./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label47.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label47.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs --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 69e53a5f887b798320aa40402d512baa70efc113 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:55:50,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:55:50,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:55:50,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:55:50,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:55:50,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:55:50,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:55:50,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:55:50,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:55:50,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:55:50,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:55:50,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:55:50,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:55:50,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:55:50,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:55:50,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:55:50,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:55:50,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:55:50,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:55:50,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:55:50,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:55:50,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:55:50,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:55:50,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:55:50,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:55:50,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:55:50,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:55:50,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:55:50,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:55:50,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:55:50,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:55:50,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:55:50,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:55:50,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:55:50,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:55:50,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:55:50,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:55:50,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:55:50,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:55:50,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:55:50,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:55:50,595 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:55:50,655 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:55:50,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:55:50,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:55:50,658 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:55:50,659 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:55:50,659 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:55:50,659 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:55:50,659 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:55:50,664 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:55:50,664 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:55:50,666 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:55:50,666 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:55:50,666 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:55:50,667 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:55:50,667 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:55:50,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:55:50,669 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:55:50,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:55:50,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:55:50,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:55:50,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:55:50,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:55:50,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:55:50,680 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:55:50,680 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:55:50,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:55:50,681 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:55:50,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:55:50,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:55:50,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:55:50,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:55:50,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:55:50,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:55:50,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:55:50,688 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:55:50,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:55:50,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:55:50,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:55:50,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:55:50,689 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_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69e53a5f887b798320aa40402d512baa70efc113 [2021-10-16 02:55:51,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:55:51,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:55:51,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:55:51,059 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:55:51,060 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:55:51,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/eca-rers2012/Problem02_label47.c [2021-10-16 02:55:51,148 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/data/f28eaec32/204f6e6b51fe4f74b176b8e84730b331/FLAGefad7ab58 [2021-10-16 02:55:51,901 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:55:51,906 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/sv-benchmarks/c/eca-rers2012/Problem02_label47.c [2021-10-16 02:55:51,929 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/data/f28eaec32/204f6e6b51fe4f74b176b8e84730b331/FLAGefad7ab58 [2021-10-16 02:55:52,076 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/data/f28eaec32/204f6e6b51fe4f74b176b8e84730b331 [2021-10-16 02:55:52,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:55:52,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:55:52,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:55:52,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:55:52,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:55:52,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:55:52" (1/1) ... [2021-10-16 02:55:52,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d79c5ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:55:52, skipping insertion in model container [2021-10-16 02:55:52,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:55:52" (1/1) ... [2021-10-16 02:55:52,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:55:52,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:55:52,609 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/sv-benchmarks/c/eca-rers2012/Problem02_label47.c[17583,17596] [2021-10-16 02:55:52,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:55:52,690 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:55:52,815 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/sv-benchmarks/c/eca-rers2012/Problem02_label47.c[17583,17596] [2021-10-16 02:55:52,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:55:52,847 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:55:52,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:55:52 WrapperNode [2021-10-16 02:55:52,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:55:52,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:55:52,850 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:55:52,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:55:52,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:55:52" (1/1) ... [2021-10-16 02:55:52,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:55:52" (1/1) ... [2021-10-16 02:55:52,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:55:52,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:55:52,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:55:52,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:55:52,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:55:52" (1/1) ... [2021-10-16 02:55:52,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:55:52" (1/1) ... [2021-10-16 02:55:52,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:55:52" (1/1) ... [2021-10-16 02:55:52,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:55:52" (1/1) ... [2021-10-16 02:55:53,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:55:52" (1/1) ... [2021-10-16 02:55:53,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:55:52" (1/1) ... [2021-10-16 02:55:53,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:55:52" (1/1) ... [2021-10-16 02:55:53,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:55:53,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:55:53,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:55:53,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:55:53,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:55:52" (1/1) ... [2021-10-16 02:55:53,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:55:53,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:55:53,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:55:53,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:55:53,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:55:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:55:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:55:53,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:55:55,421 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:55:55,421 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:55:55,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:55:55 BoogieIcfgContainer [2021-10-16 