./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF --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 851dc7d49dcc9fde277beeb190c3ab252014728a3bd4281f423bffd927fb4430 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:37:47,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:37:47,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:37:47,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:37:47,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:37:47,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:37:47,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:37:47,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:37:47,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:37:47,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:37:47,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:37:47,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:37:47,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:37:47,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:37:47,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:37:47,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:37:47,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:37:47,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:37:47,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:37:47,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:37:47,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:37:47,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:37:47,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:37:47,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:37:47,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:37:47,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:37:47,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:37:47,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:37:47,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:37:47,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:37:47,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:37:47,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:37:47,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:37:47,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:37:47,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:37:47,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:37:47,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:37:47,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:37:47,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:37:47,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:37:47,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:37:47,368 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:37:47,422 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:37:47,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:37:47,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:37:47,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:37:47,425 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:37:47,426 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:37:47,426 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:37:47,426 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:37:47,426 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:37:47,427 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:37:47,435 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:37:47,436 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:37:47,436 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:37:47,436 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:37:47,437 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:37:47,437 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:37:47,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:37:47,438 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:37:47,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:37:47,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:37:47,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:37:47,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:37:47,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:37:47,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:37:47,440 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:37:47,440 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:37:47,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:37:47,440 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:37:47,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:37:47,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:37:47,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:37:47,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:37:47,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:37:47,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:37:47,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:37:47,444 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:37:47,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:37:47,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:37:47,445 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:37:47,445 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:37:47,445 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_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 851dc7d49dcc9fde277beeb190c3ab252014728a3bd4281f423bffd927fb4430 [2021-11-12 22:37:47,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:37:47,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:37:47,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:37:47,856 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:37:47,857 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:37:47,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 22:37:47,970 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF/data/c0ce06ef2/5c8dc5ce4d3f4cdbafb5dca503e82443/FLAG9d51b53df [2021-11-12 22:37:48,762 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:37:48,763 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 22:37:48,789 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF/data/c0ce06ef2/5c8dc5ce4d3f4cdbafb5dca503e82443/FLAG9d51b53df [2021-11-12 22:37:48,810 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF/data/c0ce06ef2/5c8dc5ce4d3f4cdbafb5dca503e82443 [2021-11-12 22:37:48,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:37:48,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:37:48,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:37:48,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:37:48,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:37:48,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:37:48" (1/1) ... [2021-11-12 22:37:48,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc4dc48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:37:48, skipping insertion in model container [2021-11-12 22:37:48,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:37:48" (1/1) ... [2021-11-12 22:37:48,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:37:48,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:37:49,386 WARN L228 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_4930b41d-812a-4a30-a1ff-0432a5202477/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2021-11-12 22:37:49,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:37:49,507 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:37:49,614 WARN L228 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_4930b41d-812a-4a30-a1ff-0432a5202477/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2021-11-12 22:37:49,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:37:49,785 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:37:49,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:37:49 WrapperNode [2021-11-12 22:37:49,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:37:49,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:37:49,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:37:49,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:37:49,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:37:49" (1/1) ... [2021-11-12 22:37:49,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:37:49" (1/1) ... [2021-11-12 22:37:49,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:37:49,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:37:49,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:37:49,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:37:49,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:37:49" (1/1) ... [2021-11-12 22:37:49,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:37:49" (1/1) ... [2021-11-12 