./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI --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 62866bd9334bc9e66fef5c8a3ab686f8cd6aa0c9 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:26:42,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:26:42,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:26:42,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:26:42,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:26:42,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:26:42,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:26:42,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:26:42,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:26:42,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:26:42,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:26:42,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:26:42,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:26:42,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:26:42,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:26:42,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:26:42,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:26:42,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:26:42,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:26:42,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:26:42,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:26:42,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:26:42,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:26:42,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:26:42,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:26:42,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:26:42,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:26:42,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:26:42,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:26:42,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:26:42,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:26:42,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:26:42,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:26:42,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:26:42,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:26:42,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:26:42,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:26:42,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:26:42,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:26:42,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:26:42,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:26:42,514 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:26:42,538 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:26:42,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:26:42,539 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:26:42,539 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:26:42,540 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:26:42,540 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:26:42,540 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:26:42,540 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:26:42,541 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:26:42,541 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:26:42,541 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:26:42,541 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:26:42,542 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:26:42,542 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:26:42,542 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:26:42,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:26:42,543 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:26:42,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:26:42,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:26:42,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:26:42,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:26:42,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:26:42,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:26:42,544 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:26:42,545 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:26:42,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:26:42,545 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:26:42,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:26:42,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:26:42,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:26:42,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:42,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:26:42,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:26:42,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:26:42,547 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:26:42,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:26:42,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:26:42,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:26:42,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:26:42,548 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_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62866bd9334bc9e66fef5c8a3ab686f8cd6aa0c9 [2021-10-11 02:26:42,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:26:42,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:26:42,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:26:42,812 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:26:42,813 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:26:42,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/eca-rers2012/Problem01_label02.c [2021-10-11 02:26:42,871 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/data/1593b02a7/c0a2aa5836564b3cb5274fcbf49fbd92/FLAG4d0c8f293 [2021-10-11 02:26:43,462 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:43,463 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/sv-benchmarks/c/eca-rers2012/Problem01_label02.c [2021-10-11 02:26:43,480 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/data/1593b02a7/c0a2aa5836564b3cb5274fcbf49fbd92/FLAG4d0c8f293 [2021-10-11 02:26:43,715 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/data/1593b02a7/c0a2aa5836564b3cb5274fcbf49fbd92 [2021-10-11 02:26:43,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:43,720 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:43,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:43,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:43,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:43,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:43" (1/1) ... [2021-10-11 02:26:43,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df961bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:43, skipping insertion in model container [2021-10-11 02:26:43,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:43" (1/1) ... [2021-10-11 02:26:43,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:43,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:44,210 WARN L226 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_b00ad116-582e-44b6-9fc6-cdf48eef552e/sv-benchmarks/c/eca-rers2012/Problem01_label02.c[16747,16760] [2021-10-11 02:26:44,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:44,256 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:44,333 WARN L226 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_b00ad116-582e-44b6-9fc6-cdf48eef552e/sv-benchmarks/c/eca-rers2012/Problem01_label02.c[16747,16760] [2021-10-11 02:26:44,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:44,379 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:44,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:44 WrapperNode [2021-10-11 02:26:44,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:44,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:44,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:44,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:44,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:44" (1/1) ... [2021-10-11 02:26:44,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:44" (1/1) ... [2021-10-11 02:26:44,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:44,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:44,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:44,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:44,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:44" (1/1) ... [2021-10-11 02:26:44,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:44" (1/1) ... [2021-10-11 02:26:44,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:44" (1/1) ... [2021-10-11 02:26:44,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:44" (1/1) ... [2021-10-11 02:26:44,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:44" (1/1) ... [2021-10-11 02:26:44,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:44" (1/1) ... [2021-10-11 02:26:44,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:44" (1/1) ... [2021-10-11 