./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 62ecd4a1c0175e4266d81bf4dd40d6ccadaa828b1b1cbafedab9341484ceff48 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:31:55,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:31:55,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:31:55,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:31:55,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:31:55,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:31:55,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:31:55,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:31:55,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:31:55,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:31:55,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:31:55,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:31:55,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:31:55,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:31:55,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:31:55,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:31:55,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:31:55,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:31:55,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:31:55,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:31:55,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:31:55,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:31:55,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:31:55,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:31:55,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:31:55,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:31:55,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:31:55,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:31:55,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:31:55,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:31:55,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:31:55,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:31:55,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:31:55,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:31:55,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:31:55,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:31:55,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:31:55,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:31:55,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:31:55,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:31:55,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:31:55,258 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:31:55,299 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:31:55,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:31:55,300 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:31:55,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:31:55,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:31:55,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:31:55,301 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:31:55,301 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:31:55,301 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:31:55,301 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:31:55,302 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:31:55,303 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:31:55,303 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:31:55,303 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:31:55,303 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:31:55,303 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:31:55,304 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:31:55,304 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:31:55,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:31:55,305 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:31:55,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:31:55,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:31:55,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:31:55,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:31:55,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:31:55,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:31:55,306 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:31:55,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:31:55,308 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:31:55,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:31:55,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:31:55,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:31:55,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:31:55,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:31:55,309 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:31:55,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:31:55,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:31:55,310 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:31:55,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:31:55,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:31:55,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:31:55,311 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_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62ecd4a1c0175e4266d81bf4dd40d6ccadaa828b1b1cbafedab9341484ceff48 [2022-11-03 03:31:55,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:31:55,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:31:55,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:31:55,722 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:31:55,722 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:31:55,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2022-11-03 03:31:55,807 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI/data/ba0c31f83/7cd0e282d2844e79917bc7a8c90d56bc/FLAGf98da0c6f [2022-11-03 03:31:56,831 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:31:56,831 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2022-11-03 03:31:56,890 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI/data/ba0c31f83/7cd0e282d2844e79917bc7a8c90d56bc/FLAGf98da0c6f [2022-11-03 03:31:57,135 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI/data/ba0c31f83/7cd0e282d2844e79917bc7a8c90d56bc [2022-11-03 03:31:57,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:31:57,140 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:31:57,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:31:57,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:31:57,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:31:57,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:31:57" (1/1) ... [2022-11-03 03:31:57,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@306d99d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:57, skipping insertion in model container [2022-11-03 03:31:57,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:31:57" (1/1) ... [2022-11-03 03:31:57,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:31:57,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:31:58,685 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[40670,40683] [2022-11-03 03:32:02,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:32:02,584 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:32:02,970 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[40670,40683] [2022-11-03 03:32:06,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:32:06,249 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:32:06,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:06 WrapperNode [2022-11-03 03:32:06,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:32:06,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:32:06,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:32:06,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:32:06,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:06" (1/1) ... [2022-11-03 03:32:06,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:06" (1/1) ... [2022-11-03 03:32:06,740 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22651 [2022-11-03 03:32:06,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:32:06,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:32:06,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:32:06,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:32:06,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:06" (1/1) ... [2022-11-03 03:32:06,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:06" (1/1) ... [2022-11-03 03:32:06,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:06" (1/1) ... [2022-11-03 03:32:06,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:06" (1/1) ... [2022-11-03 03:32:07,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:06" (1/1) ... [2022-11-03 03:32:07,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:06" (1/1) ... [2022-11-03 03:32:07,408 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:06" (1/1) ... [2022-11-03 03:32:07,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:06" (1/1) ... [2022-11-03 03:32:07,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:32:07,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:32:07,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:32:07,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:32:07,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:06" (1/1) ... [2022-11-03 