./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7 --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 dcec1ccd806a412efdabd457261f7c023005f550a4699f0a865a5aa2d5f9f4d9 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:47:14,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:47:14,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:47:14,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:47:14,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:47:14,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:47:14,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:47:14,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:47:14,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:47:14,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:47:14,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:47:14,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:47:14,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:47:14,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:47:14,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:47:14,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:47:14,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:47:14,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:47:14,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:47:14,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:47:14,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:47:14,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:47:14,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:47:14,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:47:14,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:47:14,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:47:14,203 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:47:14,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:47:14,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:47:14,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:47:14,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:47:14,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:47:14,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:47:14,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:47:14,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:47:14,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:47:14,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:47:14,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:47:14,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:47:14,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:47:14,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:47:14,221 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:47:14,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:47:14,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:47:14,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:47:14,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:47:14,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:47:14,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:47:14,291 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:47:14,292 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:47:14,292 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:47:14,292 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:47:14,294 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:47:14,294 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:47:14,294 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:47:14,295 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:47:14,295 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:47:14,295 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:47:14,295 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:47:14,296 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:47:14,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:47:14,297 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:47:14,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:47:14,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:47:14,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:47:14,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:47:14,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:47:14,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:47:14,301 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:47:14,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:47:14,302 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:47:14,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:47:14,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:47:14,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:47:14,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:47:14,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:47:14,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:47:14,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:47:14,304 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:47:14,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:47:14,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:47:14,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:47:14,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:47:14,306 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dcec1ccd806a412efdabd457261f7c023005f550a4699f0a865a5aa2d5f9f4d9 [2021-11-25 18:47:14,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:47:14,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:47:14,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:47:14,742 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:47:14,743 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:47:14,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-25 18:47:14,830 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/data/8b0b3b828/703294fccc1644f7a2227b20cdb56032/FLAG299871ea4 [2021-11-25 18:47:15,529 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:47:15,529 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-25 18:47:15,543 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/data/8b0b3b828/703294fccc1644f7a2227b20cdb56032/FLAG299871ea4 [2021-11-25 18:47:15,775 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/data/8b0b3b828/703294fccc1644f7a2227b20cdb56032 [2021-11-25 18:47:15,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:47:15,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:47:15,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:47:15,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:47:15,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:47:15,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:47:15" (1/1) ... [2021-11-25 18:47:15,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f108d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:47:15, skipping insertion in model container [2021-11-25 18:47:15,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:47:15" (1/1) ... [2021-11-25 18:47:15,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:47:15,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:47:16,175 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_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5375,5388] [2021-11-25 18:47:16,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:47:16,272 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:47:16,349 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_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5375,5388] [2021-11-25 18:47:16,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:47:16,424 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:47:16,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:47:16 WrapperNode [2021-11-25 18:47:16,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:47:16,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:47:16,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:47:16,427 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:47:16,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:47:16" (1/1) ... [2021-11-25 18:47:16,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:47:16" (1/1) ... [2021-11-25 18:47:16,535 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 422 [2021-11-25 18:47:16,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:47:16,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:47:16,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:47:16,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:47:16,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:47:16" (1/1) ... [2021-11-25 18:47:16,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:47:16" (1/1) ... [2021-11-25 18:47:16,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:47:16" (1/1) ... [2021-11-25 18:47:16,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:47:16" (1/1) ... [2021-11-25 18:47:16,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:47:16" (1/1) ... [2021-11-25 18:47:16,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:47:16" (1/1) ... [2021-11-25 18:47:16,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:47:16" (1/1) ... [2021-11-25 18:47:16,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:47:16,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:47:16,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:47:16,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:47:16,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:47:16" (1/1) ... [2021-11-25 