./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW --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 30f0768bbff34913c5dfb0ad37a2819c04e85c489714efe7283dacc3cb1675b9 --- 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-4e7fbc6 [2022-11-23 14:41:01,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:41:01,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:41:01,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:41:01,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:41:01,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:41:01,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:41:01,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:41:01,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:41:01,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:41:01,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:41:01,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:41:01,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:41:01,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:41:01,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:41:01,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:41:01,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:41:01,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:41:01,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:41:01,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:41:01,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:41:01,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:41:01,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:41:01,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:41:01,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:41:01,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:41:01,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:41:01,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:41:01,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:41:01,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:41:01,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:41:01,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:41:01,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:41:01,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:41:01,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:41:01,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:41:01,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:41:01,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:41:01,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:41:01,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:41:01,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:41:01,197 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:41:01,232 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:41:01,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:41:01,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:41:01,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:41:01,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:41:01,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:41:01,240 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:41:01,240 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:41:01,241 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:41:01,241 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:41:01,242 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:41:01,242 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:41:01,243 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:41:01,243 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:41:01,243 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:41:01,244 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:41:01,244 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:41:01,244 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:41:01,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:41:01,246 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:41:01,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:41:01,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:41:01,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:41:01,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:41:01,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:41:01,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:41:01,248 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:41:01,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:41:01,248 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:41:01,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:41:01,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:41:01,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:41:01,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:41:01,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:41:01,250 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:41:01,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:41:01,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:41:01,251 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:41:01,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:41:01,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:41:01,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:41:01,252 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_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30f0768bbff34913c5dfb0ad37a2819c04e85c489714efe7283dacc3cb1675b9 [2022-11-23 14:41:01,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:41:01,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:41:01,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:41:01,609 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:41:01,610 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:41:01,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-23 14:41:04,692 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:41:04,943 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:41:04,943 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-23 14:41:04,986 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/data/7df7d2000/b3aefd8b52714b5a9523890b1425194e/FLAGca76edce5 [2022-11-23 14:41:05,019 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/data/7df7d2000/b3aefd8b52714b5a9523890b1425194e [2022-11-23 14:41:05,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:41:05,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:41:05,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:41:05,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:41:05,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:41:05,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:41:05" (1/1) ... [2022-11-23 14:41:05,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cd8e031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05, skipping insertion in model container [2022-11-23 14:41:05,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:41:05" (1/1) ... [2022-11-23 14:41:05,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:41:05,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:41:05,343 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9094,9107] [2022-11-23 14:41:05,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:41:05,448 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:41:05,518 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9094,9107] [2022-11-23 14:41:05,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:41:05,590 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:41:05,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05 WrapperNode [2022-11-23 14:41:05,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:41:05,592 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:41:05,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:41:05,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:41:05,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2022-11-23 14:41:05,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2022-11-23 14:41:05,644 INFO L138 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 731 [2022-11-23 14:41:05,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:41:05,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:41:05,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:41:05,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:41:05,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2022-11-23 14:41:05,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2022-11-23 14:41:05,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2022-11-23 14:41:05,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2022-11-23 14:41:05,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2022-11-23 14:41:05,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2022-11-23 14:41:05,714 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2022-11-23 14:41:05,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2022-11-23 14:41:05,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:41:05,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:41:05,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:41:05,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:41:05,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2022-11-23 14:41:05,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:41:05,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:05,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:41:05,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:41:05,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:41:05,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:41:05,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:41:05,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:41:06,033 