22:37:49,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:37:49" (1/1) ... [2021-11-12 22:37:49,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:37:49" (1/1) ... [2021-11-12 22:37:49,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:37:49" (1/1) ... [2021-11-12 22:37:49,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:37:49" (1/1) ... [2021-11-12 22:37:49,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:37:49" (1/1) ... [2021-11-12 22:37:49,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:37:49,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:37:49,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:37:49,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:37:49,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:37:49" (1/1) ... [2021-11-12 22:37:49,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:37:50,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:37:50,027 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:37:50,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930b41d-812a-4a30-a1ff-0432a5202477/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:37:50,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:37:50,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:37:50,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:37:50,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:37:51,688 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:37:51,688 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:37:51,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:37:51 BoogieIcfgContainer [2021-11-12 22:37:51,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:37:51,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:37:51,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:37:51,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:37:51,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:37:48" (1/3) ... [2021-11-12 22:37:51,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a9fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:37:51, skipping insertion in model container [2021-11-12 22:37:51,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:37:49" (2/3) ... [2021-11-12 22:37:51,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a9fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:37:51, skipping insertion in model container [2021-11-12 22:37:51,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:37:51" (3/3) ... [2021-11-12 22:37:51,709 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 22:37:51,716 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:37:51,716 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:37:51,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:37:51,797 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 [2021-11-12 22:37:51,797 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:37:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 1.7098445595854923) internal successors, (330), 194 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:37:51,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:51,835 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:51,835 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:51,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1772722671, now seen corresponding path program 1 times [2021-11-12 22:37:51,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:51,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252471245] [2021-11-12 22:37:51,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:51,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:52,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:52,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252471245] [2021-11-12 22:37:52,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252471245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:52,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:52,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-12 22:37:52,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604243838] [2021-11-12 22:37:52,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:52,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:37:52,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:52,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:37:52,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:37:52,708 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 1.7098445595854923) internal successors, (330), 194 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:53,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:53,362 INFO L93 Difference]: Finished difference Result 770 states and 1237 transitions. [2021-11-12 22:37:53,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:37:53,366 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-12 22:37:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:53,399 INFO L225 Difference]: With dead ends: 770 [2021-11-12 22:37:53,399 INFO L226 Difference]: Without dead ends: 659 [2021-11-12 22:37:53,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:37:53,408 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 1852 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 373.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1852 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.66ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 437.47ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:53,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1852 Valid, 1386 Invalid, 240 Unknown, 0 Unchecked, 22.66ms Time], IncrementalHoareTripleChecker [30 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 437.47ms Time] [2021-11-12 22:37:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-11-12 22:37:53,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 649. [2021-11-12 22:37:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.4243827160493827) internal successors, (923), 648 states have internal predecessors, (923), 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) [2021-11-12 22:37:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 923 transitions. [2021-11-12 22:37:53,574 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 923 transitions. Word has length 81 [2021-11-12 22:37:53,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:53,575 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 923 transitions. [2021-11-12 22:37:53,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 923 transitions. [2021-11-12 22:37:53,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 22:37:53,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:53,591 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:53,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:37:53,592 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:53,596 INFO L85 PathProgramCache]: Analyzing trace with hash 230661414, now seen corresponding path program 1 times [2021-11-12 22:37:53,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:53,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022653004] [2021-11-12 22:37:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:53,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:53,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:53,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022653004] [2021-11-12 22:37:53,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022653004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:53,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:53,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:37:53,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031575394] [2021-11-12 22:37:53,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:53,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:37:53,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:53,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:37:53,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:37:53,860 INFO L87 Difference]: Start difference. First operand 649 states and 923 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:54,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:54,340 INFO L93 Difference]: Finished difference Result 1580 states and 2302 transitions. [2021-11-12 22:37:54,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:37:54,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-12 22:37:54,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:54,352 INFO L225 Difference]: With dead ends: 1580 [2021-11-12 22:37:54,352 INFO L226 Difference]: Without dead ends: 981 [2021-11-12 22:37:54,359 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 [2021-11-12 22:37:54,361 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 709 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 272.