./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE --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 2464e957c33404298d60b891632e9df008614058c749595a2f9c32bf73970bbc ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:19:08,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:19:08,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:19:08,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:19:08,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:19:08,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:19:08,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:19:08,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:19:08,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:19:08,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:19:08,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:19:08,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:19:08,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:19:08,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:19:08,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:19:08,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:19:08,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:19:08,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:19:08,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:19:08,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:19:08,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:19:08,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:19:08,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:19:08,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:19:08,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:19:08,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:19:08,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:19:08,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:19:08,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:19:08,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:19:08,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:19:08,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:19:08,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:19:08,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:19:08,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:19:08,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:19:08,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:19:08,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:19:08,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:19:08,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:19:08,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:19:08,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 11:19:08,626 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:19:08,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:19:08,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:19:08,628 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:19:08,628 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:19:08,628 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:19:08,628 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 11:19:08,635 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:19:08,641 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:19:08,641 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 11:19:08,642 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 11:19:08,642 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:19:08,642 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 11:19:08,642 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 11:19:08,642 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 11:19:08,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:19:08,643 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:19:08,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:19:08,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:19:08,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:19:08,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:19:08,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:19:08,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:19:08,645 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:19:08,645 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:19:08,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:19:08,645 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:19:08,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:19:08,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:19:08,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:19:08,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:19:08,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:19:08,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:19:08,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:19:08,647 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 11:19:08,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 11:19:08,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:19:08,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:19:08,648 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:19:08,648 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_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2464e957c33404298d60b891632e9df008614058c749595a2f9c32bf73970bbc [2021-10-24 11:19:08,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:19:08,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:19:08,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:19:08,961 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:19:08,962 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:19:08,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/eca-rers2012/Problem01_label16.c [2021-10-24 11:19:09,045 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/data/cd31eeea6/84519f63aa6a4f62a361f054565e5a9f/FLAG1342832df [2021-10-24 11:19:09,700 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:19:09,705 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/sv-benchmarks/c/eca-rers2012/Problem01_label16.c [2021-10-24 11:19:09,720 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/data/cd31eeea6/84519f63aa6a4f62a361f054565e5a9f/FLAG1342832df [2021-10-24 11:19:09,950 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/data/cd31eeea6/84519f63aa6a4f62a361f054565e5a9f [2021-10-24 11:19:09,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:19:09,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:19:09,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:19:09,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:19:09,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:19:09,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:19:09" (1/1) ... [2021-10-24 11:19:09,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c050bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:09, skipping insertion in model container [2021-10-24 11:19:09,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:19:09" (1/1) ... [2021-10-24 11:19:09,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:19:10,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:19:10,418 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_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/sv-benchmarks/c/eca-rers2012/Problem01_label16.c[21710,21723] [2021-10-24 11:19:10,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:19:10,443 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:19:10,606 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_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/sv-benchmarks/c/eca-rers2012/Problem01_label16.c[21710,21723] [2021-10-24 11:19:10,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:19:10,644 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:19:10,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:10 WrapperNode [2021-10-24 11:19:10,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:19:10,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:19:10,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:19:10,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:19:10,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:10" (1/1) ... [2021-10-24 11:19:10,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:10" (1/1) ... [2021-10-24 11:19:10,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:19:10,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:19:10,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:19:10,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:19:10,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:10" (1/1) ... [2021-10-24 11:19:10,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:10" (1/1) ... [2021-10-24 11:19:10,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:10" (1/1) ... [2021-10-24 11:19:10,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:10" (1/1) ... [2021-10-24 11:19:10,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:10" (1/1) ... [2021-10-24 11:19:10,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:10" (1/1) ... [2021-10-24 11:19:10,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:10" (1/1) ... [2021-10-24 