02:26:44,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:44,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:44,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:44,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:44,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:44" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:44,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:26:44,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:44,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:44,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:47,095 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:47,095 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:26:47,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:47 BoogieIcfgContainer [2021-10-11 02:26:47,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:47,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:47,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:47,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:47,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:43" (1/3) ... [2021-10-11 02:26:47,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431d6211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:47, skipping insertion in model container [2021-10-11 02:26:47,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:44" (2/3) ... [2021-10-11 02:26:47,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431d6211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:47, skipping insertion in model container [2021-10-11 02:26:47,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:47" (3/3) ... [2021-10-11 02:26:47,119 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label02.c [2021-10-11 02:26:47,138 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:47,142 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:26:47,156 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:26:47,180 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:47,180 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:26:47,181 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:47,181 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:47,181 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:47,181 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:47,181 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:47,182 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:47,197 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2021-10-11 02:26:47,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-11 02:26:47,204 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:47,205 INFO L422 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] [2021-10-11 02:26:47,206 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:47,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1806914648, now seen corresponding path program 1 times [2021-10-11 02:26:47,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:47,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129642754] [2021-10-11 02:26:47,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:47,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129642754] [2021-10-11 02:26:47,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:47,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:47,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628650903] [2021-10-11 02:26:47,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:47,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:47,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:47,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:47,608 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2021-10-11 02:26:48,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:48,144 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-11 02:26:48,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:48,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2021-10-11 02:26:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:48,158 INFO L225 Difference]: With dead ends: 224 [2021-10-11 02:26:48,158 INFO L226 Difference]: Without dead ends: 145 [2021-10-11 02:26:48,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-11 02:26:48,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-11 02:26:48,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-10-11 02:26:48,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2021-10-11 02:26:48,210 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2021-10-11 02:26:48,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:48,211 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2021-10-11 02:26:48,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:48,211 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2021-10-11 02:26:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-11 02:26:48,215 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:48,215 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:48,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:26:48,216 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:48,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1034859141, now seen corresponding path program 1 times [2021-10-11 02:26:48,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:48,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663904485] [2021-10-11 02:26:48,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:48,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663904485] [2021-10-11 02:26:48,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:48,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:48,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010484152] [2021-10-11 02:26:48,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:48,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:48,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:48,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:48,295 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2021-10-11 02:26:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:48,734 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2021-10-11 02:26:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:48,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2021-10-11 02:26:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:48,745 INFO L225 Difference]: With dead ends: 431 [2021-10-11 02:26:48,745 INFO L226 Difference]: Without dead ends: 287 [2021-10-11 02:26:48,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:48,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-11 02:26:48,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-11 02:26:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2021-10-11 02:26:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2021-10-11 02:26:48,797 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2021-10-11 02:26:48,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:48,797 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2021-10-11 02:26:48,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:48,798 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2021-10-11 02:26:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-11 02:26:48,807 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:48,807 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:48,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:26:48,807 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:48,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:48,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1703779783, now seen corresponding path program 1 times [2021-10-11 02:26:48,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:48,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436455959] [2021-10-11 02:26:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 02:26:48,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436455959] [2021-10-11 02:26:48,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:48,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:48,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814235727] [2021-10-11 02:26:48,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:48,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:48,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:48,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:48,963 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand 3 states. [2021-10-11 02:26:49,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:49,363 INFO L93 Difference]: Finished difference Result 857 states and 1401 transitions. [2021-10-11 02:26:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:49,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2021-10-11 02:26:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:49,367 INFO L225 Difference]: With dead ends: 857 [2021-10-11 02:26:49,368 INFO L226 Difference]: Without dead ends: 571 [2021-10-11 02:26:49,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-10-11 02:26:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-10-11 