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.73ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 336.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:54,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 263 Invalid, 256 Unknown, 0 Unchecked, 4.73ms Time], IncrementalHoareTripleChecker [6 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 336.38ms Time] [2021-11-12 22:37:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-11-12 22:37:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 979. [2021-11-12 22:37:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 1.4519427402862985) internal successors, (1420), 978 states have internal predecessors, (1420), 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) [2021-11-12 22:37:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1420 transitions. [2021-11-12 22:37:54,515 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1420 transitions. Word has length 82 [2021-11-12 22:37:54,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:54,518 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 1420 transitions. [2021-11-12 22:37:54,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:54,520 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1420 transitions. [2021-11-12 22:37:54,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 22:37:54,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:54,526 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:54,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:37:54,527 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash 360098538, now seen corresponding path program 1 times [2021-11-12 22:37:54,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:54,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905833610] [2021-11-12 22:37:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:54,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:54,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:54,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905833610] [2021-11-12 22:37:54,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905833610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:54,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:54,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:37:54,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141204998] [2021-11-12 22:37:54,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:54,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:37:54,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:54,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:37:54,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:37:54,714 INFO L87 Difference]: Start difference. First operand 979 states and 1420 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:55,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:55,284 INFO L93 Difference]: Finished difference Result 2518 states and 3729 transitions. [2021-11-12 22:37:55,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:37:55,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-12 22:37:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:55,300 INFO L225 Difference]: With dead ends: 2518 [2021-11-12 22:37:55,300 INFO L226 Difference]: Without dead ends: 1695 [2021-11-12 22:37:55,302 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 [2021-11-12 22:37:55,312 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 659 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 257.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.02ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 316.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:55,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 295 Invalid, 250 Unknown, 0 Unchecked, 5.02ms Time], IncrementalHoareTripleChecker [6 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 316.29ms Time] [2021-11-12 22:37:55,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2021-11-12 22:37:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1693. [2021-11-12 22:37:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 1.4734042553191489) internal successors, (2493), 1692 states have internal predecessors, (2493), 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) [2021-11-12 22:37:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 2493 transitions. [2021-11-12 22:37:55,543 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 2493 transitions. Word has length 82 [2021-11-12 22:37:55,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:55,544 INFO L470 AbstractCegarLoop]: Abstraction has 1693 states and 2493 transitions. [2021-11-12 22:37:55,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:55,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 2493 transitions. [2021-11-12 22:37:55,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 22:37:55,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:55,549 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:55,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:37:55,550 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:55,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:55,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1311537989, now seen corresponding path program 1 times [2021-11-12 22:37:55,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:55,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682861810] [2021-11-12 22:37:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:55,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:55,753 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:55,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682861810] [2021-11-12 22:37:55,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682861810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:55,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:55,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:37:55,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225775173] [2021-11-12 22:37:55,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:55,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:37:55,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:55,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:37:55,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:37:55,757 INFO L87 Difference]: Start difference. First operand 1693 states and 2493 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:56,408 INFO L93 Difference]: Finished difference Result 4619 states and 6903 transitions. [2021-11-12 22:37:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:37:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-12 22:37:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:56,436 INFO L225 Difference]: With dead ends: 4619 [2021-11-12 22:37:56,436 INFO L226 Difference]: Without dead ends: 3123 [2021-11-12 22:37:56,440 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 [2021-11-12 22:37:56,442 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 677 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 197.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.35ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 240.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:56,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 296 Invalid, 236 Unknown, 0 Unchecked, 4.35ms Time], IncrementalHoareTripleChecker [6 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 240.41ms Time] [2021-11-12 22:37:56,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-11-12 22:37:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 3121. [2021-11-12 22:37:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3121 states, 3120 states have (on average 1.485897435897436) internal successors, (4636), 3120 states have internal predecessors, (4636), 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) [2021-11-12 22:37:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 4636 transitions. [2021-11-12 22:37:56,882 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 4636 transitions. Word has length 82 [2021-11-12 22:37:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:56,883 INFO L470 AbstractCegarLoop]: Abstraction has 3121 states and 4636 transitions. [2021-11-12 22:37:56,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 4636 transitions. [2021-11-12 22:37:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 22:37:56,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:56,892 