18:47:16,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:47:16,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:47:16,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:47:16,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:47:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:47:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:47:16,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:47:16,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:47:16,928 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:47:16,930 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:47:17,560 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:47:17,844 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:47:17,844 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:47:17,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:47:17 BoogieIcfgContainer [2021-11-25 18:47:17,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:47:17,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:47:17,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:47:17,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:47:17,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:47:15" (1/3) ... [2021-11-25 18:47:17,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be4fb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:47:17, skipping insertion in model container [2021-11-25 18:47:17,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:47:16" (2/3) ... [2021-11-25 18:47:17,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be4fb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:47:17, skipping insertion in model container [2021-11-25 18:47:17,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:47:17" (3/3) ... [2021-11-25 18:47:17,864 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-25 18:47:17,878 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:47:17,878 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:47:17,937 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:47:17,944 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:47:17,945 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:47:17,965 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 82 states have (on average 1.670731707317073) internal successors, (137), 83 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 18:47:17,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:17,974 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:47:17,974 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:17,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2023666919, now seen corresponding path program 1 times [2021-11-25 18:47:18,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:18,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100414372] [2021-11-25 18:47:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:18,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:47:18,544 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:18,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100414372] [2021-11-25 18:47:18,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100414372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:18,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:47:18,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:47:18,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653309629] [2021-11-25 18:47:18,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:18,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:47:18,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:18,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:47:18,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:47:18,604 INFO L87 Difference]: Start difference. First operand has 84 states, 82 states have (on average 1.670731707317073) internal successors, (137), 83 states have internal predecessors, (137), 0 states have call successors, (0), 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 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:18,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:18,759 INFO L93 Difference]: Finished difference Result 189 states and 292 transitions. [2021-11-25 18:47:18,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:47:18,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-25 18:47:18,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:18,782 INFO L225 Difference]: With dead ends: 189 [2021-11-25 18:47:18,782 INFO L226 Difference]: Without dead ends: 127 [2021-11-25 18:47:18,787 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:47:18,792 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 101 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:18,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 259 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:47:18,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-25 18:47:18,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-11-25 18:47:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.4112903225806452) internal successors, (175), 124 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 175 transitions. [2021-11-25 18:47:18,862 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 175 transitions. Word has length 37 [2021-11-25 18:47:18,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:18,863 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 175 transitions. [2021-11-25 18:47:18,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 175 transitions. [2021-11-25 18:47:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 18:47:18,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:18,866 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:47:18,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:47:18,867 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:18,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:18,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1640261836, now seen corresponding path program 1 times [2021-11-25 18:47:18,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:18,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963193651] [2021-11-25 18:47:18,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:18,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:47:18,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:18,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963193651] [2021-11-25 18:47:18,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963193651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:18,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:47:18,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:47:18,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579578321] [2021-11-25 18:47:18,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:18,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:47:18,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:18,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:47:18,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:47:18,996 INFO L87 Difference]: Start difference. First operand 125 states and 175 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:19,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:19,113 INFO L93 Difference]: Finished difference Result 301 states and 439 transitions. [2021-11-25 18:47:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:47:19,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-25 18:47:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:19,118 INFO L225 Difference]: With dead ends: 301 [2021-11-25 18:47:19,122 INFO L226 Difference]: Without dead ends: 202 [2021-11-25 18:47:19,123 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:47:19,127 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 76 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:19,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 214 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:47:19,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-25 18:47:19,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-11-25 18:47:19,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.4422110552763818) internal successors, (287), 199 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:19,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 287 transitions. [2021-11-25 18:47:19,216 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 287 transitions. Word has length 40 [2021-11-25 18:47:19,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:19,217 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 287 transitions. [2021-11-25 18:47:19,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:19,218 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 287 transitions. [2021-11-25 18:47:19,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 18:47:19,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:19,220 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:47:19,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:47:19,221 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:19,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:19,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2012514755, now seen corresponding path program 1 times [2021-11-25 18:47:19,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:19,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660942647] [2021-11-25 18:47:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:19,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:47:19,372 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:19,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660942647] [2021-11-25 