02:55:55,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:55:55,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:55:55,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:55:55,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:55:55,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:55:52" (1/3) ... [2021-10-16 02:55:55,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f392ba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:55:55, skipping insertion in model container [2021-10-16 02:55:55,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:55:52" (2/3) ... [2021-10-16 02:55:55,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f392ba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:55:55, skipping insertion in model container [2021-10-16 02:55:55,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:55:55" (3/3) ... [2021-10-16 02:55:55,439 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label47.c [2021-10-16 02:55:55,450 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:55:55,450 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:55:55,533 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:55:55,544 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:55:55,544 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:55:55,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:55:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-16 02:55:55,585 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:55:55,586 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:55:55,587 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:55:55,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:55:55,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1243324083, now seen corresponding path program 1 times [2021-10-16 02:55:55,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:55:55,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309949486] [2021-10-16 02:55:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:55:55,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:55:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:55:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:56,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:55:56,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309949486] [2021-10-16 02:55:56,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309949486] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:55:56,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:55:56,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:55:56,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552811895] [2021-10-16 02:55:56,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:55:56,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:55:56,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:55:56,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:55:56,194 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:55:56,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:55:56,791 INFO L93 Difference]: Finished difference Result 251 states and 482 transitions. [2021-10-16 02:55:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:55:56,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-10-16 02:55:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:55:56,821 INFO L225 Difference]: With dead ends: 251 [2021-10-16 02:55:56,821 INFO L226 Difference]: Without dead ends: 163 [2021-10-16 02:55:56,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:55:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-16 02:55:56,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-10-16 02:55:56,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.8395061728395061) internal successors, (298), 162 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:55:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 298 transitions. [2021-10-16 02:55:56,922 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 298 transitions. Word has length 80 [2021-10-16 02:55:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:55:56,924 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 298 transitions. [2021-10-16 02:55:56,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:55:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 298 transitions. [2021-10-16 02:55:56,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-16 02:55:56,931 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:55:56,932 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:55:56,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:55:56,933 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:55:56,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:55:56,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1833066152, now seen corresponding path program 1 times [2021-10-16 02:55:56,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:55:56,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396258574] [2021-10-16 02:55:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:55:56,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:55:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:55:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:57,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:55:57,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396258574] [2021-10-16 02:55:57,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396258574] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:55:57,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:55:57,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:55:57,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285061589] [2021-10-16 02:55:57,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:55:57,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:55:57,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:55:57,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:55:57,070 INFO L87 Difference]: Start difference. First operand 163 states and 298 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:55:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:55:57,544 INFO L93 Difference]: Finished difference Result 485 states and 891 transitions. [2021-10-16 02:55:57,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:55:57,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-10-16 02:55:57,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:55:57,549 INFO L225 Difference]: With dead ends: 485 [2021-10-16 02:55:57,549 INFO L226 Difference]: Without dead ends: 323 [2021-10-16 02:55:57,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:55:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-16 02:55:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-10-16 02:55:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.515527950310559) internal successors, (488), 322 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:55:57,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 488 transitions. [2021-10-16 02:55:57,575 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 488 transitions. Word has length 84 [2021-10-16 02:55:57,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:55:57,576 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 488 transitions. [2021-10-16 02:55:57,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:55:57,577 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 488 transitions. [2021-10-16 02:55:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-16 02:55:57,585 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:55:57,586 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:55:57,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:55:57,587 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:55:57,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:55:57,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2045181971, now seen corresponding path program 1 times [2021-10-16 02:55:57,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:55:57,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094633619] [2021-10-16 02:55:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:55:57,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:55:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:55:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:57,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:55:57,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094633619] [2021-10-16 02:55:57,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094633619] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:55:57,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:55:57,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:55:57,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043293937] [2021-10-16 02:55:57,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:55:57,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:55:57,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:55:57,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:55:57,710 INFO L87 Difference]: Start difference. First operand 323 states and 488 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:55:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:55:58,153 INFO L93 Difference]: Finished difference Result 805 states and 1271 transitions. [2021-10-16 02:55:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:55:58,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-10-16 02:55:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:55:58,158 INFO L225 Difference]: With dead ends: 805 [2021-10-16 02:55:58,159 INFO L226 Difference]: Without dead ends: 483 [2021-10-16 02:55:58,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:55:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-10-16 02:55:58,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2021-10-16 02:55:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.4066390041493777) internal successors, (678), 482 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:55:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 678 transitions. [2021-10-16 02:55:58,185 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 678 transitions. Word has length 89 [2021-10-16 02:55:58,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:55:58,186 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 678 transitions. [2021-10-16 02:55:58,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:55:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 