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:41:06,035 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:41:06,777 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:41:07,004 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:41:07,004 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:41:07,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:41:07 BoogieIcfgContainer [2022-11-23 14:41:07,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:41:07,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:41:07,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:41:07,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:41:07,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:41:05" (1/3) ... [2022-11-23 14:41:07,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cf8ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:41:07, skipping insertion in model container [2022-11-23 14:41:07,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (2/3) ... [2022-11-23 14:41:07,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cf8ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:41:07, skipping insertion in model container [2022-11-23 14:41:07,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:41:07" (3/3) ... [2022-11-23 14:41:07,028 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-23 14:41:07,049 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:41:07,049 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:41:07,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:41:07,121 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;@43efad63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:41:07,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:41:07,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 122 states have (on average 1.7704918032786885) internal successors, (216), 123 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:07,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 14:41:07,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:07,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:07,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:07,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:07,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1269394098, now seen corresponding path program 1 times [2022-11-23 14:41:07,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:07,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796377940] [2022-11-23 14:41:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:07,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:41:07,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:07,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796377940] [2022-11-23 14:41:07,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796377940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:07,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:07,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:41:07,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378321933] [2022-11-23 14:41:07,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:07,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:41:07,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:07,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:41:07,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:41:07,945 INFO L87 Difference]: Start difference. First operand has 124 states, 122 states have (on average 1.7704918032786885) internal successors, (216), 123 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:08,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:08,244 INFO L93 Difference]: Finished difference Result 191 states and 317 transitions. [2022-11-23 14:41:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:41:08,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-23 14:41:08,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:08,256 INFO L225 Difference]: With dead ends: 191 [2022-11-23 14:41:08,256 INFO L226 Difference]: Without dead ends: 122 [2022-11-23 14:41:08,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:41:08,262 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 506 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:08,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 197 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:41:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-23 14:41:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-23 14:41:08,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 121 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2022-11-23 14:41:08,313 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 77 [2022-11-23 14:41:08,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:08,313 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2022-11-23 14:41:08,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:08,314 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2022-11-23 14:41:08,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 14:41:08,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:08,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:08,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:41:08,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:08,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:08,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1646034187, now seen corresponding path program 1 times [2022-11-23 14:41:08,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:08,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648780695] [2022-11-23 14:41:08,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:08,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:41:08,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:08,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648780695] [2022-11-23 14:41:08,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648780695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:08,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:08,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:41:08,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470526884] [2022-11-23 14:41:08,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:08,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:41:08,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:08,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:41:08,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:41:08,592 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:08,764 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2022-11-23 14:41:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:41:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2022-11-23 14:41:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:08,770 INFO L225 Difference]: With dead ends: 191 [2022-11-23 14:41:08,770 INFO L226 Difference]: Without dead ends: 122 [2022-11-23 14:41:08,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:41:08,778 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 362 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:08,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 92 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:41:08,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-23 14:41:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-23 14:41:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1983471074380165) internal successors, (145), 121 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2022-11-23 14:41:08,807 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 78 [2022-11-23 14:41:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:08,810 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2022-11-23 14:41:08,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:08,810 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2022-11-23 14:41:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 14:41:08,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:08,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:08,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:41:08,820 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:08,821 INFO L85 PathProgramCache]: Analyzing trace with hash -513507090, now seen corresponding path program 1 times [2022-11-23 14:41:08,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:08,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193102362] [2022-11-23 14:41:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:08,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:41:09,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:09,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193102362] [2022-11-23 14:41:09,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193102362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:09,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:09,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:41:09,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009893536] [2022-11-23 14:41:09,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:09,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:41:09,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:09,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:41:09,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:41:09,068 