18:47:19,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660942647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:19,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:47:19,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:47:19,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406144998] [2021-11-25 18:47:19,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:19,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:47:19,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:47:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:47:19,377 INFO L87 Difference]: Start difference. First operand 200 states and 287 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:19,468 INFO L93 Difference]: Finished difference Result 504 states and 741 transitions. [2021-11-25 18:47:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:47:19,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-25 18:47:19,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:19,475 INFO L225 Difference]: With dead ends: 504 [2021-11-25 18:47:19,476 INFO L226 Difference]: Without dead ends: 330 [2021-11-25 18:47:19,478 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:47:19,480 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 71 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:19,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 199 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:47:19,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-25 18:47:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2021-11-25 18:47:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.452599388379205) internal successors, (475), 327 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 475 transitions. [2021-11-25 18:47:19,532 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 475 transitions. Word has length 43 [2021-11-25 18:47:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:19,533 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 475 transitions. [2021-11-25 18:47:19,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 475 transitions. [2021-11-25 18:47:19,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 18:47:19,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:19,537 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:47:19,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:47:19,537 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:19,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:19,539 INFO L85 PathProgramCache]: Analyzing trace with hash 125802477, now seen corresponding path program 1 times [2021-11-25 18:47:19,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:19,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776736955] [2021-11-25 18:47:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:19,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:47:19,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:19,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776736955] [2021-11-25 18:47:19,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776736955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:19,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:47:19,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:47:19,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510955228] [2021-11-25 18:47:19,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:19,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:47:19,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:19,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:47:19,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:47:19,653 INFO L87 Difference]: Start difference. First operand 328 states and 475 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:19,766 INFO L93 Difference]: Finished difference Result 844 states and 1237 transitions. [2021-11-25 18:47:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:47:19,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-11-25 18:47:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:19,772 INFO L225 Difference]: With dead ends: 844 [2021-11-25 18:47:19,772 INFO L226 Difference]: Without dead ends: 542 [2021-11-25 18:47:19,775 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:47:19,777 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 66 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:19,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 184 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:47:19,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-25 18:47:19,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2021-11-25 18:47:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.4452690166975881) internal successors, (779), 539 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 779 transitions. [2021-11-25 18:47:19,858 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 779 transitions. Word has length 46 [2021-11-25 18:47:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:19,860 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 779 transitions. [2021-11-25 18:47:19,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 779 transitions. [2021-11-25 18:47:19,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:47:19,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:19,872 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:47:19,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:47:19,872 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:19,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:19,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1177829407, now seen corresponding path program 1 times [2021-11-25 18:47:19,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:19,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095197620] [2021-11-25 18:47:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:19,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:47:20,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:20,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095197620] [2021-11-25 18:47:20,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095197620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:20,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:47:20,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:47:20,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856844146] [2021-11-25 18:47:20,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:20,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:47:20,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:20,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:47:20,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:47:20,122 INFO L87 Difference]: Start difference. First operand 540 states and 779 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:20,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:20,517 INFO L93 Difference]: Finished difference Result 2244 states and 3247 transitions. [2021-11-25 18:47:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:47:20,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-25 18:47:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:20,532 INFO L225 Difference]: With dead ends: 2244 [2021-11-25 18:47:20,532 INFO L226 Difference]: Without dead ends: 1730 [2021-11-25 18:47:20,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:47:20,542 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 303 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:20,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 395 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:47:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-11-25 18:47:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1724. [2021-11-25 18:47:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 1.441091120139292) internal successors, (2483), 1723 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2483 transitions. [2021-11-25 18:47:20,776 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2483 transitions. Word has length 49 [2021-11-25 18:47:20,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:20,780 INFO L470 AbstractCegarLoop]: Abstraction has 1724 states and 2483 transitions. [2021-11-25 18:47:20,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2483 transitions. [2021-11-25 18:47:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 18:47:20,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:20,793 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:47:20,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:47:20,795 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:20,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:20,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1105029325, now seen corresponding path program 1 times [2021-11-25 18:47:20,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:20,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15834778] [2021-11-25 18:47:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:20,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:47:21,092 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:21,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15834778] [2021-11-25 18:47:21,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15834778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:21,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:47:21,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 18:47:21,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487408752] [2021-11-25 