./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.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_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/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_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/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_0315495a-a85c-4df1-8a15-1822e92edbdb/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 3f728e04159b75fd4f86d9e171d07387390897d2fdfdd24db8ac526a2f9d83e1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:50:24,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:50:24,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:50:24,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:50:24,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:50:24,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:50:24,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:50:24,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:50:24,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:50:24,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:50:24,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:50:24,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:50:24,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:50:24,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:50:24,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:50:24,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:50:24,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:50:24,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:50:24,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:50:24,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:50:24,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:50:24,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:50:24,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:50:24,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:50:24,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:50:24,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:50:24,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:50:24,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:50:24,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:50:24,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:50:24,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:50:24,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:50:24,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:50:24,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:50:24,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:50:24,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:50:24,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:50:24,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:50:24,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:50:24,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:50:24,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:50:24,126 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:50:24,171 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:50:24,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:50:24,172 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:50:24,172 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:50:24,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:50:24,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:50:24,173 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:50:24,173 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:50:24,174 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:50:24,174 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:50:24,174 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:50:24,174 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:50:24,174 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:50:24,174 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:50:24,175 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:50:24,175 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:50:24,175 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:50:24,175 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:50:24,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:50:24,176 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:50:24,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:50:24,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:50:24,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:50:24,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:50:24,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:50:24,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:50:24,179 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:50:24,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:50:24,179 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:50:24,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:50:24,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:50:24,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:50:24,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:50:24,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:50:24,181 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:50:24,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:50:24,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:50:24,181 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:50:24,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:50:24,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:50:24,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:50:24,182 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_0315495a-a85c-4df1-8a15-1822e92edbdb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f728e04159b75fd4f86d9e171d07387390897d2fdfdd24db8ac526a2f9d83e1 [2022-11-03 01:50:24,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:50:24,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:50:24,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:50:24,534 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:50:24,535 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:50:24,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c [2022-11-03 01:50:24,610 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI/data/79edfb480/f162eb890b54436098a22b509b17967a/FLAG37991e290 [2022-11-03 01:50:25,155 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:50:25,155 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c [2022-11-03 01:50:25,167 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI/data/79edfb480/f162eb890b54436098a22b509b17967a/FLAG37991e290 [2022-11-03 01:50:25,457 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI/data/79edfb480/f162eb890b54436098a22b509b17967a [2022-11-03 01:50:25,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:50:25,461 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:50:25,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:50:25,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:50:25,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:50:25,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:50:25" (1/1) ... [2022-11-03 01:50:25,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d6daab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:25, skipping insertion in model container [2022-11-03 01:50:25,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:50:25" (1/1) ... [2022-11-03 01:50:25,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:50:25,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:50:25,855 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_0315495a-a85c-4df1-8a15-1822e92edbdb/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c[12762,12775] [2022-11-03 01:50:25,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:50:25,877 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:50:25,962 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_0315495a-a85c-4df1-8a15-1822e92edbdb/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c[12762,12775] [2022-11-03 01:50:25,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:50:25,977 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:50:25,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:25 WrapperNode [2022-11-03 01:50:25,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:50:25,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:50:25,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:50:25,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:50:25,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:25" (1/1) ... [2022-11-03 01:50:25,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:25" (1/1) ... [2022-11-03 01:50:26,027 INFO L138 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 441 [2022-11-03 01:50:26,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:50:26,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:50:26,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:50:26,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:50:26,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:25" (1/1) ... [2022-11-03 01:50:26,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:25" (1/1) ... [2022-11-03 01:50:26,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:25" (1/1) ... [2022-11-03 01:50:26,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:25" (1/1) ... [2022-11-03 01:50:26,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:25" (1/1) ... [2022-11-03 01:50:26,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:25" (1/1) ... [2022-11-03 01:50:26,080 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:25" (1/1) ... [2022-11-03 01:50:26,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:25" (1/1) ... [2022-11-03 01:50:26,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:50:26,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:50:26,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:50:26,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:50:26,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:25" (1/1) ... [2022-11-03 01:50:26,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:50:26,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:26,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:50:26,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:50:26,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:50:26,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:50:26,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:50:26,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:50:26,358 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:50:26,360 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:50:26,958 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:50:27,674 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:50:27,674 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:50:27,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:50:27 BoogieIcfgContainer [2022-11-03 01:50:27,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:50:27,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:50:27,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:50:27,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:50:27,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:50:25" (1/3) ... [2022-11-03 01:50:27,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ad26b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:50:27, skipping insertion in model container [2022-11-03 01:50:27,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:50:25" (2/3) ... [2022-11-03 01:50:27,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ad26b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:50:27, skipping insertion in model container [2022-11-03 01:50:27,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:50:27" (3/3) ... [2022-11-03 01:50:27,688 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c [2022-11-03 01:50:27,707 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:50:27,707 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:50:27,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:50:27,795 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;@f7f3ed6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:50:27,796 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:50:27,800 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) [2022-11-03 01:50:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 01:50:27,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:27,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 01:50:27,808 