02:26:49,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2021-10-11 02:26:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 884 transitions. [2021-10-11 02:26:49,392 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 884 transitions. Word has length 78 [2021-10-11 02:26:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:49,392 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 884 transitions. [2021-10-11 02:26:49,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 884 transitions. [2021-10-11 02:26:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-11 02:26:49,394 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:49,395 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:49,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:26:49,395 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:49,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:49,396 INFO L82 PathProgramCache]: Analyzing trace with hash 289047691, now seen corresponding path program 1 times [2021-10-11 02:26:49,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:49,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607832449] [2021-10-11 02:26:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-11 02:26:49,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607832449] [2021-10-11 02:26:49,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:49,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:49,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570424948] [2021-10-11 02:26:49,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:49,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:49,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:49,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:49,479 INFO L87 Difference]: Start difference. First operand 571 states and 884 transitions. Second operand 3 states. [2021-10-11 02:26:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:49,896 INFO L93 Difference]: Finished difference Result 1567 states and 2441 transitions. [2021-10-11 02:26:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:49,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2021-10-11 02:26:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:49,903 INFO L225 Difference]: With dead ends: 1567 [2021-10-11 02:26:49,904 INFO L226 Difference]: Without dead ends: 997 [2021-10-11 02:26:49,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:49,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-11 02:26:49,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 713. [2021-10-11 02:26:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2021-10-11 02:26:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1045 transitions. [2021-10-11 02:26:49,934 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1045 transitions. Word has length 91 [2021-10-11 02:26:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:49,935 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1045 transitions. [2021-10-11 02:26:49,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:49,935 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1045 transitions. [2021-10-11 02:26:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-11 02:26:49,941 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:49,941 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:49,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:26:49,942 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:49,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:49,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1324169875, now seen corresponding path program 1 times [2021-10-11 02:26:49,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:49,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529064627] [2021-10-11 02:26:49,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:50,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529064627] [2021-10-11 02:26:50,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:50,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:50,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834553579] [2021-10-11 02:26:50,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:50,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:50,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:50,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:50,069 INFO L87 Difference]: Start difference. First operand 713 states and 1045 transitions. Second operand 3 states. [2021-10-11 02:26:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:50,534 INFO L93 Difference]: Finished difference Result 2135 states and 3132 transitions. [2021-10-11 02:26:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:50,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2021-10-11 02:26:50,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:50,544 INFO L225 Difference]: With dead ends: 2135 [2021-10-11 02:26:50,544 INFO L226 Difference]: Without dead ends: 1423 [2021-10-11 02:26:50,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:50,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-10-11 02:26:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1281. [2021-10-11 02:26:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2021-10-11 02:26:50,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1796 transitions. [2021-10-11 02:26:50,581 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1796 transitions. Word has length 94 [2021-10-11 02:26:50,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:50,582 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1796 transitions. [2021-10-11 02:26:50,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:50,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1796 transitions. [2021-10-11 02:26:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-11 02:26:50,585 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:50,585 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:50,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:26:50,586 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:50,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:50,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1729121258, now seen corresponding path program 1 times [2021-10-11 02:26:50,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:50,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231797328] [2021-10-11 02:26:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:50,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231797328] [2021-10-11 02:26:50,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:50,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:50,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847376445] [2021-10-11 02:26:50,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:50,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:50,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:50,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:50,661 INFO L87 Difference]: Start difference. First operand 1281 states and 1796 transitions. Second operand 4 states. [2021-10-11 02:26:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:51,307 INFO L93 Difference]: Finished difference Result 2845 states and 3918 transitions. [2021-10-11 02:26:51,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:51,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2021-10-11 02:26:51,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:51,317 INFO L225 Difference]: With dead ends: 2845 [2021-10-11 02:26:51,318 INFO L226 Difference]: Without dead ends: 1636 [2021-10-11 02:26:51,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-10-11 02:26:51,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1423. [2021-10-11 02:26:51,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1423 states. [2021-10-11 02:26:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 1945 transitions. [2021-10-11 02:26:51,355 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 1945 transitions. Word has length 97 [2021-10-11 02:26:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:51,356 INFO L481 AbstractCegarLoop]: Abstraction has 1423 states and 1945 transitions. [2021-10-11 02:26:51,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:51,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 1945 transitions. [2021-10-11 02:26:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-11 02:26:51,359 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:51,359 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:51,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:26:51,360 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:51,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:51,360 INFO L82 PathProgramCache]: Analyzing trace with hash -720012663, now seen corresponding path program 1 times [2021-10-11 02:26:51,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:51,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384484235] [2021-10-11 02:26:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-11 