18:47:21,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:21,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:47:21,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:21,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:47:21,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:47:21,096 INFO L87 Difference]: Start difference. First operand 1724 states and 2483 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:21,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:21,970 INFO L93 Difference]: Finished difference Result 4370 states and 6402 transitions. [2021-11-25 18:47:21,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:47:21,971 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-25 18:47:21,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:22,006 INFO L225 Difference]: With dead ends: 4370 [2021-11-25 18:47:22,007 INFO L226 Difference]: Without dead ends: 4368 [2021-11-25 18:47:22,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:47:22,016 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 938 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:22,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 1140 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:47:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4368 states. [2021-11-25 18:47:22,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4368 to 1973. [2021-11-25 18:47:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 1.4447261663286004) internal successors, (2849), 1972 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 2849 transitions. [2021-11-25 18:47:22,360 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 2849 transitions. Word has length 51 [2021-11-25 18:47:22,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:22,360 INFO L470 AbstractCegarLoop]: Abstraction has 1973 states and 2849 transitions. [2021-11-25 18:47:22,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:47:22,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 2849 transitions. [2021-11-25 18:47:22,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 18:47:22,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:22,363 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:47:22,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:47:22,364 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:22,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1961993484, now seen corresponding path program 1 times [2021-11-25 18:47:22,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:22,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950486944] [2021-11-25 18:47:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:22,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:47:23,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:23,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950486944] [2021-11-25 18:47:23,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950486944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:47:23,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375973380] [2021-11-25 18:47:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:23,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:23,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:47:23,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:47:23,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:47:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:24,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-25 18:47:24,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:47:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:47:27,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:47:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:47:40,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375973380] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:47:40,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1934549815] [2021-11-25 18:47:40,223 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2021-11-25 18:47:40,224 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:47:40,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:47:40,237 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:47:40,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:47:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:47:40,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:47:40,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:47:40,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:47:40,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:47:40,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:47:40,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-25 18:47:40,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:47:40,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:47:40,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:47:40,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-25 18:49:42,157 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:50:22,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21718#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~send3~0 127) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (<= ~__return_19080~0 1) (= ~p4~0 0) (<= ~st3~0 0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 ~mode4~0) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 ~send4~0) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~__return_19215~0) (<= ~send1~0 127) (<= ~st1~0 0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= (+ ~p4_old~0 1) 0) (<= ~__return_19215~0 1) (<= 0 ~st2~0) (<= ~mode3~0 1) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= (+ ~p2_new~0 1) 0) (<= ~st4~0 0) (<= 1 ~__return_19080~0) (<= 0 ~id4~0) (<= 0 (+ ~p4_new~0 1)) (<= (+ ~p4_new~0 1) 0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (= ~p3~0 0) (<= (+ ~p2_old~0 1) 0) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 ~send3~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (= ~__return_main~0 0) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2021-11-25 18:50:22,167 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:50:22,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:50:22,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 51 [2021-11-25 18:50:22,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039986608] [2021-11-25 18:50:22,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:50:22,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-25 18:50:22,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:50:22,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-25 18:50:22,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1314, Invalid=8586, Unknown=0, NotChecked=0, Total=9900 [2021-11-25 18:50:22,176 INFO L87 Difference]: Start difference. First operand 1973 states and 2849 transitions. Second operand has 51 states, 51 states have (on average 3.5294117647058822) internal successors, (180), 51 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:42,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:42,340 INFO L93 Difference]: Finished difference Result 57331 states and 83150 transitions. [2021-11-25 18:53:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 510 states. [2021-11-25 18:53:42,341 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.5294117647058822) internal successors, (180), 51 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-25 18:53:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:42,603 INFO L225 Difference]: With dead ends: 57331 [2021-11-25 18:53:42,603 INFO L226 Difference]: Without dead ends: 55392 [2021-11-25 18:53:42,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 602 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163745 ImplicationChecksByTransitivity, 206.8s TimeCoverageRelationStatistics Valid=60953, Invalid=303259, Unknown=0, NotChecked=0, Total=364212 [2021-11-25 18:53:42,688 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 14728 mSDsluCounter, 10093 mSDsCounter, 0 mSdLazyCounter, 16228 mSolverCounterSat, 1141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14728 SdHoareTripleChecker+Valid, 10498 SdHoareTripleChecker+Invalid, 17369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1141 IncrementalHoareTripleChecker+Valid, 16228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:42,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14728 Valid, 10498 Invalid, 17369 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1141 Valid, 16228 Invalid, 0 Unknown, 0 Unchecked, 21.5s Time] [2021-11-25 18:53:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55392 states. [2021-11-25 18:53:47,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55392 to 17345. [2021-11-25 18:53:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17345 states, 17344 states have (on average 1.3880880996309963) internal successors, (24075), 17344 states have internal predecessors, (24075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:47,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17345 states to 17345 states and 24075 transitions. [2021-11-25 18:53:47,746 INFO L78 Accepts]: Start accepts. Automaton has 17345 states and 24075 transitions. Word has length 61 [2021-11-25 18:53:47,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:47,746 INFO L470 AbstractCegarLoop]: Abstraction has 17345 states and 24075 transitions. [2021-11-25 18:53:47,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.5294117647058822) internal successors, (180), 51 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:47,747 INFO L276 IsEmpty]: Start isEmpty. Operand 17345 states and 24075 transitions. [2021-11-25 