678 transitions. [2021-10-16 02:55:58,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-16 02:55:58,193 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:55:58,194 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:55:58,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:55:58,194 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:55:58,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:55:58,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2122121154, now seen corresponding path program 1 times [2021-10-16 02:55:58,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:55:58,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73564812] [2021-10-16 02:55:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:55:58,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:55:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:55:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:58,305 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:55:58,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73564812] [2021-10-16 02:55:58,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73564812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:55:58,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345917909] [2021-10-16 02:55:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:55:58,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:55:58,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:55:58,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:55:58,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:55:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:55:58,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:55:58,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:55:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-16 02:55:58,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:55:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-16 02:55:59,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345917909] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:55:59,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:55:59,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2021-10-16 02:55:59,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123845553] [2021-10-16 02:55:59,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:55:59,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:55:59,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:55:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:55:59,223 INFO L87 Difference]: Start difference. First operand 483 states and 678 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:55:59,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:55:59,696 INFO L93 Difference]: Finished difference Result 1285 states and 1841 transitions. [2021-10-16 02:55:59,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:55:59,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-10-16 02:55:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:55:59,717 INFO L225 Difference]: With dead ends: 1285 [2021-10-16 02:55:59,718 INFO L226 Difference]: Without dead ends: 803 [2021-10-16 02:55:59,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:55:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-10-16 02:55:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 803. [2021-10-16 02:55:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.4064837905236909) internal successors, (1128), 802 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:55:59,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1128 transitions. [2021-10-16 02:55:59,778 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1128 transitions. Word has length 89 [2021-10-16 02:55:59,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:55:59,779 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1128 transitions. [2021-10-16 02:55:59,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:55:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1128 transitions. [2021-10-16 02:55:59,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-16 02:55:59,783 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:55:59,783 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:55:59,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:56:00,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:00,009 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:56:00,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:00,010 INFO L82 PathProgramCache]: Analyzing trace with hash -522280905, now seen corresponding path program 1 times [2021-10-16 02:56:00,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:00,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048253449] [2021-10-16 02:56:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:00,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:56:00,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:00,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048253449] [2021-10-16 02:56:00,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048253449] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:00,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:00,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:56:00,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281854714] [2021-10-16 02:56:00,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:56:00,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:00,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:56:00,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:00,092 INFO L87 Difference]: Start difference. First operand 803 states and 1128 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:00,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:00,593 INFO L93 Difference]: Finished difference Result 2085 states and 2931 transitions. [2021-10-16 02:56:00,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:56:00,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-10-16 02:56:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:00,604 INFO L225 Difference]: With dead ends: 2085 [2021-10-16 02:56:00,604 INFO L226 Difference]: Without dead ends: 1283 [2021-10-16 02:56:00,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-10-16 02:56:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1283. [2021-10-16 02:56:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 1.3096723868954758) internal successors, (1679), 1282 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1679 transitions. [2021-10-16 02:56:00,647 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1679 transitions. Word has length 93 [2021-10-16 02:56:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:00,648 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 1679 transitions. [2021-10-16 02:56:00,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1679 transitions. [2021-10-16 02:56:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-16 02:56:00,652 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:00,652 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:56:00,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:56:00,653 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:56:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash 131051692, now seen corresponding path program 1 times [2021-10-16 02:56:00,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:00,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024459011] [2021-10-16 02:56:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:00,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:56:00,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:00,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024459011] [2021-10-16 02:56:00,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024459011] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:00,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:00,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:56:00,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177608997] [2021-10-16 02:56:00,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:56:00,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:00,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:56:00,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:00,699 INFO L87 Difference]: Start difference. First operand 1283 states and 1679 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:01,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:01,151 INFO L93 Difference]: Finished difference Result 3045 states and 4103 transitions. [2021-10-16 02:56:01,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:56:01,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-10-16 02:56:01,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:01,165 INFO L225 Difference]: With dead ends: 3045 [2021-10-16 02:56:01,166 INFO L226 Difference]: Without dead ends: 1763 [2021-10-16 02:56:01,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:01,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-10-16 02:56:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1763. [2021-10-16 02:56:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 1.2911464245175936) internal successors, (2275), 1762 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2275 transitions. [2021-10-16 02:56:01,225 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2275 transitions. Word has length 94 [2021-10-16 02:56:01,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:01,226 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 2275 transitions. [2021-10-16 02:56:01,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:01,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2275 transitions. [2021-10-16 02:56:01,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-16 02:56:01,231 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:01,231 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:56:01,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 02:56:01,232 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:56:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:01,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1065432091, now seen corresponding path program 1 times [2021-10-16 