03:32:07,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:32:07,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:07,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:32:07,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3ecbc-cbc3-49d4-b98b-b2c94416a3da/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:32:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:32:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:32:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:32:07,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:32:08,414 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:32:08,416 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:32:22,275 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:32:40,012 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:32:40,012 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 03:32:40,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:40 BoogieIcfgContainer [2022-11-03 03:32:40,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:32:40,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:32:40,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:32:40,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:32:40,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:31:57" (1/3) ... [2022-11-03 03:32:40,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dea2897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:32:40, skipping insertion in model container [2022-11-03 03:32:40,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:06" (2/3) ... [2022-11-03 03:32:40,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dea2897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:32:40, skipping insertion in model container [2022-11-03 03:32:40,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:40" (3/3) ... [2022-11-03 03:32:40,043 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2022-11-03 03:32:40,061 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:32:40,061 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:32:40,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:32:40,233 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;@8785d87, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:32:40,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:32:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 5203 states, 5201 states have (on average 1.7035185541242068) internal successors, (8860), 5202 states have internal predecessors, (8860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-11-03 03:32:40,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:40,328 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:40,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash -631458891, now seen corresponding path program 1 times [2022-11-03 03:32:40,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:40,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140525872] [2022-11-03 03:32:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:40,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:41,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:41,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140525872] [2022-11-03 03:32:41,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140525872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:41,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:41,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:41,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180546040] [2022-11-03 03:32:41,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:41,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:41,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:41,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:41,698 INFO L87 Difference]: Start difference. First operand has 5203 states, 5201 states have (on average 1.7035185541242068) internal successors, (8860), 5202 states have internal predecessors, (8860), 0 states have call successors, (0), 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 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:43,528 INFO L93 Difference]: Finished difference Result 10156 states and 17113 transitions. [2022-11-03 03:32:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:43,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 290 [2022-11-03 03:32:43,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:43,593 INFO L225 Difference]: With dead ends: 10156 [2022-11-03 03:32:43,593 INFO L226 Difference]: Without dead ends: 6092 [2022-11-03 03:32:43,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:43,617 INFO L413 NwaCegarLoop]: 7660 mSDtfsCounter, 5749 mSDsluCounter, 4487 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5749 SdHoareTripleChecker+Valid, 12017 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:43,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5749 Valid, 12017 Invalid, 368 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 03:32:43,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6092 states. [2022-11-03 03:32:44,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6092 to 6090. [2022-11-03 03:32:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6090 states, 6089 states have (on average 1.6027262276235834) internal successors, (9759), 6089 states have internal predecessors, (9759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:44,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6090 states to 6090 states and 9759 transitions. [2022-11-03 03:32:44,074 INFO L78 Accepts]: Start accepts. Automaton has 6090 states and 9759 transitions. Word has length 290 [2022-11-03 03:32:44,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:44,080 INFO L495 AbstractCegarLoop]: Abstraction has 6090 states and 9759 transitions. [2022-11-03 03:32:44,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 6090 states and 9759 transitions. [2022-11-03 03:32:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-11-03 03:32:44,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:44,102 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:44,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:32:44,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:44,104 INFO L85 PathProgramCache]: Analyzing trace with hash -457311805, now seen corresponding path program 1 times [2022-11-03 03:32:44,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:44,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54575493] [2022-11-03 03:32:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:44,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:44,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:44,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54575493] [2022-11-03 03:32:44,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54575493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:44,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:44,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:44,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596886661] [2022-11-03 03:32:44,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:44,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:44,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:44,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:44,660 INFO L87 Difference]: Start difference. First operand 6090 states and 9759 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:46,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:46,369 INFO L93 Difference]: Finished difference Result 13214 states and 21306 transitions. [2022-11-03 03:32:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:46,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 300 [2022-11-03 03:32:46,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:46,413 INFO L225 Difference]: With dead ends: 13214 [2022-11-03 03:32:46,414 INFO L226 Difference]: Without dead ends: 7966 [2022-11-03 03:32:46,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:46,434 INFO L413 NwaCegarLoop]: 6972 mSDtfsCounter, 5591 mSDsluCounter, 3654 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5591 SdHoareTripleChecker+Valid, 10505 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:46,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5591 Valid, 10505 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 03:32:46,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2022-11-03 03:32:47,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7964. [2022-11-03 03:32:47,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7964 states, 7963 states have (on average 1.611327389174934) internal successors, (12831), 7963 states have internal predecessors, (12831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:47,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 12831 transitions. [2022-11-03 03:32:47,372 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 12831 transitions. Word has length 300 [2022-11-03 03:32:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:47,375 INFO L495 AbstractCegarLoop]: Abstraction has 7964 states and 12831 transitions. [2022-11-03 03:32:47,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:47,377 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 12831 transitions. [2022-11-03 03:32:47,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-11-03 03:32:47,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:47,396 