02:26:51,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384484235] [2021-10-11 02:26:51,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:51,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:51,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280118115] [2021-10-11 02:26:51,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:51,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:51,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:51,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:51,412 INFO L87 Difference]: Start difference. First operand 1423 states and 1945 transitions. Second operand 3 states. [2021-10-11 02:26:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:51,876 INFO L93 Difference]: Finished difference Result 2916 states and 3960 transitions. [2021-10-11 02:26:51,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:51,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2021-10-11 02:26:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:51,885 INFO L225 Difference]: With dead ends: 2916 [2021-10-11 02:26:51,885 INFO L226 Difference]: Without dead ends: 1423 [2021-10-11 02:26:51,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:51,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-10-11 02:26:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1423. [2021-10-11 02:26:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1423 states. [2021-10-11 02:26:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 1726 transitions. [2021-10-11 02:26:51,929 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 1726 transitions. Word has length 98 [2021-10-11 02:26:51,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:51,929 INFO L481 AbstractCegarLoop]: Abstraction has 1423 states and 1726 transitions. [2021-10-11 02:26:51,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:51,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 1726 transitions. [2021-10-11 02:26:51,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-11 02:26:51,933 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:51,933 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:51,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:26:51,933 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:51,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:51,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1815696943, now seen corresponding path program 1 times [2021-10-11 02:26:51,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:51,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983465444] [2021-10-11 02:26:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-11 02:26:51,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983465444] [2021-10-11 02:26:51,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:51,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:51,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555197621] [2021-10-11 02:26:51,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:51,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:51,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:51,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:51,999 INFO L87 Difference]: Start difference. First operand 1423 states and 1726 transitions. Second operand 3 states. [2021-10-11 02:26:52,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:52,326 INFO L93 Difference]: Finished difference Result 2774 states and 3373 transitions. [2021-10-11 02:26:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:52,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2021-10-11 02:26:52,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:52,334 INFO L225 Difference]: With dead ends: 2774 [2021-10-11 02:26:52,334 INFO L226 Difference]: Without dead ends: 1423 [2021-10-11 02:26:52,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:52,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-10-11 02:26:52,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1423. [2021-10-11 02:26:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1423 states. [2021-10-11 02:26:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 1683 transitions. [2021-10-11 02:26:52,369 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 1683 transitions. Word has length 102 [2021-10-11 02:26:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:52,370 INFO L481 AbstractCegarLoop]: Abstraction has 1423 states and 1683 transitions. [2021-10-11 02:26:52,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 1683 transitions. [2021-10-11 02:26:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-11 02:26:52,373 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:52,374 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:52,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:26:52,374 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:52,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:52,375 INFO L82 PathProgramCache]: Analyzing trace with hash -785769931, now seen corresponding path program 1 times [2021-10-11 02:26:52,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:52,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405554010] [2021-10-11 02:26:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-11 02:26:52,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405554010] [2021-10-11 02:26:52,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:52,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:52,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572817719] [2021-10-11 02:26:52,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:52,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:52,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:52,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:52,480 INFO L87 Difference]: Start difference. First operand 1423 states and 1683 transitions. Second operand 3 states. [2021-10-11 02:26:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:52,830 INFO L93 Difference]: Finished difference Result 3200 states and 3823 transitions. [2021-10-11 02:26:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:52,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2021-10-11 02:26:52,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:52,844 INFO L225 Difference]: With dead ends: 3200 [2021-10-11 02:26:52,844 INFO L226 Difference]: Without dead ends: 1849 [2021-10-11 02:26:52,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-10-11 02:26:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1707. [2021-10-11 02:26:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2021-10-11 02:26:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2056 transitions. [2021-10-11 02:26:52,898 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2056 transitions. Word has length 111 [2021-10-11 02:26:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:52,898 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 2056 transitions. [2021-10-11 02:26:52,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2056 transitions. [2021-10-11 02:26:52,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-11 02:26:52,904 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:52,904 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:52,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:26:52,905 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:52,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:52,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1033354257, now seen corresponding path program 1 times [2021-10-11 02:26:52,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:52,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979547974] [2021-10-11 02:26:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-11 02:26:53,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979547974] [2021-10-11 02:26:53,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:53,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:53,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913400744] [2021-10-11 02:26:53,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:53,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:53,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:53,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:53,023 INFO L87 Difference]: Start difference. First operand 1707 states and 2056 transitions. Second operand 3 states. [2021-10-11 02:26:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:53,377 INFO L93 Difference]: Finished difference Result 3342 states and 4033 transitions. [2021-10-11 02:26:53,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:53,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2021-10-11 02:26:53,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:53,387 INFO L225 Difference]: With dead ends: 3342 [2021-10-11 02:26:53,387 INFO L226 Difference]: Without dead ends: 1707 [2021-10-11 02:26:53,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-11 02:26:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1707. [2021-10-11 