02:56:01,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:01,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876778020] [2021-10-16 02:56:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:01,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:56:01,331 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:01,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876778020] [2021-10-16 02:56:01,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876778020] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:01,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:01,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:56:01,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65496295] [2021-10-16 02:56:01,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:56:01,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:01,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:56:01,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:01,334 INFO L87 Difference]: Start difference. First operand 1763 states and 2275 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:01,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:01,729 INFO L93 Difference]: Finished difference Result 3525 states and 4549 transitions. [2021-10-16 02:56:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:56:01,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-10-16 02:56:01,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:01,744 INFO L225 Difference]: With dead ends: 3525 [2021-10-16 02:56:01,745 INFO L226 Difference]: Without dead ends: 1763 [2021-10-16 02:56:01,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-10-16 02:56:01,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1603. [2021-10-16 02:56:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 1.2596754057428214) internal successors, (2018), 1602 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2018 transitions. [2021-10-16 02:56:01,796 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2018 transitions. Word has length 113 [2021-10-16 02:56:01,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:01,796 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 2018 transitions. [2021-10-16 02:56:01,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2018 transitions. [2021-10-16 02:56:01,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-16 02:56:01,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:01,804 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:56:01,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 02:56:01,804 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:56:01,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:01,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1275029979, now seen corresponding path program 1 times [2021-10-16 02:56:01,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:01,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322458507] [2021-10-16 02:56:01,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:01,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:56:01,895 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:01,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322458507] [2021-10-16 02:56:01,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322458507] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:01,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:01,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:56:01,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383714944] [2021-10-16 02:56:01,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:56:01,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:01,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:56:01,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:01,899 INFO L87 Difference]: Start difference. First operand 1603 states and 2018 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:02,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:02,290 INFO L93 Difference]: Finished difference Result 3045 states and 3865 transitions. [2021-10-16 02:56:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:56:02,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-10-16 02:56:02,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:02,301 INFO L225 Difference]: With dead ends: 3045 [2021-10-16 02:56:02,301 INFO L226 Difference]: Without dead ends: 1443 [2021-10-16 02:56:02,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-10-16 02:56:02,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1443. [2021-10-16 02:56:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 1.2295423023578362) internal successors, (1773), 1442 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 1773 transitions. [2021-10-16 02:56:02,344 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 1773 transitions. Word has length 122 [2021-10-16 02:56:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:02,345 INFO L470 AbstractCegarLoop]: Abstraction has 1443 states and 1773 transitions. [2021-10-16 02:56:02,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:02,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 1773 transitions. [2021-10-16 02:56:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-10-16 02:56:02,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:02,351 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:56:02,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 02:56:02,351 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:56:02,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:02,352 INFO L82 PathProgramCache]: Analyzing trace with hash -158022762, now seen corresponding path program 1 times [2021-10-16 02:56:02,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:02,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706816508] [2021-10-16 02:56:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:02,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-16 02:56:02,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:02,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706816508] [2021-10-16 02:56:02,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706816508] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:02,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:02,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:56:02,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235716129] [2021-10-16 02:56:02,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:56:02,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:02,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:56:02,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:02,431 INFO L87 Difference]: Start difference. First operand 1443 states and 1773 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:02,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:02,679 INFO L93 Difference]: Finished difference Result 2645 states and 3285 transitions. [2021-10-16 02:56:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:56:02,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-10-16 02:56:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:02,688 INFO L225 Difference]: With dead ends: 2645 [2021-10-16 02:56:02,688 INFO L226 Difference]: Without dead ends: 1123 [2021-10-16 02:56:02,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-10-16 02:56:02,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1123. [2021-10-16 02:56:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 1.2165775401069518) internal successors, (1365), 1122 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1365 transitions. [2021-10-16 02:56:02,722 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1365 transitions. Word has length 148 [2021-10-16 02:56:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:02,723 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1365 transitions. [2021-10-16 02:56:02,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1365 transitions. [2021-10-16 02:56:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-10-16 02:56:02,728 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:02,728 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-16 02:56:02,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 02:56:02,729 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:56:02,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:02,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1747197601, now seen corresponding path program 1 times [2021-10-16 02:56:02,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:02,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300505014] [2021-10-16 02:56:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:02,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-16 02:56:02,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:02,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300505014] [2021-10-16 02:56:02,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300505014] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:02,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:02,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:56:02,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159152208] [2021-10-16 02:56:02,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:56:02,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:02,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:56:02,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:02,806 INFO L87 Difference]: Start difference. First operand 1123 states and 1365 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:03,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:03,171 INFO L93 Difference]: Finished difference Result 2565 states and 3180 transitions. [2021-10-16 02:56:03,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:56:03,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-10-16 02:56:03,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:03,182 INFO L225 Difference]: With dead ends: 2565 [2021-10-16 02:56:03,182 INFO L226 Difference]: Without dead ends: 1523 [2021-10-16 02:56:03,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2021-10-16 02:56:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1363. [2021-10-16 02:56:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 1.2261380323054332) internal successors, (1670), 