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:47,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:32:47,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:47,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:47,404 INFO L85 PathProgramCache]: Analyzing trace with hash -498704074, now seen corresponding path program 1 times [2022-11-03 03:32:47,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:47,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080462968] [2022-11-03 03:32:47,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:47,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:47,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:47,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080462968] [2022-11-03 03:32:47,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080462968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:47,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:47,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:47,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841545187] [2022-11-03 03:32:47,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:47,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:47,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:47,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:47,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:47,868 INFO L87 Difference]: Start difference. First operand 7964 states and 12831 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:50,435 INFO L93 Difference]: Finished difference Result 18232 states and 29392 transitions. [2022-11-03 03:32:50,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:50,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 310 [2022-11-03 03:32:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:50,511 INFO L225 Difference]: With dead ends: 18232 [2022-11-03 03:32:50,512 INFO L226 Difference]: Without dead ends: 10973 [2022-11-03 03:32:50,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:50,536 INFO L413 NwaCegarLoop]: 6535 mSDtfsCounter, 5548 mSDsluCounter, 3435 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5548 SdHoareTripleChecker+Valid, 9853 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:50,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5548 Valid, 9853 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 03:32:50,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10973 states. [2022-11-03 03:32:51,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10973 to 10971. [2022-11-03 03:32:51,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10971 states, 10970 states have (on average 1.6080218778486781) internal successors, (17640), 10970 states have internal predecessors, (17640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:51,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10971 states to 10971 states and 17640 transitions. [2022-11-03 03:32:51,594 INFO L78 Accepts]: Start accepts. Automaton has 10971 states and 17640 transitions. Word has length 310 [2022-11-03 03:32:51,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:51,595 INFO L495 AbstractCegarLoop]: Abstraction has 10971 states and 17640 transitions. [2022-11-03 03:32:51,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:51,595 INFO L276 IsEmpty]: Start isEmpty. Operand 10971 states and 17640 transitions. [2022-11-03 03:32:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-11-03 03:32:51,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:51,617 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:51,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:32:51,617 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:51,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:51,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1518785026, now seen corresponding path program 1 times [2022-11-03 03:32:51,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:51,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470688713] [2022-11-03 03:32:51,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:51,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:51,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:51,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470688713] [2022-11-03 03:32:51,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470688713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:51,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:51,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:51,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635399791] [2022-11-03 03:32:51,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:51,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:51,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:51,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:51,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:51,987 INFO L87 Difference]: Start difference. First operand 10971 states and 17640 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:54,655 INFO L93 Difference]: Finished difference Result 25835 states and 41429 transitions. [2022-11-03 03:32:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:54,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 320 [2022-11-03 03:32:54,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:54,707 INFO L225 Difference]: With dead ends: 25835 [2022-11-03 03:32:54,707 INFO L226 Difference]: Without dead ends: 15514 [2022-11-03 03:32:54,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:54,726 INFO L413 NwaCegarLoop]: 6401 mSDtfsCounter, 5446 mSDsluCounter, 3348 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5446 SdHoareTripleChecker+Valid, 9634 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:54,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5446 Valid, 9634 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 03:32:54,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15514 states. [2022-11-03 03:32:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15514 to 15512. [2022-11-03 03:32:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15512 states, 15511 states have (on average 1.5949326284572238) internal successors, (24739), 15511 states have internal predecessors, (24739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15512 states to 15512 states and 24739 transitions. [2022-11-03 03:32:56,001 INFO L78 Accepts]: Start accepts. Automaton has 15512 states and 24739 transitions. Word has length 320 [2022-11-03 03:32:56,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:56,002 INFO L495 AbstractCegarLoop]: Abstraction has 15512 states and 24739 transitions. [2022-11-03 03:32:56,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 15512 states and 24739 transitions. [2022-11-03 03:32:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-11-03 03:32:56,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:56,030 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:56,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:32:56,031 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:56,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1045767483, now seen corresponding path program 1 times [2022-11-03 03:32:56,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:56,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051438555] [2022-11-03 03:32:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:56,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:56,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:56,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051438555] [2022-11-03 03:32:56,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051438555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:56,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:56,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:56,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969031260] [2022-11-03 03:32:56,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:56,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:56,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:56,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:56,515 INFO L87 Difference]: Start difference. First operand 15512 states and 24739 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:00,027 INFO L93 Difference]: Finished difference Result 37232 states and 59176 transitions. [2022-11-03 03:33:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:33:00,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 330 [2022-11-03 03:33:00,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:00,092 INFO L225 Difference]: With dead ends: 37232 [2022-11-03 03:33:00,093 INFO L226 Difference]: Without dead ends: 22356 [2022-11-03 03:33:00,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:33:00,113 INFO L413 NwaCegarLoop]: 8326 mSDtfsCounter, 5384 mSDsluCounter, 3354 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5384 SdHoareTripleChecker+Valid, 11559 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:00,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5384 Valid, 11559 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 03:33:00,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22356 states. [2022-11-03 03:33:01,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22356 to 22354. [2022-11-03 03:33:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22354 states, 22353 states have (on average 1.5738379635843063) internal successors, (35180), 22353 states have