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:09,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:09,202 INFO L93 Difference]: Finished difference Result 187 states and 230 transitions. [2022-11-23 14:41:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:41:09,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2022-11-23 14:41:09,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:09,205 INFO L225 Difference]: With dead ends: 187 [2022-11-23 14:41:09,205 INFO L226 Difference]: Without dead ends: 122 [2022-11-23 14:41:09,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:41:09,214 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 344 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:09,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 100 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:41:09,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-23 14:41:09,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-23 14:41:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1818181818181819) internal successors, (143), 121 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-11-23 14:41:09,238 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 79 [2022-11-23 14:41:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:09,239 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-11-23 14:41:09,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-11-23 14:41:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-23 14:41:09,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:09,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:09,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:41:09,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:09,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:09,244 INFO L85 PathProgramCache]: Analyzing trace with hash -540998025, now seen corresponding path program 1 times [2022-11-23 14:41:09,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:09,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338048706] [2022-11-23 14:41:09,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:09,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:41:09,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:09,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338048706] [2022-11-23 14:41:09,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338048706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:09,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:09,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:41:09,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936079399] [2022-11-23 14:41:09,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:09,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:41:09,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:09,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:41:09,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:41:09,446 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:09,585 INFO L93 Difference]: Finished difference Result 195 states and 235 transitions. [2022-11-23 14:41:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:41:09,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2022-11-23 14:41:09,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:09,589 INFO L225 Difference]: With dead ends: 195 [2022-11-23 14:41:09,589 INFO L226 Difference]: Without dead ends: 122 [2022-11-23 14:41:09,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:41:09,599 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 361 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:09,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 84 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:41:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-23 14:41:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-23 14:41:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.165289256198347) internal successors, (141), 121 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2022-11-23 14:41:09,624 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 80 [2022-11-23 14:41:09,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:09,624 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2022-11-23 14:41:09,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:09,625 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2022-11-23 14:41:09,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 14:41:09,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:09,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:09,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:41:09,628 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:09,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1188164518, now seen corresponding path program 1 times [2022-11-23 14:41:09,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:09,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446862694] [2022-11-23 14:41:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:09,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:41:09,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:09,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446862694] [2022-11-23 14:41:09,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446862694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:09,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:09,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:41:09,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299591001] [2022-11-23 14:41:09,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:09,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:41:09,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:09,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:41:09,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:41:09,798 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:09,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:09,938 INFO L93 Difference]: Finished difference Result 199 states and 236 transitions. [2022-11-23 14:41:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:41:09,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2022-11-23 14:41:09,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:09,940 INFO L225 Difference]: With dead ends: 199 [2022-11-23 14:41:09,940 INFO L226 Difference]: Without dead ends: 122 [2022-11-23 14:41:09,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:41:09,943 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 304 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:09,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 103 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:41:09,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-23 14:41:09,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-23 14:41:09,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1570247933884297) internal successors, (140), 121 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:09,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2022-11-23 14:41:09,978 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 81 [2022-11-23 14:41:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:09,979 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2022-11-23 14:41:09,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:09,979 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2022-11-23 14:41:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 14:41:09,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:09,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:09,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:41:09,988 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:09,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash 645623011, now seen corresponding path program 1 times [2022-11-23 14:41:09,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:09,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636260428] [2022-11-23 14:41:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:09,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:41:10,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:10,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636260428] [2022-11-23 14:41:10,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636260428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:10,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:10,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:41:10,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144209938] [2022-11-23 14:41:10,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:10,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:41:10,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:41:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:41:10,156 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:10,278 INFO L93 Difference]: Finished difference Result 179 states and 214 transitions. [2022-11-23 14:41:10,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:41:10,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-23 14:41:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:10,280 INFO L225 Difference]: With dead ends: 179 [2022-11-23 14:41:10,280 INFO L226 Difference]: Without dead ends: 122 [2022-11-23 14:41:10,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:41:10,281 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 303 