INFO L225 Difference]: With dead ends: 56 [2022-11-19 07:34:41,298 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 07:34:41,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:41,303 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:41,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 45 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 07:34:41,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-11-19 07:34:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-11-19 07:34:41,317 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 14 [2022-11-19 07:34:41,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:41,318 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-11-19 07:34:41,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:41,318 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-11-19 07:34:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:34:41,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:41,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:41,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:34:41,320 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:41,321 INFO L85 PathProgramCache]: Analyzing trace with hash 67785475, now seen corresponding path program 1 times [2022-11-19 07:34:41,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:41,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996341847] [2022-11-19 07:34:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:41,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:41,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:41,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996341847] [2022-11-19 07:34:41,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996341847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:41,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:41,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:34:41,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097793439] [2022-11-19 07:34:41,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:41,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:34:41,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:41,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:34:41,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:34:41,614 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:41,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:41,804 INFO L93 Difference]: Finished difference Result 77 states and 113 transitions. [2022-11-19 07:34:41,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:34:41,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-19 07:34:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:41,805 INFO L225 Difference]: With dead ends: 77 [2022-11-19 07:34:41,806 INFO L226 Difference]: Without dead ends: 58 [2022-11-19 07:34:41,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:34:41,807 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 43 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:41,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 98 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-19 07:34:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-11-19 07:34:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-19 07:34:41,818 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 15 [2022-11-19 07:34:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:41,818 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-19 07:34:41,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:34:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-19 07:34:41,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:34:41,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:41,819 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:41,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:34:41,820 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:41,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:41,820 INFO L85 PathProgramCache]: Analyzing trace with hash -672802472, now seen corresponding path program 1 times [2022-11-19 07:34:41,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:41,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228242073] [2022-11-19 07:34:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:41,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:45,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:45,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228242073] [2022-11-19 07:34:45,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228242073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:45,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366716486] [2022-11-19 07:34:45,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:45,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:45,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:45,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:45,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_989bdba0-2b4b-440a-8652-0fb3544573c2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:34:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:45,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:34:45,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:07,352 INFO L328 TraceCheckSpWp]: Computing backward predicates...