internal predecessors, (35180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22354 states to 22354 states and 35180 transitions. [2022-11-03 03:33:01,858 INFO L78 Accepts]: Start accepts. Automaton has 22354 states and 35180 transitions. Word has length 330 [2022-11-03 03:33:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:01,859 INFO L495 AbstractCegarLoop]: Abstraction has 22354 states and 35180 transitions. [2022-11-03 03:33:01,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 22354 states and 35180 transitions. [2022-11-03 03:33:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-11-03 03:33:01,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:01,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:01,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:33:01,895 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:01,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:01,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2100650786, now seen corresponding path program 1 times [2022-11-03 03:33:01,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:01,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883623397] [2022-11-03 03:33:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:01,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:03,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:03,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883623397] [2022-11-03 03:33:03,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883623397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:03,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:03,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:33:03,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823168912] [2022-11-03 03:33:03,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:03,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:33:03,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:03,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:33:03,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:03,763 INFO L87 Difference]: Start difference. First operand 22354 states and 35180 transitions. Second operand has 8 states, 8 states have (on average 42.5) internal successors, (340), 8 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:09,278 INFO L93 Difference]: Finished difference Result 35465 states and 56538 transitions. [2022-11-03 03:33:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:33:09,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 42.5) internal successors, (340), 8 states have internal predecessors, (340), 0 states have call successors, (0), 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 340 [2022-11-03 03:33:09,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:09,368 INFO L225 Difference]: With dead ends: 35465 [2022-11-03 03:33:09,369 INFO L226 Difference]: Without dead ends: 32487 [2022-11-03 03:33:09,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:33:09,384 INFO L413 NwaCegarLoop]: 6984 mSDtfsCounter, 15112 mSDsluCounter, 24970 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15112 SdHoareTripleChecker+Valid, 31277 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:09,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15112 Valid, 31277 Invalid, 1464 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [94 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 03:33:09,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32487 states. [2022-11-03 03:33:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32487 to 25696. [2022-11-03 03:33:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25696 states, 25695 states have (on average 1.5795290912628916) internal successors, (40586), 25695 states have internal predecessors, (40586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25696 states to 25696 states and 40586 transitions. [2022-11-03 03:33:12,130 INFO L78 Accepts]: Start accepts. Automaton has 25696 states and 40586 transitions. Word has length 340 [2022-11-03 03:33:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:12,131 INFO L495 AbstractCegarLoop]: Abstraction has 25696 states and 40586 transitions. [2022-11-03 03:33:12,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 42.5) internal successors, (340), 8 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:12,132 INFO L276 IsEmpty]: Start isEmpty. Operand 25696 states and 40586 transitions. [2022-11-03 03:33:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-11-03 03:33:12,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:12,167 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:12,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:33:12,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:12,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2094729391, now seen corresponding path program 1 times [2022-11-03 03:33:12,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:12,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042042224] [2022-11-03 03:33:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:12,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:13,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:13,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042042224] [2022-11-03 03:33:13,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042042224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:13,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:13,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:33:13,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809790809] [2022-11-03 03:33:13,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:13,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:33:13,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:13,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:33:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:33:13,737 INFO L87 Difference]: Start difference. First operand 25696 states and 40586 transitions. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:20,850 INFO L93 Difference]: Finished difference Result 76612 states and 120993 transitions. [2022-11-03 03:33:20,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:33:20,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 340 [2022-11-03 03:33:20,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:20,962 INFO L225 Difference]: With dead ends: 76612 [2022-11-03 03:33:20,963 INFO L226 Difference]: Without dead ends: 50927 [2022-11-03 03:33:21,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:21,010 INFO L413 NwaCegarLoop]: 6441 mSDtfsCounter, 19466 mSDsluCounter, 6518 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19466 SdHoareTripleChecker+Valid, 12775 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:21,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19466 Valid, 12775 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 03:33:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50927 states. [2022-11-03 03:33:26,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50927 to 50925. [2022-11-03 03:33:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50925 states, 50924 states have (on average 1.5772916503024115) internal successors, (80322), 50924 states have internal predecessors, (80322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50925 states to 50925 states and 80322 transitions. [2022-11-03 03:33:26,897 INFO L78 Accepts]: Start accepts. Automaton has 50925 states and 80322 transitions. Word has length 340 [2022-11-03 03:33:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:26,897 INFO L495 AbstractCegarLoop]: Abstraction has 50925 states and 80322 transitions. [2022-11-03 03:33:26,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 50925 states and 80322 transitions. [2022-11-03 03:33:26,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-11-03 03:33:26,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:26,943 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:26,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:33:26,944 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:26,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:26,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2102876123, now seen corresponding path program 1 times [2022-11-03 03:33:26,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:26,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217628834] [2022-11-03 03:33:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:26,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:27,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:27,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217628834] [2022-11-03 03:33:27,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217628834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:27,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:27,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:33:27,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317832935] [2022-11-03 03:33:27,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:27,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:33:27,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:27,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:33:27,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:33:27,219 INFO L87 Difference]: Start difference. First operand 50925 states and 80322 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)