11:19:10,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:19:10,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:19:10,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:19:10,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:19:10,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:10" (1/1) ... [2021-10-24 11:19:10,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:19:10,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:19:10,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:19:10,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:19:10,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 11:19:10,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:19:10,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:19:10,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:19:12,724 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:19:12,724 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-24 11:19:12,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:19:12 BoogieIcfgContainer [2021-10-24 11:19:12,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:19:12,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:19:12,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:19:12,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:19:12,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:19:09" (1/3) ... [2021-10-24 11:19:12,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c36965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:19:12, skipping insertion in model container [2021-10-24 11:19:12,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:19:10" (2/3) ... [2021-10-24 11:19:12,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c36965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:19:12, skipping insertion in model container [2021-10-24 11:19:12,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:19:12" (3/3) ... [2021-10-24 11:19:12,737 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label16.c [2021-10-24 11:19:12,743 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:19:12,743 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 11:19:12,795 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:19:12,801 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 11:19:12,802 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 11:19:12,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 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) [2021-10-24 11:19:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-24 11:19:12,827 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:19:12,828 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] [2021-10-24 11:19:12,829 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:19:12,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:19:12,835 INFO L82 PathProgramCache]: Analyzing trace with hash 379029639, now seen corresponding path program 1 times [2021-10-24 11:19:12,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:19:12,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018305900] [2021-10-24 11:19:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:19:12,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:19:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:19:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:19:13,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:19:13,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018305900] [2021-10-24 11:19:13,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018305900] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:19:13,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:19:13,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 11:19:13,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556929578] [2021-10-24 11:19:13,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:19:13,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:19:13,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:19:13,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:19:13,459 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 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) Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-10-24 11:19:14,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:19:14,259 INFO L93 Difference]: Finished difference Result 297 states and 569 transitions. [2021-10-24 11:19:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:19:14,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2021-10-24 11:19:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:19:14,281 INFO L225 Difference]: With dead ends: 297 [2021-10-24 11:19:14,281 INFO L226 Difference]: Without dead ends: 216 [2021-10-24 11:19:14,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:19:14,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-10-24 11:19:14,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-10-24 11:19:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5627906976744186) internal successors, (336), 215 states have internal predecessors, (336), 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) [2021-10-24 11:19:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 336 transitions. [2021-10-24 11:19:14,363 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 336 transitions. Word has length 71 [2021-10-24 11:19:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:19:14,365 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 336 transitions. [2021-10-24 11:19:14,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-10-24 11:19:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 336 transitions. [2021-10-24 11:19:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-24 11:19:14,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:19:14,376 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:19:14,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 11:19:14,377 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:19:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:19:14,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1583649670, now seen corresponding path program 1 times [2021-10-24 11:19:14,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:19:14,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797462798] [2021-10-24 11:19:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:19:14,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:19:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:19:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:19:14,675 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:19:14,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797462798] [2021-10-24 11:19:14,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797462798] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:19:14,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:19:14,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 11:19:14,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964580291] [2021-10-24 11:19:14,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:19:14,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:19:14,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:19:14,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:19:14,681 INFO L87 Difference]: Start difference. First operand 216 states and 336 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-10-24 11:19:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:19:15,258 INFO L93 Difference]: Finished difference Result 500 states and 848 transitions. [2021-10-24 11:19:15,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:19:15,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2021-10-24 11:19:15,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:19:15,262 INFO L225 Difference]: With dead ends: 500 [2021-10-24 11:19:15,262 INFO L226 Difference]: Without dead ends: 287 [2021-10-24 11:19:15,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:19:15,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-24 11:19:15,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 216. [2021-10-24 11:19:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.3627906976744186) internal successors, (293), 215 states have internal predecessors, (293), 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) [2021-10-24 11:19:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 293 transitions. [2021-10-24 11:19:15,290 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 293 transitions. Word has length 78 [2021-10-24 11:19:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:19:15,293 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 293 transitions. [2021-10-24 11:19:15,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-10-24 11:19:15,294 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 293 transitions. [2021-10-24 11:19:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-24 11:19:15,295 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:19:15,296 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2021-10-24 11:19:15,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 11:19:15,296 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:19:15,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:19:15,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2090514760, now seen corresponding path program 1 times [2021-10-24 11:19:15,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:19:15,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309330220] [2021-10-24 