18:53:47,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 18:53:47,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:47,750 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:53:47,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:47,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:47,965 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:47,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:47,966 INFO L85 PathProgramCache]: Analyzing trace with hash -431881859, now seen corresponding path program 1 times [2021-11-25 18:53:47,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:47,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806553282] [2021-11-25 18:53:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:47,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:53:48,060 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:48,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806553282] [2021-11-25 18:53:48,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806553282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:48,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:48,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:53:48,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214649238] [2021-11-25 18:53:48,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:48,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:53:48,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:48,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:53:48,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:53:48,064 INFO L87 Difference]: Start difference. First operand 17345 states and 24075 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:53,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:53,075 INFO L93 Difference]: Finished difference Result 41591 states and 58166 transitions. [2021-11-25 18:53:53,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:53:53,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-25 18:53:53,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:53,129 INFO L225 Difference]: With dead ends: 41591 [2021-11-25 18:53:53,129 INFO L226 Difference]: Without dead ends: 24329 [2021-11-25 18:53:53,155 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:53:53,156 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 427 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:53,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 118 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:53:53,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24329 states. [2021-11-25 18:53:58,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24329 to 24327. [2021-11-25 18:53:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24327 states, 24326 states have (on average 1.3894187289320068) internal successors, (33799), 24326 states have internal predecessors, (33799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24327 states to 24327 states and 33799 transitions. [2021-11-25 18:53:58,429 INFO L78 Accepts]: Start accepts. Automaton has 24327 states and 33799 transitions. Word has length 61 [2021-11-25 18:53:58,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:58,429 INFO L470 AbstractCegarLoop]: Abstraction has 24327 states and 33799 transitions. [2021-11-25 18:53:58,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 24327 states and 33799 transitions. [2021-11-25 18:53:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 18:53:58,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:58,432 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:53:58,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:53:58,432 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:58,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:58,433 INFO L85 PathProgramCache]: Analyzing trace with hash -296120648, now seen corresponding path program 1 times [2021-11-25 18:53:58,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:58,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758938746] [2021-11-25 18:53:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:58,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:58,896 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:58,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758938746] [2021-11-25 18:53:58,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758938746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:58,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325928742] [2021-11-25 18:53:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:58,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:58,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:58,898 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:58,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad5c2d-e8ef-4b7d-ab1a-71f58c8f4c83/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:53:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:58,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-25 18:53:59,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:54:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:54:00,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:54:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:54:10,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325928742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:54:10,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752198289] [2021-11-25 18:54:10,306 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2021-11-25 18:54:10,306 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:54:10,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:54:10,307 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:54:10,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:54:10,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:54:10,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:54:10,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:54:10,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-25 18:54:10,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-25 18:54:53,289 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:55:14,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '250406#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (<= ~__return_19080~0 1) (= ~p4~0 0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 ~mode4~0) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 ~send4~0) (<= 0 (+ ~p1_old~0 1)) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~__return_19215~0) (<= |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1| 127) (<= ~send1~0 127) (<= ~st1~0 0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= 0 ~st1~0) (<= (+ ~p4_old~0 1) 0) (<= ~__return_19215~0 1) (<= 0 ~st2~0) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= ~send2~0 127) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~st2~0 0) (<= (+ ~p2_new~0 1) 0) (<= ~st4~0 0) (<= 0 |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1|) (<= 1 ~__return_19080~0) (<= 0 ~id4~0) (<= 0 (+ ~p4_new~0 1)) (<= (+ ~p4_new~0 1) 0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= (+ ~p1_old~0 1) 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2021-11-25 18:55:14,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:55:14,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:55:14,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2021-11-25 18:55:14,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711189786] [2021-11-25 18:55:14,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:55:14,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-25 18:55:14,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:14,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-25 18:55:14,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1156, Invalid=7400, Unknown=0, NotChecked=0, Total=8556 [2021-11-25 18:55:14,995 INFO L87 Difference]: Start difference. First operand 24327 states and 33799 transitions. Second operand has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 44 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:38,742 INFO L93 Difference]: Finished difference Result 192630 states and 271607 transitions. [2021-11-25 18:57:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 390 states. [2021-11-25 18:57:38,742 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 44 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-25 18:57:38,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:39,382 INFO L225 Difference]: With dead ends: 192630 [2021-11-25 18:57:39,383 INFO L226 Difference]: Without dead ends: 168337 [2021-11-25 18:57:39,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 473 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103988 ImplicationChecksByTransitivity, 115.6s TimeCoverageRelationStatistics Valid=32037, Invalid=193113, Unknown=0, NotChecked=0, Total=225150 [2021-11-25 18:57:39,550 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 12247 mSDsluCounter, 8937 mSDsCounter, 0 mSdLazyCounter, 11211 mSolverCounterSat, 912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12247 SdHoareTripleChecker+Valid, 9284 SdHoareTripleChecker+Invalid, 12123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 11211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:39,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12247 Valid, 9284 Invalid, 12123 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [912 Valid, 11211 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2021-11-25 18:57:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168337 states.