1362 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 1670 transitions. [2021-10-16 02:56:03,223 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 1670 transitions. Word has length 161 [2021-10-16 02:56:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:03,223 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 1670 transitions. [2021-10-16 02:56:03,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 1670 transitions. [2021-10-16 02:56:03,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-10-16 02:56:03,229 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:03,229 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 4, 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, 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] [2021-10-16 02:56:03,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-16 02:56:03,230 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:56:03,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:03,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1882649316, now seen corresponding path program 1 times [2021-10-16 02:56:03,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:03,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746931742] [2021-10-16 02:56:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:03,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-16 02:56:03,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:03,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746931742] [2021-10-16 02:56:03,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746931742] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:03,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:03,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:56:03,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147662958] [2021-10-16 02:56:03,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:56:03,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:56:03,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:03,331 INFO L87 Difference]: Start difference. First operand 1363 states and 1670 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:03,684 INFO L93 Difference]: Finished difference Result 2325 states and 2839 transitions. [2021-10-16 02:56:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:56:03,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-10-16 02:56:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:03,694 INFO L225 Difference]: With dead ends: 2325 [2021-10-16 02:56:03,694 INFO L226 Difference]: Without dead ends: 1123 [2021-10-16 02:56:03,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:56:03,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-10-16 02:56:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1123. [2021-10-16 02:56:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 1.1096256684491979) internal successors, (1245), 1122 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1245 transitions. [2021-10-16 02:56:03,739 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1245 transitions. Word has length 174 [2021-10-16 02:56:03,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:03,740 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1245 transitions. [2021-10-16 02:56:03,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1245 transitions. [2021-10-16 02:56:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-10-16 02:56:03,744 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:03,744 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 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, 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] [2021-10-16 02:56:03,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-16 02:56:03,745 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:56:03,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:03,745 INFO L82 PathProgramCache]: Analyzing trace with hash 664507151, now seen corresponding path program 1 times [2021-10-16 02:56:03,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:03,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903404499] [2021-10-16 02:56:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:03,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:56:03,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:03,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903404499] [2021-10-16 02:56:03,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903404499] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:03,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:03,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:56:03,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089522200] [2021-10-16 02:56:03,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:56:03,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:56:03,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:56:03,891 INFO L87 Difference]: Start difference. First operand 1123 states and 1245 transitions. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:04,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:04,347 INFO L93 Difference]: Finished difference Result 2165 states and 2406 transitions. [2021-10-16 02:56:04,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:56:04,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-10-16 02:56:04,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:04,356 INFO L225 Difference]: With dead ends: 2165 [2021-10-16 02:56:04,356 INFO L226 Difference]: Without dead ends: 1123 [2021-10-16 02:56:04,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:56:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-10-16 02:56:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1123. [2021-10-16 02:56:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 1.1042780748663101) internal successors, (1239), 1122 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1239 transitions. [2021-10-16 02:56:04,396 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1239 transitions. Word has length 187 [2021-10-16 02:56:04,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:04,397 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1239 transitions. [2021-10-16 02:56:04,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1239 transitions. [2021-10-16 02:56:04,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-10-16 02:56:04,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:04,402 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-10-16 02:56:04,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-16 02:56:04,403 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:56:04,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:04,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1321376543, now seen corresponding path program 1 times [2021-10-16 02:56:04,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:04,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134535023] [2021-10-16 02:56:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:04,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 157 proven. 63 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:56:04,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:04,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134535023] [2021-10-16 02:56:04,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134535023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:56:04,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19985860] [2021-10-16 02:56:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:04,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:04,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:56:04,557 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:56:04,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:56:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:04,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:56:04,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-10-16 02:56:05,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-10-16 02:56:06,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19985860] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:06,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:56:06,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2021-10-16 02:56:06,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948247650] [2021-10-16 02:56:06,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:56:06,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:06,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:56:06,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:56:06,054 INFO L87 Difference]: Start difference. First operand 1123 states and 1239 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:06,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:06,368 INFO L93 Difference]: Finished difference Result 2405 states and 2671 transitions. [2021-10-16 02:56:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:56:06,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2021-10-16 02:56:06,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:06,378 INFO L225 Difference]: With dead ends: 2405 [2021-10-16 02:56:06,378 INFO L226 Difference]: Without dead ends: 1363 [2021-10-16 02:56:06,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 436 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:56:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-10-16 02:56:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1283. [2021-10-16 02:56:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 1.094383775351014) internal successors, (1403), 1282 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1403 transitions. [2021-10-16 02:56:06,419 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1403 transitions. Word has length 219 [2021-10-16 02:56:06,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:06,420 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 1403 transitions. [2021-10-16 02:56:06,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:06,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1403 transitions. [2021-10-16 02:56:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-10-16 02:56:06,426 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:06,427 