11:19:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:19:15,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:19:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:19:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 11:19:15,391 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:19:15,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309330220] [2021-10-24 11:19:15,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309330220] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:19:15,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:19:15,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 11:19:15,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658182374] [2021-10-24 11:19:15,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:19:15,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:19:15,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:19:15,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:19:15,403 INFO L87 Difference]: Start difference. First operand 216 states and 293 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) [2021-10-24 11:19:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:19:15,668 INFO L93 Difference]: Finished difference Result 502 states and 684 transitions. [2021-10-24 11:19:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:19:15,669 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 86 [2021-10-24 11:19:15,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:19:15,671 INFO L225 Difference]: With dead ends: 502 [2021-10-24 11:19:15,671 INFO L226 Difference]: Without dead ends: 287 [2021-10-24 11:19:15,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:19:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-24 11:19:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-24 11:19:15,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.3146853146853146) internal successors, (376), 286 states have internal predecessors, (376), 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) [2021-10-24 11:19:15,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 376 transitions. [2021-10-24 11:19:15,706 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 376 transitions. Word has length 86 [2021-10-24 11:19:15,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:19:15,707 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 376 transitions. [2021-10-24 11:19:15,707 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) [2021-10-24 11:19:15,707 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 376 transitions. [2021-10-24 11:19:15,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-24 11:19:15,709 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:19:15,710 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:19:15,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 11:19:15,711 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:19:15,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:19:15,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1999063622, now seen corresponding path program 1 times [2021-10-24 11:19:15,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:19:15,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580737329] [2021-10-24 11:19:15,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:19:15,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:19:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:19:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-24 11:19:15,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:19:15,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580737329] [2021-10-24 11:19:15,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580737329] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:19:15,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:19:15,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 11:19:15,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339166898] [2021-10-24 11:19:15,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:19:15,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:19:15,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:19:15,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:19:15,808 INFO L87 Difference]: Start difference. First operand 287 states and 376 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-10-24 11:19:16,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:19:16,158 INFO L93 Difference]: Finished difference Result 857 states and 1125 transitions. [2021-10-24 11:19:16,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:19:16,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 95 [2021-10-24 11:19:16,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:19:16,163 INFO L225 Difference]: With dead ends: 857 [2021-10-24 11:19:16,163 INFO L226 Difference]: Without dead ends: 571 [2021-10-24 11:19:16,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:19:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-10-24 11:19:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 500. [2021-10-24 11:19:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.346693386773547) internal successors, (672), 499 states have internal predecessors, (672), 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) [2021-10-24 11:19:16,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 672 transitions. [2021-10-24 11:19:16,200 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 672 transitions. Word has length 95 [2021-10-24 11:19:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:19:16,201 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 672 transitions. [2021-10-24 11:19:16,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-10-24 11:19:16,201 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 672 transitions. [2021-10-24 11:19:16,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-10-24 11:19:16,203 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:19:16,204 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-10-24 11:19:16,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 11:19:16,204 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:19:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:19:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash -7144390, now seen corresponding path program 1 times [2021-10-24 11:19:16,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:19:16,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098099428] [2021-10-24 11:19:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:19:16,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:19:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:19:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-24 11:19:16,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:19:16,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098099428] [2021-10-24 11:19:16,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098099428] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:19:16,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:19:16,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 11:19:16,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57003188] [2021-10-24 11:19:16,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:19:16,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:19:16,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:19:16,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:19:16,290 INFO L87 Difference]: Start difference. First operand 500 states and 672 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2021-10-24 11:19:16,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:19:16,614 INFO L93 Difference]: Finished difference Result 1141 states and 1516 transitions. [2021-10-24 11:19:16,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:19:16,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 120 [2021-10-24 11:19:16,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:19:16,618 INFO L225 Difference]: With dead ends: 1141 [2021-10-24 11:19:16,618 INFO L226 Difference]: Without dead ends: 642 [2021-10-24 11:19:16,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:19:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-10-24 11:19:16,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 571. [2021-10-24 11:19:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.268421052631579) internal successors, (723), 570 states have internal predecessors, (723), 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) [2021-10-24 11:19:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 723 transitions. [2021-10-24 11:19:16,635 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 723 transitions. Word has length 120 [2021-10-24 11:19:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:19:16,635 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 723 transitions. [2021-10-24 11:19:16,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2021-10-24 11:19:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 723 transitions. [2021-10-24 11:19:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-10-24 11:19:16,638 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:19:16,638 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:19:16,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-24 