02:26:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2021-10-11 02:26:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2046 transitions. [2021-10-11 02:26:53,434 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2046 transitions. Word has length 127 [2021-10-11 02:26:53,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:53,436 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 2046 transitions. [2021-10-11 02:26:53,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2046 transitions. [2021-10-11 02:26:53,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-10-11 02:26:53,440 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:53,440 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:53,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 02:26:53,440 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1365883303, now seen corresponding path program 1 times [2021-10-11 02:26:53,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:53,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429254573] [2021-10-11 02:26:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-11 02:26:53,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429254573] [2021-10-11 02:26:53,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:53,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:53,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842013976] [2021-10-11 02:26:53,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:53,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:53,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:53,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:53,559 INFO L87 Difference]: Start difference. First operand 1707 states and 2046 transitions. Second operand 4 states. [2021-10-11 02:26:54,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:54,037 INFO L93 Difference]: Finished difference Result 3342 states and 4017 transitions. [2021-10-11 02:26:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:54,038 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2021-10-11 02:26:54,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:54,047 INFO L225 Difference]: With dead ends: 3342 [2021-10-11 02:26:54,047 INFO L226 Difference]: Without dead ends: 1707 [2021-10-11 02:26:54,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-11 02:26:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1707. [2021-10-11 02:26:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2021-10-11 02:26:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2026 transitions. [2021-10-11 02:26:54,090 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2026 transitions. Word has length 131 [2021-10-11 02:26:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:54,091 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 2026 transitions. [2021-10-11 02:26:54,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2026 transitions. [2021-10-11 02:26:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-10-11 02:26:54,095 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:54,095 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:54,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-11 02:26:54,096 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:54,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1083768190, now seen corresponding path program 1 times [2021-10-11 02:26:54,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:54,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144504533] [2021-10-11 02:26:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 96 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-11 02:26:54,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144504533] [2021-10-11 02:26:54,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242698916] [2021-10-11 02:26:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:54,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:26:54,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-11 02:26:54,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-11 02:26:54,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:26:54,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2021-10-11 02:26:54,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968059587] [2021-10-11 02:26:54,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:54,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:54,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:54,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:54,918 INFO L87 Difference]: Start difference. First operand 1707 states and 2026 transitions. Second operand 3 states. [2021-10-11 02:26:55,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:55,236 INFO L93 Difference]: Finished difference Result 3342 states and 3977 transitions. [2021-10-11 02:26:55,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:55,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2021-10-11 02:26:55,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:55,246 INFO L225 Difference]: With dead ends: 3342 [2021-10-11 02:26:55,246 INFO L226 Difference]: Without dead ends: 1707 [2021-10-11 02:26:55,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-11 02:26:55,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1707. [2021-10-11 02:26:55,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2021-10-11 02:26:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2000 transitions. [2021-10-11 02:26:55,292 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2000 transitions. Word has length 148 [2021-10-11 02:26:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:55,292 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 2000 transitions. [2021-10-11 02:26:55,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2000 transitions. [2021-10-11 02:26:55,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-10-11 02:26:55,297 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:55,297 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:55,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-11 02:26:55,512 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2126449258, now seen corresponding path program 1 times [2021-10-11 02:26:55,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:55,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350741995] [2021-10-11 02:26:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 101 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-11 02:26:55,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350741995] [2021-10-11 02:26:55,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373670201] [2021-10-11 02:26:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:55,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:26:55,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-11 02:26:55,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-11 02:26:56,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:26:56,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2021-10-11 02:26:56,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425180451] [2021-10-11 02:26:56,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:56,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:56,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:56,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:56,120 INFO L87 Difference]: Start difference. First operand 1707 states and 2000 transitions. Second operand 3 states. [2021-10-11 02:26:56,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:56,492 INFO L93 Difference]: Finished difference Result 3342 states and 3925 transitions. [2021-10-11 02:26:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:56,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2021-10-11 02:26:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:56,502 INFO L225 Difference]: With dead ends: 3342 [2021-10-11 02:26:56,502 INFO L226 Difference]: Without dead ends: 1707 [2021-10-11 02:26:56,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-11 02:26:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1636. [2021-10-11 02:26:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2021-10-11 02:26:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1856 transitions. [2021-10-11 02:26:56,574 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1856 transitions. Word has length 153 [2021-10-11 02:26:56,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:56,575 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1856 transitions. [2021-10-11 02:26:56,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:56,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1856 transitions. [2021-10-11 02:26:56,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-10-11 02:26:56,579 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:56,579 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:56,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-11 02:26:56,801 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:56,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:56,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1993123444, now