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:56,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 22:37:56,893 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:56,893 INFO L85 PathProgramCache]: Analyzing trace with hash -691394855, now seen corresponding path program 1 times [2021-11-12 22:37:56,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:56,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011990495] [2021-11-12 22:37:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:56,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:57,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:57,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011990495] [2021-11-12 22:37:57,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011990495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:57,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:57,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:37:57,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304430941] [2021-11-12 22:37:57,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:57,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:37:57,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:57,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:37:57,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:37:57,063 INFO L87 Difference]: Start difference. First operand 3121 states and 4636 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:58,073 INFO L93 Difference]: Finished difference Result 8981 states and 13442 transitions. [2021-11-12 22:37:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:37:58,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-12 22:37:58,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:58,124 INFO L225 Difference]: With dead ends: 8981 [2021-11-12 22:37:58,124 INFO L226 Difference]: Without dead ends: 5979 [2021-11-12 22:37:58,131 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 [2021-11-12 22:37:58,135 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 658 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 231.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.55ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 283.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:58,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 287 Invalid, 247 Unknown, 0 Unchecked, 4.55ms Time], IncrementalHoareTripleChecker [6 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 283.58ms Time] [2021-11-12 22:37:58,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5979 states. [2021-11-12 22:37:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5979 to 5977. [2021-11-12 22:37:58,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5977 states, 5976 states have (on average 1.4877844712182062) internal successors, (8891), 5976 states have internal predecessors, (8891), 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) [2021-11-12 22:37:58,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5977 states to 5977 states and 8891 transitions. [2021-11-12 22:37:58,878 INFO L78 Accepts]: Start accepts. Automaton has 5977 states and 8891 transitions. Word has length 82 [2021-11-12 22:37:58,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:58,884 INFO L470 AbstractCegarLoop]: Abstraction has 5977 states and 8891 transitions. [2021-11-12 22:37:58,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:37:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 5977 states and 8891 transitions. [2021-11-12 22:37:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 22:37:58,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:58,887 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:58,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 22:37:58,887 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:58,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:58,889 INFO L85 PathProgramCache]: Analyzing trace with hash -911705976, now seen corresponding path program 1 times [2021-11-12 22:37:58,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:37:58,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313104573] [2021-11-12 22:37:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:58,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:37:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:37:58,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:37:58,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313104573] [2021-11-12 22:37:58,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313104573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:58,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:58,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:37:58,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033929415] [2021-11-12 22:37:59,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:59,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:37:59,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:37:59,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:37:59,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:37:59,003 INFO L87 Difference]: Start difference. First operand 5977 states and 8891 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:38:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:00,642 INFO L93 Difference]: Finished difference Result 17579 states and 26255 transitions. [2021-11-12 22:38:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:38:00,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-12 22:38:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:00,735 INFO L225 Difference]: With dead ends: 17579 [2021-11-12 22:38:00,736 INFO L226 Difference]: Without dead ends: 11691 [2021-11-12 22:38:00,748 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 [2021-11-12 22:38:00,749 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 663 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 287.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.39ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 334.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:00,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 279 Invalid, 246 Unknown, 0 Unchecked, 4.39ms Time], IncrementalHoareTripleChecker [6 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 334.86ms Time] [2021-11-12 22:38:00,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11691 states. [2021-11-12 22:38:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11691 to 11689. [2021-11-12 22:38:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11689 states, 11688 states have (on average 1.4828028747433264) internal successors, (17331), 11688 states have internal predecessors, (17331), 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) [2021-11-12 22:38:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11689 states to 11689 states and 17331 transitions. [2021-11-12 22:38:02,221 INFO L78 Accepts]: Start accepts. Automaton has 11689 states and 17331 transitions. Word has length 82 [2021-11-12 22:38:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:02,222 INFO L470 AbstractCegarLoop]: Abstraction has 11689 states and 17331 transitions. [2021-11-12 22:38:02,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:38:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 11689 states and 17331 transitions. [2021-11-12 22:38:02,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 22:38:02,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:02,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:38:02,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 22:38:02,225 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:02,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:02,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1677467639, now seen corresponding path program 1 times [2021-11-12 22:38:02,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:38:02,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436030599] [2021-11-12 22:38:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:02,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:38:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:38:02,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:38:02,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436030599] [2021-11-12 22:38:02,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436030599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:02,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:02,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:38:02,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457413329] [2021-11-12 22:38:02,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:02,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:38:02,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:38:02,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:38:02,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:38:02,326 INFO L87 Difference]: Start difference. First operand 11689 states and 17331 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:38:04,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:04,589 INFO L93 Difference]: Finished difference Result 34738 states and 51612 transitions. [2021-11-12 22:38:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:38:04,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-12 22:38:04,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:04,677 INFO L225 Difference]: With dead ends: 34738 [2021-11-12 22:38:04,677 INFO L226 Difference]: Without dead ends: 23115 [2021-11-12 22:38:04,702 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 [2021-11-12 22:38:04,704 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 668 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 219.