11:19:16,638 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:19:16,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:19:16,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1720309655, now seen corresponding path program 1 times [2021-10-24 11:19:16,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:19:16,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832831360] [2021-10-24 11:19:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:19:16,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:19:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:19:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-24 11:19:16,711 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:19:16,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832831360] [2021-10-24 11:19:16,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832831360] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:19:16,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:19:16,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 11:19:16,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843335387] [2021-10-24 11:19:16,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:19:16,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:19:16,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:19:16,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:19:16,713 INFO L87 Difference]: Start difference. First operand 571 states and 723 transitions. Second operand has 4 states, 4 states have (on average 28.5) 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) [2021-10-24 11:19:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:19:17,170 INFO L93 Difference]: Finished difference Result 1496 states and 1931 transitions. [2021-10-24 11:19:17,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:19:17,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) 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 134 [2021-10-24 11:19:17,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:19:17,176 INFO L225 Difference]: With dead ends: 1496 [2021-10-24 11:19:17,176 INFO L226 Difference]: Without dead ends: 855 [2021-10-24 11:19:17,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:19:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-24 11:19:17,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 713. [2021-10-24 11:19:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.226123595505618) internal successors, (873), 712 states have internal predecessors, (873), 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) [2021-10-24 11:19:17,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 873 transitions. [2021-10-24 11:19:17,200 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 873 transitions. Word has length 134 [2021-10-24 11:19:17,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:19:17,201 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 873 transitions. [2021-10-24 11:19:17,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) 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) [2021-10-24 11:19:17,201 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 873 transitions. [2021-10-24 11:19:17,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-10-24 11:19:17,204 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:19:17,205 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:19:17,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-24 11:19:17,205 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:19:17,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:19:17,206 INFO L82 PathProgramCache]: Analyzing trace with hash -557556547, now seen corresponding path program 1 times [2021-10-24 11:19:17,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:19:17,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190107393] [2021-10-24 11:19:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:19:17,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:19:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:19:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-24 11:19:17,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:19:17,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190107393] [2021-10-24 11:19:17,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190107393] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:19:17,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:19:17,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 11:19:17,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123424067] [2021-10-24 11:19:17,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:19:17,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:19:17,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:19:17,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:19:17,278 INFO L87 Difference]: Start difference. First operand 713 states and 873 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2021-10-24 11:19:17,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:19:17,570 INFO L93 Difference]: Finished difference Result 1567 states and 1956 transitions. [2021-10-24 11:19:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:19:17,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 137 [2021-10-24 11:19:17,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:19:17,582 INFO L225 Difference]: With dead ends: 1567 [2021-10-24 11:19:17,582 INFO L226 Difference]: Without dead ends: 855 [2021-10-24 11:19:17,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:19:17,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-24 11:19:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 784. [2021-10-24 11:19:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.236270753512133) internal successors, (968), 783 states have internal predecessors, (968), 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) [2021-10-24 11:19:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 968 transitions. [2021-10-24 11:19:17,607 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 968 transitions. Word has length 137 [2021-10-24 11:19:17,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:19:17,607 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 968 transitions. [2021-10-24 11:19:17,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2021-10-24 11:19:17,608 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 968 transitions. [2021-10-24 11:19:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-24 11:19:17,611 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:19:17,611 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:19:17,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-24 11:19:17,613 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:19:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:19:17,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1957785478, now seen corresponding path program 1 times [2021-10-24 11:19:17,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:19:17,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941142531] [2021-10-24 11:19:17,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:19:17,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:19:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:19:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-24 11:19:17,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:19:17,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941142531] [2021-10-24 11:19:17,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941142531] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:19:17,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:19:17,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 11:19:17,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129465494] [2021-10-24 11:19:17,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:19:17,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:19:17,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:19:17,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:19:17,740 INFO L87 Difference]: Start difference. First operand 784 states and 968 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2021-10-24 11:19:18,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:19:18,153 INFO L93 Difference]: Finished difference Result 1851 states and 2281 transitions. [2021-10-24 11:19:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:19:18,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 151 [2021-10-24 11:19:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:19:18,160 INFO L225 Difference]: With dead ends: 1851 [2021-10-24 11:19:18,160 INFO L226 Difference]: Without dead ends: 1068 [2021-10-24 11:19:18,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:19:18,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-10-24 11:19:18,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 926. [2021-10-24 11:19:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.2205405405405405) internal successors, (1129), 925 states have internal predecessors, (1129), 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) [2021-10-24 11:19:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1129 transitions. [2021-10-24 11:19:18,207 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1129 