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:27,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:27,819 INFO L85 PathProgramCache]: Analyzing trace with hash -875501389, now seen corresponding path program 1 times [2022-11-03 01:50:27,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:27,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117725618] [2022-11-03 01:50:27,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:27,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:30,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:30,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117725618] [2022-11-03 01:50:30,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117725618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:30,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:30,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:50:30,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201142933] [2022-11-03 01:50:30,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:30,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:50:30,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:30,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:50:30,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:50:30,371 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) [2022-11-03 01:50:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:30,521 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2022-11-03 01:50:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:50:30,525 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 [2022-11-03 01:50:30,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:30,534 INFO L225 Difference]: With dead ends: 57 [2022-11-03 01:50:30,535 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 01:50:30,537 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 [2022-11-03 01:50:30,543 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:30,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 38 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:30,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 01:50:30,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2022-11-03 01:50:30,583 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) [2022-11-03 01:50:30,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 41 transitions. [2022-11-03 01:50:30,586 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 41 transitions. Word has length 6 [2022-11-03 01:50:30,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:30,587 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 41 transitions. [2022-11-03 01:50:30,587 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) [2022-11-03 01:50:30,588 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 41 transitions. [2022-11-03 01:50:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:50:30,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:30,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:30,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:50:30,589 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:30,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:30,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1433431498, now seen corresponding path program 1 times [2022-11-03 01:50:30,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:30,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420677923] [2022-11-03 01:50:30,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:30,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:32,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:32,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420677923] [2022-11-03 01:50:32,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420677923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:32,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:32,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:50:32,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976736745] [2022-11-03 01:50:32,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:32,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:32,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:32,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:32,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:32,123 INFO L87 Difference]: Start difference. First operand 26 states and 41 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2022-11-03 01:50:32,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:32,295 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2022-11-03 01:50:32,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:50:32,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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 [2022-11-03 01:50:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:32,296 INFO L225 Difference]: With dead ends: 63 [2022-11-03 01:50:32,297 INFO L226 Difference]: Without dead ends: 44 [2022-11-03 01:50:32,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:50:32,298 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:32,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 40 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-03 01:50:32,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2022-11-03 01:50:32,304 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) [2022-11-03 01:50:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 40 transitions. [2022-11-03 01:50:32,305 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 40 transitions. Word has length 7 [2022-11-03 01:50:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:32,306 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 40 transitions. [2022-11-03 01:50:32,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2022-11-03 01:50:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 40 transitions. [2022-11-03 01:50:32,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:50:32,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:32,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:32,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:50:32,307 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:32,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:32,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1543943940, now seen corresponding path program 1 times [2022-11-03 01:50:32,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:32,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613423775] [2022-11-03 01:50:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:32,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:33,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:33,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613423775] [2022-11-03 01:50:33,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613423775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:33,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:33,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:50:33,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079597313] [2022-11-03 01:50:33,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:33,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:50:33,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:33,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:50:33,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:50:33,386 INFO L87 Difference]: Start difference. First operand 26 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-11-03 01:50:33,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:33,482 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2022-11-03 01:50:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:50:33,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2022-11-03 01:50:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:33,484 INFO L225 Difference]: With dead ends: 57 [2022-11-03 01:50:33,484 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 01:50:33,486 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 [2022-11-03 01:50:33,493 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 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 [2022-11-03 01:50:33,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 45 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:33,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 01:50:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2022-11-03 01:50:33,507 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) [2022-11-03 01:50:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 39 transitions. [2022-11-03 01:50:33,510 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 39 transitions. Word has length 8 [2022-11-03 01:50:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:33,511 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 39 transitions. [2022-11-03 01:50:33,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-11-03 01:50:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 39 transitions. [2022-11-03 01:50:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:50:33,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:33,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:33,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:50:33,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:33,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:33,516 INFO L85 PathProgramCache]: Analyzing trace with hash -669410593, now seen corresponding path program 1 times [2022-11-03 01:50:33,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:33,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836011330] [2022-11-03 01:50:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:33,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:34,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:34,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836011330] [2022-11-03 01:50:34,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836011330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:34,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:34,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:50:34,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078934400] [2022-11-03 01:50:34,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:34,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:50:34,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:34,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:50:34,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:50:34,575 INFO L87 Difference]: Start difference. First operand 26 states and 39 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2022-11-03 01:50:34,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:34,666 INFO L93 Difference]: Finished difference Result 57 states and 85 transitions. [2022-11-03 01:50:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:50:34,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 [2022-11-03 01:50:34,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:34,669 INFO L225 Difference]: With dead ends: 57 [2022-11-03 01:50:34,669 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 01:50:34,670 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 [2022-11-03 01:50:34,679 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:34,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 43 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:34,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 01:50:34,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2022-11-03 01:50:34,690 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) [2022-11-03 01:50:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2022-11-03 01:50:34,692 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 9 [2022-11-03 01:50:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:34,692 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2022-11-03 01:50:34,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2022-11-03 01:50:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2022-11-03 01:50:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:50:34,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:34,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:34,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:50:34,694 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:34,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:34,695 INFO L85 PathProgramCache]: Analyzing trace with hash -533879897, now seen corresponding path program 1 times [2022-11-03 01:50:34,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:34,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533878061] [2022-11-03 