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:10,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 116 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:41:10,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-23 14:41:10,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-23 14:41:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.140495867768595) internal successors, (138), 121 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 138 transitions. [2022-11-23 14:41:10,299 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 138 transitions. Word has length 82 [2022-11-23 14:41:10,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:10,299 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 138 transitions. [2022-11-23 14:41:10,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:10,300 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 138 transitions. [2022-11-23 14:41:10,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-23 14:41:10,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:10,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:10,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:41:10,301 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:10,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:10,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1891597942, now seen corresponding path program 1 times [2022-11-23 14:41:10,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:10,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926872765] [2022-11-23 14:41:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:10,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:41:26,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:26,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926872765] [2022-11-23 14:41:26,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926872765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:26,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:26,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-11-23 14:41:26,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361528238] [2022-11-23 14:41:26,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:26,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-23 14:41:26,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:26,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-23 14:41:26,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1735, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 14:41:26,816 INFO L87 Difference]: Start difference. First operand 122 states and 138 transitions. Second operand has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:51,505 INFO L93 Difference]: Finished difference Result 292 states and 368 transitions. [2022-11-23 14:41:51,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-23 14:41:51,506 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-11-23 14:41:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:51,508 INFO L225 Difference]: With dead ends: 292 [2022-11-23 14:41:51,508 INFO L226 Difference]: Without dead ends: 248 [2022-11-23 14:41:51,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1486, Invalid=5320, Unknown=0, NotChecked=0, Total=6806 [2022-11-23 14:41:51,511 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1120 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 3443 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 3461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:51,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1120 Valid, 1576 Invalid, 3461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3443 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-23 14:41:51,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-23 14:41:51,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 161. [2022-11-23 14:41:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.19375) internal successors, (191), 160 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:51,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2022-11-23 14:41:51,554 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 83 [2022-11-23 14:41:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:51,555 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2022-11-23 14:41:51,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2022-11-23 14:41:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-23 14:41:51,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:51,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:51,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:41:51,557 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:51,558 INFO L85 PathProgramCache]: Analyzing trace with hash -71974936, now seen corresponding path program 1 times [2022-11-23 14:41:51,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:51,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208505223] [2022-11-23 14:41:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:51,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:41:51,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:51,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208505223] [2022-11-23 14:41:51,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208505223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:51,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:51,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:41:51,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837270470] [2022-11-23 14:41:51,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:51,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:41:51,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:51,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:41:51,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:41:51,818 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:51,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:51,956 INFO L93 Difference]: Finished difference Result 327 states and 417 transitions. [2022-11-23 14:41:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:41:51,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-11-23 14:41:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:51,958 INFO L225 Difference]: With dead ends: 327 [2022-11-23 14:41:51,958 INFO L226 Difference]: Without dead ends: 244 [2022-11-23 14:41:51,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:41:51,960 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 56 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:51,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 363 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:41:51,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-23 14:41:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2022-11-23 14:41:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.2531120331950207) internal successors, (302), 241 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 302 transitions. [2022-11-23 14:41:52,028 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 302 transitions. Word has length 85 [2022-11-23 14:41:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:52,029 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 302 transitions. [2022-11-23 14:41:52,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 302 transitions. [2022-11-23 14:41:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-23 14:41:52,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:52,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:52,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:41:52,031 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:52,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:52,031 INFO L85 PathProgramCache]: Analyzing trace with hash 158518031, now seen corresponding path program 1 times [2022-11-23 14:41:52,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:52,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438751533] [2022-11-23 14:41:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:07,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:07,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438751533] [2022-11-23 14:42:07,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438751533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:07,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:07,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-11-23 14:42:07,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58595852] [2022-11-23 14:42:07,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:07,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-23 14:42:07,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:07,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-23 14:42:07,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1808, Unknown=0, NotChecked=0, Total=1980 [2022-11-23 14:42:07,725 INFO L87 Difference]: Start difference. First operand 242 states and 302 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:30,121 INFO L93 Difference]: Finished difference Result 491 states and 641 transitions. [2022-11-23 14:42:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-23 14:42:30,122 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-11-23 14:42:30,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:30,123 INFO L225 Difference]: With dead ends: 491 [2022-11-23 14:42:30,124 INFO L226 Difference]: Without dead ends: 327 [2022-11-23 14:42:30,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=1408, Invalid=4598, Unknown=0, NotChecked=0, Total=6006 [2022-11-23 14:42:30,127 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 1062 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 2633 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:30,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1062 Valid, 1250 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2633 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-23 14:42:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-23 14:42:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 325. [2022-11-23 14:42:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.2777777777777777) internal successors, (414), 324 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 414 transitions. [2022-11-23 14:42:30,224 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 414 transitions. Word has length 85 [2022-11-23 14:42:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:30,225 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 414 transitions. [2022-11-23 14:42:30,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:30,225 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 414 transitions. [2022-11-23 14:42:30,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-23 14:42:30,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:30,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:30,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:42:30,227 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:30,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:30,227 INFO L85 PathProgramCache]: Analyzing trace with hash 630767134, now seen corresponding path program 1 times [2022-11-23 14:42:30,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:30,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034358516] [2022-11-23 14:42:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:30,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:30,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:30,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034358516] [2022-11-23 14:42:30,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034358516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:30,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:30,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:42:30,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053275622] [2022-11-23 14:42:30,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:30,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:42:30,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:30,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:42:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:30,503 INFO L87 Difference]: Start difference. First operand 325 states and 414 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:30,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:30,831 INFO L93 Difference]: Finished difference Result 635 states and 831 transitions. [2022-11-23 14:42:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:42:30,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2022-11-23 14:42:30,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:30,833 INFO L225 Difference]: With dead ends: 635 [2022-11-23 14:42:30,834 INFO L226 Difference]: Without dead ends: 510 [2022-11-23 14:42:30,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:42:30,835 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 287 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:30,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 710 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:30,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-11-23 14:42:30,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 282. [2022-11-23 14:42:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.2597864768683273) internal successors, (354), 281 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 354 transitions. [2022-11-23 14:42:30,930 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 354 transitions. Word has length 86 [2022-11-23 14:42:30,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:30,930 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 354 transitions. [2022-11-23 14:42:30,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 354 transitions. [2022-11-23 14:42:30,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 14:42:30,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:30,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:30,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:42:30,932 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:30,933 INFO L85 PathProgramCache]: Analyzing trace with hash 627708026, now seen corresponding path program 1 times [2022-11-23 14:42:30,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:30,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738057201] [2022-11-23 14:42:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:30,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:31,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:31,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738057201] [2022-11-23 14:42:31,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738057201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:31,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:31,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:42:31,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026069643] [2022-11-23 14:42:31,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:31,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:31,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:31,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:31,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:31,097 INFO L87 Difference]: Start difference. First operand 282 states and 354 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:31,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:31,252 INFO L93 Difference]: Finished difference Result 556 states and 727 transitions. [2022-11-23 14:42:31,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:31,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2022-11-23 14:42:31,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:31,254 INFO L225 Difference]: With dead ends: 556 [2022-11-23 14:42:31,254 INFO L226 Difference]: Without dead ends: 352 [2022-11-23 14:42:31,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:31,255 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 51 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:31,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 280 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:31,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-23 14:42:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 334. [2022-11-23 14:42:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.2672672672672673) internal successors, (422), 333 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:31,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 422 transitions. [2022-11-23 14:42:31,367 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 422 transitions. Word has length 101 [2022-11-23 14:42:31,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:31,368 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 422 transitions. [2022-11-23 14:42:31,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:31,368 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 422 transitions. [2022-11-23 14:42:31,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-23 14:42:31,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:31,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:31,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:42:31,370 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:31,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:31,370 INFO L85 PathProgramCache]: Analyzing trace with hash -153234882, now seen corresponding path program 1 times [2022-11-23 14:42:31,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:31,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939293391] [2022-11-23 14:42:31,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:31,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:31,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:31,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939293391] [2022-11-23 14:42:31,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939293391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:31,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:31,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:42:31,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154107855] [2022-11-23 14:42:31,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:31,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:31,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:31,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:31,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:31,532 INFO L87 Difference]: Start difference. First operand 334 states and 422 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:31,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:31,758 INFO L93 Difference]: Finished difference Result 758 states and 998 transitions. [2022-11-23 14:42:31,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:31,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2022-11-23 14:42:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:31,761 INFO L225 Difference]: With dead ends: 758 [2022-11-23 14:42:31,761 INFO L226 Difference]: Without dead ends: 506 [2022-11-23 14:42:31,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:31,763 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 46 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:31,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 274 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:31,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-23 14:42:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 480. [2022-11-23 14:42:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2964509394572026) internal successors, (621), 479 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 621 transitions. [2022-11-23 14:42:31,926 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 621 transitions. Word has length 104 [2022-11-23 14:42:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:31,926 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 621 transitions. [2022-11-23 14:42:31,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 621 transitions. [2022-11-23 14:42:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-23 14:42:31,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:31,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:31,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:42:31,928 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:31,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:31,929 INFO L85 PathProgramCache]: Analyzing trace with hash -968341393, now seen corresponding path program 1 times [2022-11-23 14:42:31,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:31,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889349171] [2022-11-23 14:42:31,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:31,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:32,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:32,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889349171] [2022-11-23 14:42:32,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889349171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:32,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:32,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:42:32,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502818765] [2022-11-23 14:42:32,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:32,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:32,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:32,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:32,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:32,083 INFO L87 Difference]: Start difference. First operand 480 states and 621 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:32,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:32,410 INFO L93 Difference]: Finished difference Result 1214 states and 1619 transitions. [2022-11-23 14:42:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:32,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 107 [2022-11-23 14:42:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:32,417 INFO L225 Difference]: With dead ends: 1214 [2022-11-23 14:42:32,417 INFO L226 Difference]: Without dead ends: 816 [2022-11-23 14:42:32,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:32,419 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 41 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:32,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 267 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:32,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-11-23 14:42:32,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 778. [2022-11-23 14:42:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.3191763191763193) internal successors, (1025), 777 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1025 transitions. [2022-11-23 14:42:32,710 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1025 transitions. Word has length 107 [2022-11-23 14:42:32,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:32,711 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 1025 transitions. [2022-11-23 14:42:32,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1025 transitions. [2022-11-23 14:42:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-23 14:42:32,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:32,713 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:32,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:42:32,713 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:32,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1044275033, now seen corresponding path program 1 times [2022-11-23 14:42:32,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:32,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116145351] [2022-11-23 14:42:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:32,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:32,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:32,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116145351] [2022-11-23 14:42:32,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116145351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:32,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:32,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:42:32,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181344231] [2022-11-23 14:42:32,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:32,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:32,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:32,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:32,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:32,873 INFO L87 Difference]: Start difference. First operand 778 states and 1025 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:33,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:33,433 INFO L93 Difference]: Finished difference Result 2126 states and 2855 transitions. [2022-11-23 14:42:33,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:33,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2022-11-23 14:42:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:33,439 INFO L225 Difference]: With dead ends: 2126 [2022-11-23 14:42:33,439 INFO L226 Difference]: Without dead ends: 1430 [2022-11-23 14:42:33,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:33,441 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 36 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:33,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 260 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-11-23 14:42:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1368. [2022-11-23 14:42:33,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 1.332114118507681) internal successors, (1821), 1367 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1821 transitions. [2022-11-23 14:42:33,809 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1821 transitions. Word has length 110 [2022-11-23 14:42:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:33,809 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 1821 transitions. [2022-11-23 14:42:33,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1821 transitions. [2022-11-23 14:42:33,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 14:42:33,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:33,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:33,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:42:33,812 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:33,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:33,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2140177647, now seen corresponding path program 1 times [2022-11-23 14:42:33,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:33,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292261459] [2022-11-23 14:42:33,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:33,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:33,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:33,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292261459] [2022-11-23 14:42:33,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292261459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:33,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:33,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:42:33,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318239976] [2022-11-23 14:42:33,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:33,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:33,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:33,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:33,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:33,962 INFO L87 Difference]: Start difference. First operand 1368 states and 1821 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:34,949 INFO L93 Difference]: Finished difference Result 3914 states and 5267 transitions. [2022-11-23 14:42:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:34,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2022-11-23 14:42:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:34,966 INFO L225 Difference]: With dead ends: 3914 [2022-11-23 14:42:34,966 INFO L226 Difference]: Without dead ends: 2628 [2022-11-23 14:42:34,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:34,969 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 31 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:34,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 