seen corresponding path program 1 times [2021-10-11 02:26:56,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:56,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922672061] [2021-10-11 02:26:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-11 02:26:56,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922672061] [2021-10-11 02:26:56,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529851366] [2021-10-11 02:26:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:57,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:26:57,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-11 02:26:57,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-11 02:26:57,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:26:57,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2021-10-11 02:26:57,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188584474] [2021-10-11 02:26:57,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:57,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:57,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:57,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:57,374 INFO L87 Difference]: Start difference. First operand 1636 states and 1856 transitions. Second operand 3 states. [2021-10-11 02:26:57,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:57,694 INFO L93 Difference]: Finished difference Result 1922 states and 2190 transitions. [2021-10-11 02:26:57,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:57,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2021-10-11 02:26:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:57,704 INFO L225 Difference]: With dead ends: 1922 [2021-10-11 02:26:57,704 INFO L226 Difference]: Without dead ends: 1920 [2021-10-11 02:26:57,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:57,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-10-11 02:26:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1778. [2021-10-11 02:26:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1778 states. [2021-10-11 02:26:57,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2028 transitions. [2021-10-11 02:26:57,752 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2028 transitions. Word has length 157 [2021-10-11 02:26:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:57,753 INFO L481 AbstractCegarLoop]: Abstraction has 1778 states and 2028 transitions. [2021-10-11 02:26:57,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:57,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2028 transitions. [2021-10-11 02:26:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-10-11 02:26:57,759 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:57,759 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:57,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-11 02:26:57,976 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:57,977 INFO L82 PathProgramCache]: Analyzing trace with hash 878013139, now seen corresponding path program 1 times [2021-10-11 02:26:57,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:57,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364719706] [2021-10-11 02:26:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 168 proven. 11 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-10-11 02:26:58,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364719706] [2021-10-11 02:26:58,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836223433] [2021-10-11 02:26:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:58,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:26:58,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-10-11 02:26:58,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-10-11 02:26:58,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:26:58,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2021-10-11 02:26:58,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134636698] [2021-10-11 02:26:58,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:58,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:58,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:58,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:58,742 INFO L87 Difference]: Start difference. First operand 1778 states and 2028 transitions. Second operand 3 states. [2021-10-11 02:26:59,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:59,124 INFO L93 Difference]: Finished difference Result 3555 states and 4056 transitions. [2021-10-11 02:26:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:59,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 192 [2021-10-11 02:26:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:59,133 INFO L225 Difference]: With dead ends: 3555 [2021-10-11 02:26:59,133 INFO L226 Difference]: Without dead ends: 1849 [2021-10-11 02:26:59,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 382 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-10-11 02:26:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1565. [2021-10-11 02:26:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2021-10-11 02:26:59,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1744 transitions. [2021-10-11 02:26:59,171 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1744 transitions. Word has length 192 [2021-10-11 02:26:59,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:59,171 INFO L481 AbstractCegarLoop]: Abstraction has 1565 states and 1744 transitions. [2021-10-11 02:26:59,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:59,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1744 transitions. [2021-10-11 02:26:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-10-11 02:26:59,176 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:59,176 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:59,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:59,392 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:59,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:59,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2018013817, now seen corresponding path program 1 times [2021-10-11 02:26:59,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:59,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35697857] [2021-10-11 02:26:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-10-11 02:26:59,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35697857] [2021-10-11 02:26:59,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:59,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:59,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813396716] [2021-10-11 02:26:59,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:59,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:59,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:59,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:59,607 INFO L87 Difference]: Start difference. First operand 1565 states and 1744 transitions. Second operand 4 states. [2021-10-11 02:27:00,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:00,059 INFO L93 Difference]: Finished difference Result 3271 states and 3650 transitions. [2021-10-11 02:27:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:27:00,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 210 [2021-10-11 02:27:00,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:00,067 INFO L225 Difference]: With dead ends: 3271 [2021-10-11 02:27:00,067 INFO L226 Difference]: Without dead ends: 1636 [2021-10-11 02:27:00,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-10-11 02:27:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1494. [2021-10-11 02:27:00,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2021-10-11 02:27:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1633 transitions. [2021-10-11 02:27:00,102 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1633 transitions. Word has length 210 [2021-10-11 02:27:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:00,103 INFO L481 AbstractCegarLoop]: Abstraction has 1494 states and 1633 transitions. [2021-10-11 02:27:00,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1633 transitions. [2021-10-11 02:27:00,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-10-11 02:27:00,109 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:00,109 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:00,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-11 02:27:00,109 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:00,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:00,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1501176846, now seen corresponding path program 1 times [2021-10-11 02:27:00,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:00,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860981544] [2021-10-11 02:27:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 347 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-10-11 02:27:00,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860981544] [2021-10-11 