01:50:34,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:34,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:35,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:35,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533878061] [2022-11-03 01:50:35,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533878061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:35,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:35,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:50:35,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089057278] [2022-11-03 01:50:35,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:35,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:50:35,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:35,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:50:35,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:50:35,873 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) [2022-11-03 01:50:35,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:35,966 INFO L93 Difference]: Finished difference Result 55 states and 81 transitions. [2022-11-03 01:50:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:50:35,967 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 [2022-11-03 01:50:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:35,970 INFO L225 Difference]: With dead ends: 55 [2022-11-03 01:50:35,970 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 01:50:35,970 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 [2022-11-03 01:50:35,972 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:35,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 42 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 01:50:35,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-11-03 01:50:35,987 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) [2022-11-03 01:50:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2022-11-03 01:50:35,988 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 11 [2022-11-03 01:50:35,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:35,988 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2022-11-03 01:50:35,988 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) [2022-11-03 01:50:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2022-11-03 01:50:35,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 01:50:35,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:35,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:35,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:50:35,994 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:35,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:35,995 INFO L85 PathProgramCache]: Analyzing trace with hash 541607603, now seen corresponding path program 1 times [2022-11-03 01:50:35,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:35,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585785276] [2022-11-03 01:50:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:35,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:36,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:36,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585785276] [2022-11-03 01:50:36,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585785276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:36,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:36,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:50:36,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207662230] [2022-11-03 01:50:36,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:36,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:50:36,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:36,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:50:36,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:50:36,847 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) [2022-11-03 01:50:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:36,913 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2022-11-03 01:50:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:50:36,914 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 [2022-11-03 01:50:36,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:36,915 INFO L225 Difference]: With dead ends: 56 [2022-11-03 01:50:36,915 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 01:50:36,915 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 [2022-11-03 01:50:36,916 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:36,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 57 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 01:50:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2022-11-03 01:50:36,936 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) [2022-11-03 01:50:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2022-11-03 01:50:36,938 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 12 [2022-11-03 01:50:36,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:36,938 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2022-11-03 01:50:36,939 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) [2022-11-03 01:50:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2022-11-03 01:50:36,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:50:36,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:36,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:36,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:50:36,940 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:36,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1989162823, now seen corresponding path program 1 times [2022-11-03 01:50:36,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:36,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151607675] [2022-11-03 01:50:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:36,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:38,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:38,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151607675] [2022-11-03 01:50:38,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151607675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:38,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:38,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:50:38,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656502829] [2022-11-03 01:50:38,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:38,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:50:38,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:38,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:50:38,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:50:38,044 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) [2022-11-03 01:50:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:38,125 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2022-11-03 01:50:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:50:38,125 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 [2022-11-03 01:50:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:38,126 INFO L225 Difference]: With dead ends: 56 [2022-11-03 01:50:38,126 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 01:50:38,127 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 [2022-11-03 01:50:38,129 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:38,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 52 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:38,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 01:50:38,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-11-03 01:50:38,142 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) [2022-11-03 01:50:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-11-03 01:50:38,146 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 14 [2022-11-03 01:50:38,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:38,147 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-11-03 01:50:38,147 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) [2022-11-03 01:50:38,147 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-11-03 01:50:38,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:50:38,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:38,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:38,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:50:38,149 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:38,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:38,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1546254974, now seen corresponding path program 1 times [2022-11-03 01:50:38,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:38,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231575659] [2022-11-03 01:50:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:38,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:38,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:38,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231575659] [2022-11-03 01:50:38,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231575659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:38,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:38,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:38,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604928962] [2022-11-03 01:50:38,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:38,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:38,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:38,390 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) [2022-11-03 01:50:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:38,538 INFO L93 Difference]: Finished difference Result 77 states and 113 transitions. [2022-11-03 01:50:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:38,539 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 [2022-11-03 01:50:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:38,540 INFO L225 Difference]: With dead ends: 77 [2022-11-03 01:50:38,540 INFO L226 Difference]: Without dead ends: 58 [2022-11-03 01:50:38,541 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 [2022-11-03 01:50:38,541 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:38,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 98 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-03 01:50:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-11-03 01:50:38,549 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) [2022-11-03 01:50:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-03 01:50:38,550 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 15 [2022-11-03 01:50:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:38,550 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-03 01:50:38,551 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) [2022-11-03 01:50:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-03 01:50:38,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 01:50:38,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:38,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:38,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 01:50:38,552 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:38,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:38,553 INFO L85 PathProgramCache]: Analyzing trace with hash -191284323, now seen corresponding path program 1 times [2022-11-03 01:50:38,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:38,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793279238] [2022-11-03 01:50:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:38,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:40,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:40,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793279238] [2022-11-03 01:50:40,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793279238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:40,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987328899] [2022-11-03 01:50:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:40,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:40,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:40,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:40,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0315495a-a85c-4df1-8a15-1822e92edbdb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:50:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:41,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 01:50:41,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:56,187 INFO L328 TraceCheckSpWp]: Computing backward predicates...