253 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2022-11-23 14:42:35,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2518. [2022-11-23 14:42:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2517 states have (on average 1.3369090186730235) internal successors, (3365), 2517 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 3365 transitions. [2022-11-23 14:42:35,692 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 3365 transitions. Word has length 113 [2022-11-23 14:42:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:35,692 INFO L495 AbstractCegarLoop]: Abstraction has 2518 states and 3365 transitions. [2022-11-23 14:42:35,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 3365 transitions. [2022-11-23 14:42:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-23 14:42:35,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:35,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:35,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 14:42:35,695 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:35,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:35,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1258154352, now seen corresponding path program 1 times [2022-11-23 14:42:35,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:35,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172305212] [2022-11-23 14:42:35,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:35,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:35,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:35,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172305212] [2022-11-23 14:42:35,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172305212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:35,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:35,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:42:35,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222667032] [2022-11-23 14:42:35,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:35,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:35,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:35,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:35,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:35,855 INFO L87 Difference]: Start difference. First operand 2518 states and 3365 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:37,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:37,559 INFO L93 Difference]: Finished difference Result 7382 states and 9923 transitions. [2022-11-23 14:42:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:37,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-11-23 14:42:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:37,576 INFO L225 Difference]: With dead ends: 7382 [2022-11-23 14:42:37,576 INFO L226 Difference]: Without dead ends: 4946 [2022-11-23 14:42:37,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:37,581 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 26 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:37,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 242 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2022-11-23 14:42:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 4740. [2022-11-23 14:42:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4740 states, 4739 states have (on average 1.33635788140958) internal successors, (6333), 4739 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4740 states to 4740 states and 6333 transitions. [2022-11-23 14:42:39,042 INFO L78 Accepts]: Start accepts. Automaton has 4740 states and 6333 transitions. Word has length 116 [2022-11-23 14:42:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:39,043 INFO L495 AbstractCegarLoop]: Abstraction has 4740 states and 6333 transitions. [2022-11-23 14:42:39,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:39,043 INFO L276 IsEmpty]: Start isEmpty. Operand 4740 states and 6333 transitions. [2022-11-23 14:42:39,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-23 14:42:39,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:39,045 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:39,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 14:42:39,046 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:39,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:39,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1922414867, now seen corresponding path program 1 times [2022-11-23 14:42:39,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:39,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170856988] [2022-11-23 14:42:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:39,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:42:39,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:39,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170856988] [2022-11-23 14:42:39,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170856988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:39,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:39,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:42:39,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333761876] [2022-11-23 14:42:39,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:39,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:42:39,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:39,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:42:39,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:39,520 INFO L87 Difference]: Start difference. First operand 4740 states and 6333 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:40,862 INFO L93 Difference]: Finished difference Result 9398 states and 12584 transitions. [2022-11-23 14:42:40,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:42:40,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2022-11-23 14:42:40,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:40,877 INFO L225 Difference]: With dead ends: 9398 [2022-11-23 14:42:40,877 INFO L226 Difference]: Without dead ends: 4740 [2022-11-23 14:42:40,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:42:40,891 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 385 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:40,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 103 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4740 states. [2022-11-23 14:42:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4740 to 4740. [2022-11-23 14:42:42,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4740 states, 4739 states have (on average 1.3025954842793839) internal successors, (6173), 4739 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4740 states to 4740 states and 6173 transitions. [2022-11-23 14:42:42,544 INFO L78 Accepts]: Start accepts. Automaton has 4740 states and 6173 transitions. Word has length 137 [2022-11-23 14:42:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:42,544 INFO L495 AbstractCegarLoop]: Abstraction has 4740 states and 6173 transitions. [2022-11-23 14:42:42,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:42,545 INFO L276 IsEmpty]: Start isEmpty. Operand 4740 states and 6173 transitions. [2022-11-23 14:42:42,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-23 14:42:42,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:42,547 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:42,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 14:42:42,547 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:42,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:42,548 INFO L85 PathProgramCache]: Analyzing trace with hash -509506290, now seen corresponding path program 1 times [2022-11-23 14:42:42,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:42,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399065132] [2022-11-23 14:42:42,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:42,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:14,535 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 349 DAG size of output: 348 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:45:47,149 WARN L233 SmtUtils]: Spent 17.65s on a formula simplification. DAG size of input: 349 DAG size of output: 346 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:46:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:52,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:52,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399065132] [2022-11-23 14:46:52,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399065132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:46:52,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782487883] [2022-11-23 14:46:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:52,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:52,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:46:52,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:46:52,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e66f2c6-b1dd-45e6-9d9a-5624bf9a799c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:46:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:52,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 155 conjunts are in the unsatisfiable core [2022-11-23 14:46:52,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:14,627 WARN L233 SmtUtils]: Spent 22.71s on a formula simplification. DAG size of input: 243 DAG size of output: 239 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)