02:27:00,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:00,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:00,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677904888] [2021-10-11 02:27:00,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:00,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:00,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:00,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:00,375 INFO L87 Difference]: Start difference. First operand 1494 states and 1633 transitions. Second operand 3 states. [2021-10-11 02:27:00,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:00,708 INFO L93 Difference]: Finished difference Result 3342 states and 3665 transitions. [2021-10-11 02:27:00,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:00,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 275 [2021-10-11 02:27:00,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:00,717 INFO L225 Difference]: With dead ends: 3342 [2021-10-11 02:27:00,717 INFO L226 Difference]: Without dead ends: 1494 [2021-10-11 02:27:00,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-10-11 02:27:00,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1494. [2021-10-11 02:27:00,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2021-10-11 02:27:00,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1614 transitions. [2021-10-11 02:27:00,751 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1614 transitions. Word has length 275 [2021-10-11 02:27:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:00,752 INFO L481 AbstractCegarLoop]: Abstraction has 1494 states and 1614 transitions. [2021-10-11 02:27:00,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:00,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1614 transitions. [2021-10-11 02:27:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-10-11 02:27:00,758 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:00,758 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:00,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-11 02:27:00,759 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:00,759 INFO L82 PathProgramCache]: Analyzing trace with hash -2062653587, now seen corresponding path program 1 times [2021-10-11 02:27:00,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:00,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889750647] [2021-10-11 02:27:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-10-11 02:27:00,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889750647] [2021-10-11 02:27:00,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:00,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:00,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460836995] [2021-10-11 02:27:00,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:00,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:00,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:00,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:00,955 INFO L87 Difference]: Start difference. First operand 1494 states and 1614 transitions. Second operand 3 states. [2021-10-11 02:27:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:01,235 INFO L93 Difference]: Finished difference Result 2488 states and 2702 transitions. [2021-10-11 02:27:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:01,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 287 [2021-10-11 02:27:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:01,236 INFO L225 Difference]: With dead ends: 2488 [2021-10-11 02:27:01,237 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:27:01,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:27:01,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:27:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:27:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:27:01,240 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 287 [2021-10-11 02:27:01,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:01,240 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:27:01,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:27:01,240 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:27:01,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-11 02:27:01,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:27:01,801 WARN L197 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-10-11 02:27:02,195 WARN L197 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-10-11 02:27:02,198 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-11 02:27:02,198 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-11 02:27:02,199 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-11 02:27:02,199 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-11 02:27:02,199 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-11 02:27:02,199 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-11 02:27:02,199 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-11 02:27:02,199 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-11 02:27:02,199 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-11 02:27:02,199 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-11 02:27:02,199 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-11 02:27:02,199 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-11 02:27:02,200 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-11 02:27:02,200 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-11 02:27:02,200 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-11 02:27:02,200 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-11 02:27:02,200 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-11 02:27:02,200 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-11 02:27:02,200 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-11 02:27:02,200 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-11 02:27:02,200 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-11 02:27:02,201 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-11 02:27:02,201 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-11 02:27:02,201 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-11 02:27:02,201 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-11 02:27:02,201 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-11 02:27:02,201 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-11 02:27:02,201 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-11 02:27:02,201 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-11 02:27:02,201 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-11 02:27:02,201 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-11 02:27:02,202 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-11 02:27:02,202 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-11 02:27:02,202 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-11 02:27:02,202 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-11 02:27:02,202 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-11 02:27:02,202 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:27:02,202 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-11 02:27:02,202 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-11 02:27:02,202 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-11 02:27:02,203 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse1 (<= ~a16~0 4)) (.cse6 (<= ~a21~0 0)) (.cse4 (= ~a20~0 1)) (.cse5 (= ~a17~0 1)) (.cse2 (<= ~a8~0 13)) (.cse8 (<= ~a7~0 0)) (.cse9 (<= ~a8~0 14)) (.cse7 (= ~a21~0 1)) (.cse0 (= ~a7~0 1)) (.cse10 (<= ~a16~0 5)) (.cse3 (<= ~a20~0 0))) (or (and .cse0 .cse1 .cse2 .cse3) (and (or (and .cse1 .cse4 .cse5 .cse2) (and .cse1 .cse6 .cse4 .cse2)) .cse0) (and .cse0 .cse6 .cse4 .cse5 .cse2) (and .cse7 .cse8 .cse4) (and .cse9 .cse7 .cse4 (<= 5 ~a16~0)) (and (<= 6 ~a16~0) .cse0 .cse4 .cse2) (and .cse7 .cse4 .cse5 .cse2) (and .cse7 .cse8 .cse3) (and .cse9 .cse7 .cse10 .cse3) (and .cse7 .cse0 .cse10 .cse3))) [2021-10-11 02:27:02,203 INFO L262 CegarLoopResult]: For program point L452-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:27:02,203 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-11 02:27:02,203 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-11 02:27:02,203 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-11 02:27:02,204 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-11 02:27:02,204 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-11 02:27:02,204 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-11 02:27:02,204 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-11 02:27:02,207 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:27:02,207 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-11 02:27:02,208 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-11 02:27:02,208 INFO L262 CegarLoopResult]: For program point L455-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:27:02,208 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-11 02:27:02,215 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-11 