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.06ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 268.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:04,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 271 Invalid, 245 Unknown, 0 Unchecked, 4.06ms Time], IncrementalHoareTripleChecker [6 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 268.46ms Time] [2021-11-12 22:38:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23115 states. [2021-11-12 22:38:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23115 to 23113. [2021-11-12 22:38:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23113 states, 23112 states have (on average 1.4731741086881274) internal successors, (34048), 23112 states have internal predecessors, (34048), 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) [2021-11-12 22:38:06,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23113 states to 23113 states and 34048 transitions. [2021-11-12 22:38:06,866 INFO L78 Accepts]: Start accepts. Automaton has 23113 states and 34048 transitions. Word has length 82 [2021-11-12 22:38:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:06,867 INFO L470 AbstractCegarLoop]: Abstraction has 23113 states and 34048 transitions. [2021-11-12 22:38:06,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:38:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 23113 states and 34048 transitions. [2021-11-12 22:38:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 22:38:06,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:06,870 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:38:06,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 22:38:06,871 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:06,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:06,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1203805347, now seen corresponding path program 1 times [2021-11-12 22:38:06,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:38:06,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432812237] [2021-11-12 22:38:06,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:06,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:38:06,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:38:09,179 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:38:09,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432812237] [2021-11-12 22:38:09,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432812237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:09,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:09,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-12 22:38:09,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188837031] [2021-11-12 22:38:09,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:09,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 22:38:09,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:38:09,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 22:38:09,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:38:09,182 INFO L87 Difference]: Start difference. First operand 23113 states and 34048 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:38:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:19,438 INFO L93 Difference]: Finished difference Result 60984 states and 89704 transitions. [2021-11-12 22:38:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 22:38:19,439 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-12 22:38:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:19,660 INFO L225 Difference]: With dead ends: 60984 [2021-11-12 22:38:19,660 INFO L226 Difference]: Without dead ends: 60982 [2021-11-12 22:38:19,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-11-12 22:38:19,678 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 1976 mSDsluCounter, 2369 mSDsCounter, 0 mSdLazyCounter, 2833 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2449.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1976 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.96ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2943.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:19,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1976 Valid, 2594 Invalid, 2885 Unknown, 0 Unchecked, 34.96ms Time], IncrementalHoareTripleChecker [52 Valid, 2833 Invalid, 0 Unknown, 0 Unchecked, 2943.58ms Time] [2021-11-12 22:38:19,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60982 states. [2021-11-12 22:38:24,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60982 to 45989. [2021-11-12 22:38:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45989 states, 45988 states have (on average 1.4672740714969121) internal successors, (67477), 45988 states have internal predecessors, (67477), 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) [2021-11-12 22:38:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45989 states to 45989 states and 67477 transitions. [2021-11-12 22:38:24,722 INFO L78 Accepts]: Start accepts. Automaton has 45989 states and 67477 transitions. Word has length 83 [2021-11-12 22:38:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:24,722 INFO L470 AbstractCegarLoop]: Abstraction has 45989 states and 67477 transitions. [2021-11-12 22:38:24,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:38:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 45989 states and 67477 transitions. [2021-11-12 22:38:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 22:38:24,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:24,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:38:24,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 22:38:24,726 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash -249302051, now seen corresponding path program 1 times [2021-11-12 22:38:24,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:38:24,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390411109] [2021-11-12 22:38:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:24,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:38:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:38:25,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:38:25,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390411109] [2021-11-12 22:38:25,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390411109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:25,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:25,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-12 22:38:25,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012418294] [2021-11-12 22:38:25,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:25,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:38:25,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:38:25,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:38:25,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:38:25,856 INFO L87 Difference]: Start difference. First operand 45989 states and 67477 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:38:32,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:32,602 INFO L93 Difference]: Finished difference Result 58835 states and 86115 transitions. [2021-11-12 22:38:32,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:38:32,603 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-12 22:38:32,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:32,760 INFO L225 Difference]: With dead ends: 58835 [2021-11-12 22:38:32,760 INFO L226 Difference]: Without dead ends: 54033 [2021-11-12 22:38:32,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:38:32,788 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 1174 mSDsluCounter, 3548 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1308.