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:56:06,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:56:06,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-16 02:56:06,641 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:56:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1724317308, now seen corresponding path program 1 times [2021-10-16 02:56:06,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:06,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878342849] [2021-10-16 02:56:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:06,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 297 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-16 02:56:06,780 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:06,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878342849] [2021-10-16 02:56:06,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878342849] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:06,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:06,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:56:06,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911207198] [2021-10-16 02:56:06,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:56:06,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:06,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:56:06,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:56:06,784 INFO L87 Difference]: Start difference. First operand 1283 states and 1403 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:07,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:07,235 INFO L93 Difference]: Finished difference Result 2485 states and 2722 transitions. [2021-10-16 02:56:07,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:56:07,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2021-10-16 02:56:07,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:07,244 INFO L225 Difference]: With dead ends: 2485 [2021-10-16 02:56:07,244 INFO L226 Difference]: Without dead ends: 1283 [2021-10-16 02:56:07,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:56:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-10-16 02:56:07,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1283. [2021-10-16 02:56:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 1.0873634945397816) internal successors, (1394), 1282 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:07,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1394 transitions. [2021-10-16 02:56:07,283 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1394 transitions. Word has length 232 [2021-10-16 02:56:07,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:07,284 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 1394 transitions. [2021-10-16 02:56:07,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:07,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1394 transitions. [2021-10-16 02:56:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-10-16 02:56:07,294 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:07,295 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-10-16 02:56:07,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-16 02:56:07,295 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:56:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:07,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1473431533, now seen corresponding path program 1 times [2021-10-16 02:56:07,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:07,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218615599] [2021-10-16 02:56:07,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:07,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 222 proven. 94 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-10-16 02:56:07,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:07,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218615599] [2021-10-16 02:56:07,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218615599] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:56:07,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119825866] [2021-10-16 02:56:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:07,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:07,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:56:07,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:56:07,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:56:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:08,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:56:08,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-10-16 02:56:08,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-10-16 02:56:09,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119825866] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:09,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:56:09,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-16 02:56:09,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230800146] [2021-10-16 02:56:09,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:56:09,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:09,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:56:09,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:56:09,446 INFO L87 Difference]: Start difference. First operand 1283 states and 1394 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:09,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:09,730 INFO L93 Difference]: Finished difference Result 2245 states and 2465 transitions. [2021-10-16 02:56:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:56:09,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2021-10-16 02:56:09,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:09,738 INFO L225 Difference]: With dead ends: 2245 [2021-10-16 02:56:09,738 INFO L226 Difference]: Without dead ends: 1043 [2021-10-16 02:56:09,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:56:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-10-16 02:56:09,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1043. [2021-10-16 02:56:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 1.079654510556622) internal successors, (1125), 1042 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1125 transitions. [2021-10-16 02:56:09,769 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1125 transitions. Word has length 267 [2021-10-16 02:56:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:09,770 INFO L470 AbstractCegarLoop]: Abstraction has 1043 states and 1125 transitions. [2021-10-16 02:56:09,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1125 transitions. [2021-10-16 02:56:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-10-16 02:56:09,776 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:09,777 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 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] [2021-10-16 02:56:09,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:56:09,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-16 02:56:09,995 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:56:09,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:09,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1581974389, now seen corresponding path program 1 times [2021-10-16 02:56:09,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:56:09,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155541459] [2021-10-16 02:56:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:09,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:56:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 237 proven. 94 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-10-16 02:56:10,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:56:10,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155541459] [2021-10-16 02:56:10,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155541459] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:56:10,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816800663] [2021-10-16 02:56:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:10,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:10,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:56:10,231 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:56:10,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-16 02:56:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:10,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:56:10,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-10-16 02:56:11,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-10-16 02:56:12,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816800663] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:12,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:56:12,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 7 [2021-10-16 02:56:12,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852681806] [2021-10-16 02:56:12,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:56:12,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:56:12,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:56:12,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:56:12,504 INFO L87 Difference]: Start difference. First operand 1043 states and 1125 transitions. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:13,033 INFO L93 Difference]: Finished difference Result 1603 states and 1736 transitions. [2021-10-16 02:56:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:56:13,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2021-10-16 02:56:13,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:13,034 INFO L225 Difference]: With dead ends: 1603 [2021-10-16 02:56:13,034 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:56:13,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:56:13,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:56:13,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:56:13,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:56:13,038 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 272 [2021-10-16 02:56:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:13,065 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:56:13,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:13,066 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:56:13,066 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:56:13,070 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:56:13,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:56:13,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-16 02:56:13,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:56:13,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:56:13,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:56:13,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:56:13,952 INFO L857 garLoopResultBuilder]: For program point L499-1(lines 39 608) no Hoare annotation was computed. [2021-10-16 02:56:13,952 INFO L857 garLoopResultBuilder]: For program point L301(lines 301 423) no Hoare annotation was computed. [2021-10-16 02:56:13,952 INFO L857 garLoopResultBuilder]: For program point L235(lines 235 423) no Hoare annotation was computed. [2021-10-16 02:56:13,952 INFO L857 garLoopResultBuilder]: For program point L169(lines 169 423) no Hoare annotation was computed. [2021-10-16 02:56:13,952 INFO L857 garLoopResultBuilder]: For program point L303(lines 303 423) no Hoare annotation was computed. [2021-10-16 02:56:13,952 INFO L857 garLoopResultBuilder]: For program point L105(lines 105 423) no Hoare annotation was computed. [2021-10-16 02:56:13,953 INFO L857 garLoopResultBuilder]: For program point L502-1(lines 39 608) no Hoare annotation was computed. [2021-10-16 02:56:13,953 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 423) no Hoare annotation was computed. [2021-10-16 02:56:13,953 INFO L857 garLoopResultBuilder]: For program point L503(line 503) no Hoare annotation was computed. [2021-10-16 02:56:13,953 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 423) no Hoare annotation was computed. [2021-10-16 02:56:13,953 INFO L857 garLoopResultBuilder]: For program point L307(lines 307 423) no Hoare annotation was computed. [2021-10-16 02:56:13,953 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 423) no Hoare annotation was computed. [2021-10-16 02:56:13,953 INFO L857 garLoopResultBuilder]: For program point L109(lines 109 423) no Hoare annotation was computed. [2021-10-16 02:56:13,954 INFO L857 garLoopResultBuilder]: For program point L242(lines 242 423) no Hoare annotation was computed. [2021-10-16 02:56:13,954 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 423) no Hoare annotation was computed. [2021-10-16 02:56:13,954 INFO L857 garLoopResultBuilder]: For program point L244(lines 244 423) no Hoare annotation was computed. [2021-10-16 02:56:13,954 INFO L857 garLoopResultBuilder]: For program point L179(lines 179 423) no Hoare annotation was computed. [2021-10-16 02:56:13,954 INFO L857 garLoopResultBuilder]: For program point L378(lines 378 423) no Hoare annotation was computed. [2021-10-16 02:56:13,954 INFO L857 garLoopResultBuilder]: For program point L48(lines 48 423) no Hoare annotation was computed. [2021-10-16 02:56:13,954 INFO L857 garLoopResultBuilder]: For program point L247(lines 247 423) no Hoare annotation was computed. [2021-10-16 02:56:13,955 INFO L857 garLoopResultBuilder]: For program point L116(lines 116 423) no Hoare annotation was computed. [2021-10-16 02:56:13,955 INFO L857 garLoopResultBuilder]: For program point L52(lines 52 423) no Hoare annotation was computed. [2021-10-16 02:56:13,955 INFO L857 garLoopResultBuilder]: For program point L185(lines 185 423) no Hoare annotation was computed. [2021-10-16 02:56:13,955 INFO L857 garLoopResultBuilder]: For program point L385(lines 385 423) no Hoare annotation was computed. [2021-10-16 02:56:13,955 INFO L857 garLoopResultBuilder]: For program point L319(lines 319 423) no Hoare annotation was computed. [2021-10-16 02:56:13,955 INFO L857 garLoopResultBuilder]: For program point L189(lines 189 423) no Hoare annotation was computed. [2021-10-16 02:56:13,955 INFO L857 garLoopResultBuilder]: For program point L123(lines 123 423) no Hoare annotation was computed. [2021-10-16 02:56:13,955 INFO L857 garLoopResultBuilder]: For program point L57(lines 57 423) no Hoare annotation was computed. [2021-10-16 02:56:13,956 INFO L857 garLoopResultBuilder]: For program point L388(lines 388 423) no Hoare annotation was computed. [2021-10-16 02:56:13,956 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:56:13,956 INFO L857 garLoopResultBuilder]: For program point L390(lines 390 423) no Hoare annotation was computed. [2021-10-16 02:56:13,956 INFO L857 garLoopResultBuilder]: For program point L324(lines 324 423) no Hoare annotation was computed. [2021-10-16 02:56:13,956 INFO L857 garLoopResultBuilder]: For program point L258(lines 258 423) no Hoare annotation was computed. [2021-10-16 02:56:13,956 INFO L857 garLoopResultBuilder]: For program point L60(lines 60 423) no Hoare annotation was computed. [2021-10-16 02:56:13,956 INFO L857 garLoopResultBuilder]: For program point L195(lines 195 423) no Hoare annotation was computed. [2021-10-16 02:56:13,957 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 423) no Hoare annotation was computed. [2021-10-16 02:56:13,957 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 423) no Hoare annotation was computed. [2021-10-16 02:56:13,957 INFO L857 garLoopResultBuilder]: For program point L263(lines 263 423) no Hoare annotation was computed. [2021-10-16 02:56:13,957 INFO L857 garLoopResultBuilder]: For program point L197(lines 197 423) no Hoare annotation was computed. [2021-10-16 02:56:13,957 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 503) no Hoare annotation was computed. [2021-10-16 02:56:13,957 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 423) no Hoare annotation was computed. [2021-10-16 02:56:13,957 INFO L857 garLoopResultBuilder]: For program point L133(lines 133 423) no Hoare annotation was computed. [2021-10-16 02:56:13,958 INFO L857 garLoopResultBuilder]: For program point L399(lines 399 423) no Hoare annotation was computed. [2021-10-16 02:56:13,958 INFO L857 garLoopResultBuilder]: For program point L201(lines 201 423) no Hoare annotation was computed. [2021-10-16 02:56:13,958 INFO L857 garLoopResultBuilder]: For program point L69(lines 69 423) no Hoare annotation was computed. [2021-10-16 02:56:13,958 INFO L857 garLoopResultBuilder]: For program point L269(lines 269 423) no Hoare annotation was computed. [2021-10-16 02:56:13,958 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 423) no Hoare annotation was computed. [2021-10-16 02:56:13,958 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 423) no Hoare annotation was computed. [2021-10-16 02:56:13,958 INFO L857 garLoopResultBuilder]: For program point L404(lines 404 423) no Hoare annotation was computed. [2021-10-16 02:56:13,958 INFO L857 garLoopResultBuilder]: For program point L338(lines 338 423) no Hoare annotation was computed. [2021-10-16 02:56:13,959 INFO L857 garLoopResultBuilder]: For program point L140(lines 140 423) no Hoare annotation was computed. [2021-10-16 02:56:13,959 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 423) no Hoare annotation was computed. [2021-10-16 02:56:13,959 INFO L857 garLoopResultBuilder]: For program point L208(lines 208 423) no Hoare annotation was computed. [2021-10-16 02:56:13,959 INFO L857 garLoopResultBuilder]: For program point L341(lines 341 423) no Hoare annotation was computed. [2021-10-16 02:56:13,959 INFO L857 garLoopResultBuilder]: For program point L408(lines 408 423) no Hoare annotation was computed. [2021-10-16 02:56:13,959 INFO L857 garLoopResultBuilder]: For program point L144(lines 144 423) no Hoare annotation was computed. [2021-10-16 02:56:13,960 INFO L853 garLoopResultBuilder]: At program point L607(lines 39 608) the Hoare annotation is: (let ((.cse0 (<= 10 ~a28~0)) (.cse6 (<= ~a17~0 7)) (.cse10 (= ~a25~0 ~a11~0)) (.cse11 (<= ~a28~0 7)) (.cse9 (<= 9 ~a28~0)) (.cse1 (= ~a25~0 1)) (.cse8 (= ~a19~0 1)) (.cse2 (<= ~a17~0 8)) (.cse3 (<= ~a11~0 0)) (.cse4 (<= ~a28~0 10)) (.cse7 (= ~a25~0 0)) (.cse5 (<= ~a19~0 0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (and .cse0 .cse6 .cse4 .cse7) (and .cse0 .cse2 .cse4 .cse8) (and .cse9 .cse1 .cse6 .cse4) (and .cse1 .cse2 .cse3 .cse8) (and .cse10 .cse2 .cse8 .cse7 .cse11) (and .cse2 (or (and (= 7 ~a28~0) .cse1) (and (= ~a28~0 8) .cse7))) (and (< 7 ~a28~0) .cse2 .cse3 .cse4 .cse8 .cse7) (and .cse10 .cse1 .cse2 .cse8 .cse11) (and .cse9 .cse1 .cse2 .cse4 .cse8) (and (= ~a11~0 1) .cse2 .cse4 .cse7) (and .cse2 .cse3 .cse4 .cse7 .cse5))) [2021-10-16 02:56:13,960 INFO L857 garLoopResultBuilder]: For program point L79(lines 79 423) no Hoare annotation was computed. [2021-10-16 02:56:13,961 INFO L857 garLoopResultBuilder]: For program point L212(lines 212 423) no Hoare annotation was computed. [2021-10-16 02:56:13,962 INFO L860 garLoopResultBuilder]: At program point L610(lines 610 627) the Hoare annotation is: true [2021-10-16 02:56:13,962 INFO L857 garLoopResultBuilder]: For program point L412(lines 412 423) no Hoare annotation was computed. [2021-10-16 02:56:13,962 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 423) no Hoare annotation was computed. [2021-10-16 02:56:13,962 INFO L857 garLoopResultBuilder]: For program point L149(lines 149 423) no Hoare annotation was computed. [2021-10-16 02:56:13,963 INFO L857 garLoopResultBuilder]: For program point L414(lines 414 423) no Hoare annotation was computed. [2021-10-16 02:56:13,963 INFO L857 garLoopResultBuilder]: For program point L84(lines 84 423) no Hoare annotation was computed. [2021-10-16 02:56:13,963 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:56:13,963 INFO L857 garLoopResultBuilder]: For program point L417(lines 417 423) no Hoare annotation was computed. [2021-10-16 02:56:13,963 INFO L857 garLoopResultBuilder]: For program point L153(lines 153 423) no Hoare annotation was computed. [2021-10-16 02:56:13,964 INFO L853 garLoopResultBuilder]: At program point L616-2(lines 616 626) the Hoare annotation is: (let ((.cse0 (<= 10 ~a28~0)) (.cse6 (<= ~a17~0 7)) (.cse10 (= ~a25~0 ~a11~0)) (.cse11 (<= ~a28~0 7)) (.cse9 (<= 9 ~a28~0)) (.cse1 (= ~a25~0 1)) (.cse8 (= ~a19~0 1)) (.cse2 (<= ~a17~0 8)) (.cse3 (<= ~a11~0 0)) (.cse4 (<= ~a28~0 10)) (.cse7 (= ~a25~0 0)) (.cse5 (<= ~a19~0 0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (and .cse0 .cse6 .cse4 .cse7) (and .cse0 .cse2 .cse4 .cse8) (and .cse9 .cse1 .cse6 .cse4) (and .cse1 .cse2 .cse3 .cse8) (and .cse10 .cse2 .cse8 .cse7 .cse11) (and .cse2 (or (and (= 7 ~a28~0) .cse1) (and (= ~a28~0 8) .cse7))) (and (< 7 ~a28~0) .cse2 .cse3 .cse4 .cse8 .cse7) (and .cse10 .cse1 .cse2 .cse8 .cse11) (and .cse9 .cse1 .cse2 .cse4 .cse8) (and (= ~a11~0 1) .cse2 .cse4 .cse7) (and .cse2 .cse3 .cse4 .cse7 .cse5))) [2021-10-16 02:56:13,964 INFO L857 garLoopResultBuilder]: For program point L286(lines 286 423) no Hoare annotation was computed. [2021-10-16 02:56:13,964 INFO L857 garLoopResultBuilder]: For program point L419(lines 419 423) no Hoare annotation was computed. [2021-10-16 02:56:13,965 INFO L857 garLoopResultBuilder]: For program point L222(lines 222 423) no Hoare annotation was computed. [2021-10-16 02:56:13,965 INFO L857 garLoopResultBuilder]: For program point L290(lines 290 423) no Hoare annotation was computed. [2021-10-16 02:56:13,965 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 423) no Hoare annotation was computed. [2021-10-16 02:56:13,965 INFO L857 garLoopResultBuilder]: For program point L92(lines 92 423) no Hoare annotation was computed. [2021-10-16 02:56:13,965 INFO L857 garLoopResultBuilder]: For program point L621(line 621) no Hoare annotation was computed. [2021-10-16 02:56:13,966 INFO L857 garLoopResultBuilder]: For program point L225(lines 225 423) no Hoare annotation was computed. [2021-10-16 02:56:13,966 INFO L857 garLoopResultBuilder]: For program point L359(lines 359 423) no Hoare annotation was computed. [2021-10-16 02:56:13,966 INFO L857 garLoopResultBuilder]: For program point L293(lines 293 423) no Hoare annotation was computed. [2021-10-16 02:56:13,966 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 423) no Hoare annotation was computed. [2021-10-16 02:56:13,966 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 423) no Hoare annotation was computed. [2021-10-16 02:56:13,967 INFO L857 garLoopResultBuilder]: For program point L164(lines 164 423) no Hoare annotation was computed. [2021-10-16 02:56:13,967 INFO L857 garLoopResultBuilder]: For program point L364(lines 364 423) no Hoare annotation was computed. [2021-10-16 02:56:13,967 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 423) no Hoare annotation was computed. [2021-10-16 02:56:13,967 INFO L857 garLoopResultBuilder]: For program point L101(lines 101 423) no Hoare annotation was computed. [2021-10-16 02:56:13,973 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:56:13,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:56:13 BoogieIcfgContainer [2021-10-16 02:56:13,999 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:56:13,999 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:56:14,000 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:56:14,000 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:56:14,001 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:55:55" (3/4) ... [2021-10-16 02:56:14,005 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:56:14,035 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 114 nodes and edges [2021-10-16 02:56:14,037 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-16 02:56:14,040 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-16 02:56:14,042 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-16 02:56:14,241 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:56:14,241 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:56:14,243 INFO L168 Benchmark]: Toolchain (without parser) took 22158.47 ms. Allocated memory was 117.4 MB in the beginning and 276.8 MB in the end (delta: 159.4 MB). Free memory was 80.1 MB in the beginning and 176.5 MB in the end (delta: -96.4 MB). Peak memory consumption was 61.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:56:14,244 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 117.4 MB. Free memory was 88.4 MB in the beginning and 88.3 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:56:14,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 759.09 ms. Allocated memory is still 117.4 MB. Free memory was 80.1 MB in the beginning and 77.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:56:14,245 INFO L168 Benchmark]: Boogie Procedure Inliner took 117.51 ms. Allocated memory is still 117.4 MB. Free memory was 77.1 MB in the beginning and 71.6 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:56:14,245 INFO L168 Benchmark]: Boogie Preprocessor took 77.30 ms. Allocated memory is still 117.4 MB. Free memory was 71.6 MB in the beginning and 67.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:56:14,246 INFO L168 Benchmark]: RCFGBuilder took 2379.04 ms. Allocated memory was 117.4 MB in the beginning and 151.0 MB in the end (delta: 33.6 MB). Free memory was 67.4 MB in the beginning and 81.8 MB in the end (delta: -14.4 MB). Peak memory consumption was 44.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:56:14,246 INFO L168 Benchmark]: TraceAbstraction took 18568.44 ms. Allocated memory was 151.0 MB in the beginning and 276.8 MB in the end (delta: 125.8 MB). Free memory was 80.9 MB in the beginning and 192.2 MB in the end (delta: -111.3 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:56:14,247 INFO L168 Benchmark]: Witness Printer took 242.11 ms. Allocated memory is still 276.8 MB. Free memory was 192.2 MB in the beginning and 176.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:56:14,250 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 117.4 MB. Free memory was 88.4 MB in the beginning and 88.3 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 759.09 ms. Allocated memory is still 117.4 MB. Free memory was 80.1 MB in the beginning and 77.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 117.51 ms. Allocated memory is still 117.4 MB. Free memory was 77.1 MB in the beginning and 71.6 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 77.30 ms. Allocated memory is still 117.4 MB. Free memory was 71.6 MB in the beginning and 67.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2379.04 ms. Allocated memory was 117.4 MB in the beginning and 151.0 MB in the end (delta: 33.6 MB). Free memory was 67.4 MB in the beginning and 81.8 MB in the end (delta: -14.4 MB). Peak memory consumption was 44.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18568.44 ms. Allocated memory was 151.0 MB in the beginning and 276.8 MB in the end (delta: 125.8 MB). Free memory was 80.9 MB in the beginning and 192.2 MB in the end (delta: -111.3 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. * Witness Printer took 242.11 ms. Allocated memory is still 276.8 MB. Free memory was 192.2 MB in the beginning and 176.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 503]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 85 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 18442.5ms, OverallIterations: 16, TraceHistogramMax: 6, EmptinessCheckTime: 103.7ms, AutomataDifference: 6993.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 678.2ms, InitialAbstractionConstructionTime: 20.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1419 SDtfs, 1249 SDslu, 109 SDs, 0 SdLazy, 3938 SolverSat, 686 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4740.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1737 GetRequests, 1706 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 156.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1763occurred in iteration=6, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 623.4ms AutomataMinimizationTime, 16 MinimizatonAttempts, 400 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 375 HoareAnnotationTreeSize, 3 FomulaSimplifications, 618 FormulaSimplificationTreeSizeReduction, 67.1ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 156 FormulaSimplificationTreeSizeReductionInter, 599.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 272.6ms SsaConstructionTime, 997.8ms SatisfiabilityAnalysisTime, 6538.8ms InterpolantComputationTime, 3271 NumberOfCodeBlocks, 3271 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 4094 ConstructedInterpolants, 0 QuantifiedInterpolants, 10238 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1666 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 24 InterpolantComputations, 20 PerfectInterpolantSequences, 3982/4241 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 616]: Loop Invariant Derived loop invariant: (((((((((((((((10 <= a28 && a25 == 1) && a17 <= 8) && a11 <= 0) && a28 <= 10) && a19 <= 0) || (((10 <= a28 && a17 <= 7) && a28 <= 10) && a25 == 0)) || (((10 <= a28 && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((9 <= a28 && a25 == 1) && a17 <= 7) && a28 <= 10)) || (((a25 == 1 && a17 <= 8) && a11 <= 0) && a19 == 1)) || ((((a25 == a11 && a17 <= 8) && a19 == 1) && a25 == 0) && a28 <= 7)) || (a17 <= 8 && ((7 == a28 && a25 == 1) || (a28 == 8 && a25 == 0)))) || (((((7 < a28 && a17 <= 8) && a11 <= 0) && a28 <= 10) && a19 == 1) && a25 == 0)) || ((((a25 == a11 && a25 == 1) && a17 <= 8) && a19 == 1) && a28 <= 7)) || ((((9 <= a28 && a25 == 1) && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((a11 == 1 && a17 <= 8) && a28 <= 10) && a25 == 0)) || ((((a17 <= 8 && a11 <= 0) && a28 <= 10) && a25 == 0) && a19 <= 0) - InvariantResult [Line: 610]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (((((((((((((((10 <= a28 && a25 == 1) && a17 <= 8) && a11 <= 0) && a28 <= 10) && a19 <= 0) || (((10 <= a28 && a17 <= 7) && a28 <= 10) && a25 == 0)) || (((10 <= a28 && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((9 <= a28 && a25 == 1) && a17 <= 7) && a28 <= 10)) || (((a25 == 1 && a17 <= 8) && a11 <= 0) && a19 == 1)) || ((((a25 == a11 && a17 <= 8) && a19 == 1) && a25 == 0) && a28 <= 7)) || (a17 <= 8 && ((7 == a28 && a25 == 1) || (a28 == 8 && a25 == 0)))) || (((((7 < a28 && a17 <= 8) && a11 <= 0) && a28 <= 10) && a19 == 1) && a25 == 0)) || ((((a25 == a11 && a25 == 1) && a17 <= 8) && a19 == 1) && a28 <= 7)) || ((((9 <= a28 && a25 == 1) && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((a11 == 1 && a17 <= 8) && a28 <= 10) && a25 == 0)) || ((((a17 <= 8 && a11 <= 0) && a28 <= 10) && a25 == 0) && a19 <= 0) RESULT: Ultimate proved your program to be correct! [2021-10-16 02:56:14,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2a0b18-f6ea-4d95-bd85-cf0f810f1b83/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...