02:27:02,215 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-11 02:27:02,215 INFO L262 CegarLoopResult]: For program point L456(line 456) no Hoare annotation was computed. [2021-10-11 02:27:02,216 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-11 02:27:02,216 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-11 02:27:02,216 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-11 02:27:02,216 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-11 02:27:02,216 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-11 02:27:02,216 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-11 02:27:02,216 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-11 02:27:02,217 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-11 02:27:02,217 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-11 02:27:02,217 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-11 02:27:02,217 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse1 (<= ~a16~0 4)) (.cse6 (<= ~a21~0 0)) (.cse4 (= ~a20~0 1)) (.cse5 (= ~a17~0 1)) (.cse2 (<= ~a8~0 13)) (.cse8 (<= ~a7~0 0)) (.cse9 (<= ~a8~0 14)) (.cse7 (= ~a21~0 1)) (.cse0 (= ~a7~0 1)) (.cse10 (<= ~a16~0 5)) (.cse3 (<= ~a20~0 0))) (or (and .cse0 .cse1 .cse2 .cse3) (and (or (and .cse1 .cse4 .cse5 .cse2) (and .cse1 .cse6 .cse4 .cse2)) .cse0) (and .cse0 .cse6 .cse4 .cse5 .cse2) (and .cse7 .cse8 .cse4) (and .cse9 .cse7 .cse4 (<= 5 ~a16~0)) (and (<= 6 ~a16~0) .cse0 .cse4 .cse2) (and .cse7 .cse4 .cse5 .cse2) (and .cse7 .cse8 .cse3) (and .cse9 .cse7 .cse10 .cse3) (and .cse7 .cse0 .cse10 .cse3))) [2021-10-11 02:27:02,218 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-11 02:27:02,218 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 456) no Hoare annotation was computed. [2021-10-11 02:27:02,218 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-11 02:27:02,218 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-11 02:27:02,218 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-11 02:27:02,218 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-11 02:27:02,218 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-11 02:27:02,219 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-11 02:27:02,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:27:02 BoogieIcfgContainer [2021-10-11 02:27:02,267 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:27:02,268 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:27:02,268 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:27:02,268 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:27:02,269 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:47" (3/4) ... [2021-10-11 02:27:02,272 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:27:02,303 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2021-10-11 02:27:02,305 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-11 02:27:02,306 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-11 02:27:02,308 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-11 02:27:02,472 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b00ad116-582e-44b6-9fc6-cdf48eef552e/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:27:02,472 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:27:02,474 INFO L168 Benchmark]: Toolchain (without parser) took 18753.50 ms. Allocated memory was 121.6 MB in the beginning and 486.5 MB in the end (delta: 364.9 MB). Free memory was 84.6 MB in the beginning and 432.6 MB in the end (delta: -348.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:02,474 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 121.6 MB. Free memory was 95.3 MB in the beginning and 95.3 MB in the end (delta: 25.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:02,475 INFO L168 Benchmark]: CACSL2BoogieTranslator took 658.75 ms. Allocated memory is still 121.6 MB. Free memory was 84.4 MB in the beginning and 80.1 MB in the end (delta: 4.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:02,475 INFO L168 Benchmark]: Boogie Procedure Inliner took 123.91 ms. Allocated memory is still 121.6 MB. Free memory was 80.1 MB in the beginning and 74.4 MB in the end (delta: 5.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:02,476 INFO L168 Benchmark]: Boogie Preprocessor took 92.43 ms. Allocated memory is still 121.6 MB. Free memory was 74.4 MB in the beginning and 70.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:02,476 INFO L168 Benchmark]: RCFGBuilder took 2496.64 ms. Allocated memory was 121.6 MB in the beginning and 167.8 MB in the end (delta: 46.1 MB). Free memory was 70.2 MB in the beginning and 66.3 MB in the end (delta: 3.9 MB). Peak memory consumption was 56.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:02,476 INFO L168 Benchmark]: TraceAbstraction took 15156.57 ms. Allocated memory was 167.8 MB in the beginning and 486.5 MB in the end (delta: 318.8 MB). Free memory was 135.1 MB in the beginning and 448.5 MB in the end (delta: -313.4 MB). Peak memory consumption was 241.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:02,477 INFO L168 Benchmark]: Witness Printer took 204.76 ms. Allocated memory is still 486.5 MB. Free memory was 448.5 MB in the beginning and 432.6 MB in the end (delta: 15.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:02,479 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 121.6 MB. Free memory was 95.3 MB in the beginning and 95.3 MB in the end (delta: 25.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 658.75 ms. Allocated memory is still 121.6 MB. Free memory was 84.4 MB in the beginning and 80.1 MB in the end (delta: 4.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 123.91 ms. Allocated memory is still 121.6 MB. Free memory was 80.1 MB in the beginning and 74.4 MB in the end (delta: 5.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 92.43 ms. Allocated memory is still 121.6 MB. Free memory was 74.4 MB in the beginning and 70.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2496.64 ms. Allocated memory was 121.6 MB in the beginning and 167.8 MB in the end (delta: 46.1 MB). Free memory was 70.2 MB in the beginning and 66.3 MB in the end (delta: 3.9 MB). Peak memory consumption was 56.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15156.57 ms. Allocated memory was 167.8 MB in the beginning and 486.5 MB in the end (delta: 318.8 MB). Free memory was 135.1 MB in the beginning and 448.5 MB in the end (delta: -313.4 MB). Peak memory consumption was 241.3 MB. Max. memory is 16.1 GB. * Witness Printer took 204.76 ms. Allocated memory is still 486.5 MB. Free memory was 448.5 MB in the beginning and 432.6 MB in the end (delta: 15.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 456]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((((((a7 == 1 && a16 <= 4) && a8 <= 13) && a20 <= 0) || (((((a16 <= 4 && a20 == 1) && a17 == 1) && a8 <= 13) || (((a16 <= 4 && a21 <= 0) && a20 == 1) && a8 <= 13)) && a7 == 1)) || ((((a7 == 1 && a21 <= 0) && a20 == 1) && a17 == 1) && a8 <= 13)) || ((a21 == 1 && a7 <= 0) && a20 == 1)) || (((a8 <= 14 && a21 == 1) && a20 == 1) && 5 <= a16)) || (((6 <= a16 && a7 == 1) && a20 == 1) && a8 <= 13)) || (((a21 == 1 && a20 == 1) && a17 == 1) && a8 <= 13)) || ((a21 == 1 && a7 <= 0) && a20 <= 0)) || (((a8 <= 14 && a21 == 1) && a16 <= 5) && a20 <= 0)) || (((a21 == 1 && a7 == 1) && a16 <= 5) && a20 <= 0) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((((((((a7 == 1 && a16 <= 4) && a8 <= 13) && a20 <= 0) || (((((a16 <= 4 && a20 == 1) && a17 == 1) && a8 <= 13) || (((a16 <= 4 && a21 <= 0) && a20 == 1) && a8 <= 13)) && a7 == 1)) || ((((a7 == 1 && a21 <= 0) && a20 == 1) && a17 == 1) && a8 <= 13)) || ((a21 == 1 && a7 <= 0) && a20 == 1)) || (((a8 <= 14 && a21 == 1) && a20 == 1) && 5 <= a16)) || (((6 <= a16 && a7 == 1) && a20 == 1) && a8 <= 13)) || (((a21 == 1 && a20 == 1) && a17 == 1) && a8 <= 13)) || ((a21 == 1 && a7 <= 0) && a20 <= 0)) || (((a8 <= 14 && a21 == 1) && a16 <= 5) && a20 <= 0)) || (((a21 == 1 && a7 == 1) && a16 <= 5) && a20 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.0s, OverallIterations: 18, TraceHistogramMax: 8, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1099 SDtfs, 1175 SDslu, 74 SDs, 0 SdLazy, 3864 SolverSat, 811 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1344 GetRequests, 1311 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1778occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 18 MinimizatonAttempts, 1420 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 55 NumberOfFragments, 293 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2326 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 446 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 3149 NumberOfCodeBlocks, 3149 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 3773 ConstructedInterpolants, 0 QuantifiedInterpolants, 1269135 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1602 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 26 InterpolantComputations, 22 PerfectInterpolantSequences, 3786/3830 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...