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 3900 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.91ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1536.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:32,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 3900 Invalid, 1598 Unknown, 0 Unchecked, 36.91ms Time], IncrementalHoareTripleChecker [25 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 1536.65ms Time] [2021-11-12 22:38:32,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54033 states. [2021-11-12 22:38:38,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54033 to 50437. [2021-11-12 22:38:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50437 states, 50436 states have (on average 1.4652629074470616) internal successors, (73902), 50436 states have internal predecessors, (73902), 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) [2021-11-12 22:38:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50437 states to 50437 states and 73902 transitions. [2021-11-12 22:38:38,311 INFO L78 Accepts]: Start accepts. Automaton has 50437 states and 73902 transitions. Word has length 83 [2021-11-12 22:38:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:38,312 INFO L470 AbstractCegarLoop]: Abstraction has 50437 states and 73902 transitions. [2021-11-12 22:38:38,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:38:38,313 INFO L276 IsEmpty]: Start isEmpty. Operand 50437 states and 73902 transitions. [2021-11-12 22:38:38,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 22:38:38,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:38,315 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:38:38,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 22:38:38,316 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:38,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:38,316 INFO L85 PathProgramCache]: Analyzing trace with hash 941319165, now seen corresponding path program 1 times [2021-11-12 22:38:38,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:38:38,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416094710] [2021-11-12 22:38:38,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:38,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:38:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:38:39,367 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:38:39,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416094710] [2021-11-12 22:38:39,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416094710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:39,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:39,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-12 22:38:39,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916279187] [2021-11-12 22:38:39,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:39,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:38:39,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:38:39,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:38:39,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:38:39,371 INFO L87 Difference]: Start difference. First operand 50437 states and 73902 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:38:45,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:45,775 INFO L93 Difference]: Finished difference Result 58330 states and 85272 transitions. [2021-11-12 22:38:45,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:38:45,776 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-12 22:38:45,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:45,883 INFO L225 Difference]: With dead ends: 58330 [2021-11-12 22:38:45,884 INFO L226 Difference]: Without dead ends: 58328 [2021-11-12 22:38:45,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:38:45,898 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 1236 mSDsluCounter, 2519 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 733.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 2881 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.09ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1074.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:45,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 2881 Invalid, 993 Unknown, 0 Unchecked, 14.09ms Time], IncrementalHoareTripleChecker [32 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 1074.96ms Time] [2021-11-12 22:38:45,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58328 states. [2021-11-12 22:38:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58328 to 50456. [2021-11-12 22:38:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50456 states, 50455 states have (on average 1.4651273411951244) internal successors, (73923), 50455 states have internal predecessors, (73923), 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) [2021-11-12 22:38:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50456 states to 50456 states and 73923 transitions. [2021-11-12 22:38:51,197 INFO L78 Accepts]: Start accepts. Automaton has 50456 states and 73923 transitions. Word has length 83 [2021-11-12 22:38:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:51,199 INFO L470 AbstractCegarLoop]: Abstraction has 50456 states and 73923 transitions. [2021-11-12 22:38:51,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:38:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 50456 states and 73923 transitions. [2021-11-12 22:38:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 22:38:51,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:51,202 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:38:51,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 22:38:51,203 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:51,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:51,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1967274941, now seen corresponding path program 1 times [2021-11-12 22:38:51,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:38:51,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836984070] [2021-11-12 22:38:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:51,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:38:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:38:52,800 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:38:52,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836984070] [2021-11-12 22:38:52,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836984070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:52,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:52,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-12 22:38:52,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207921897] [2021-11-12 22:38:52,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:52,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 22:38:52,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:38:52,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 22:38:52,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:38:52,804 INFO L87 Difference]: Start difference. First operand 50456 states and 73923 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:39:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:02,791 INFO L93 Difference]: Finished difference Result 69195 states and 101228 transitions. [2021-11-12 22:39:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 22:39:02,806 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-12 22:39:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:02,970 INFO L225 Difference]: With dead ends: 69195 [2021-11-12 22:39:02,971 INFO L226 Difference]: Without dead ends: 69193 [2021-11-12 22:39:02,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2021-11-12 22:39:02,989 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 1557 mSDsluCounter, 2478 mSDsCounter, 0 mSdLazyCounter, 3191 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2061.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 2743 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.91ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2431.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:02,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1557 Valid, 2743 Invalid, 3216 Unknown, 0 Unchecked, 18.91ms Time], IncrementalHoareTripleChecker [25 Valid, 3191 Invalid, 0 Unknown, 0 Unchecked, 2431.31ms Time] [2021-11-12 22:39:03,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69193 states.