transitions. Word has length 151 [2021-10-24 11:19:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:19:18,208 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1129 transitions. [2021-10-24 11:19:18,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2021-10-24 11:19:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1129 transitions. [2021-10-24 11:19:18,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-10-24 11:19:18,212 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:19:18,213 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 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] [2021-10-24 11:19:18,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-24 11:19:18,213 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:19:18,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:19:18,214 INFO L82 PathProgramCache]: Analyzing trace with hash -185861949, now seen corresponding path program 1 times [2021-10-24 11:19:18,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:19:18,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962051723] [2021-10-24 11:19:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:19:18,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:19:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:19:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-10-24 11:19:18,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:19:18,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962051723] [2021-10-24 11:19:18,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962051723] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:19:18,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:19:18,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 11:19:18,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348720140] [2021-10-24 11:19:18,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:19:18,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:19:18,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:19:18,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:19:18,342 INFO L87 Difference]: Start difference. First operand 926 states and 1129 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2021-10-24 11:19:18,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:19:18,597 INFO L93 Difference]: Finished difference Result 1922 states and 2371 transitions. [2021-10-24 11:19:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:19:18,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 216 [2021-10-24 11:19:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:19:18,603 INFO L225 Difference]: With dead ends: 1922 [2021-10-24 11:19:18,603 INFO L226 Difference]: Without dead ends: 997 [2021-10-24 11:19:18,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:19:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-24 11:19:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-10-24 11:19:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.213855421686747) internal successors, (1209), 996 states have internal predecessors, (1209), 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) [2021-10-24 11:19:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1209 transitions. [2021-10-24 11:19:18,635 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1209 transitions. Word has length 216 [2021-10-24 11:19:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:19:18,635 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1209 transitions. [2021-10-24 11:19:18,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2021-10-24 11:19:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1209 transitions. [2021-10-24 11:19:18,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-10-24 11:19:18,640 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:19:18,640 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:19:18,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-24 11:19:18,641 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:19:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:19:18,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1896313743, now seen corresponding path program 1 times [2021-10-24 11:19:18,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:19:18,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767001681] [2021-10-24 11:19:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:19:18,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:19:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:19:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-10-24 11:19:18,828 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:19:18,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767001681] [2021-10-24 11:19:18,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767001681] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:19:18,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:19:18,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 11:19:18,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093864263] [2021-10-24 11:19:18,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:19:18,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:19:18,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:19:18,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:19:18,830 INFO L87 Difference]: Start difference. First operand 997 states and 1209 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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) [2021-10-24 11:19:19,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:19:19,260 INFO L93 Difference]: Finished difference Result 1993 states and 2417 transitions. [2021-10-24 11:19:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:19:19,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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 241 [2021-10-24 11:19:19,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:19:19,266 INFO L225 Difference]: With dead ends: 1993 [2021-10-24 11:19:19,266 INFO L226 Difference]: Without dead ends: 997 [2021-10-24 11:19:19,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:19:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-24 11:19:19,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-10-24 11:19:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.1646586345381527) internal successors, (1160), 996 states have internal predecessors, (1160), 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) [2021-10-24 11:19:19,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1160 transitions. [2021-10-24 11:19:19,299 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1160 transitions. Word has length 241 [2021-10-24 11:19:19,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:19:19,300 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1160 transitions. [2021-10-24 11:19:19,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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) [2021-10-24 11:19:19,300 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1160 transitions. [2021-10-24 11:19:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-10-24 11:19:19,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:19:19,305 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-10-24 11:19:19,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-24 11:19:19,306 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:19:19,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:19:19,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1092801793, now seen corresponding path program 1 times [2021-10-24 11:19:19,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:19:19,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840076188] [2021-10-24 11:19:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:19:19,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:19:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:19:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 291 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-10-24 11:19:19,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:19:19,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840076188] [2021-10-24 11:19:19,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840076188] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:19:19,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:19:19,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 11:19:19,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461826483] [2021-10-24 11:19:19,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:19:19,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:19:19,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:19:19,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:19:19,484 INFO L87 Difference]: Start difference. First operand 997 states and 1160 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2021-10-24 11:19:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:19:19,736 INFO L93 Difference]: Finished difference Result 2204 states and 2543 transitions. [2021-10-24 11:19:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:19:19,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 261 [2021-10-24 11:19:19,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:19:19,738 INFO L225 Difference]: With dead ends: 2204 [2021-10-24 11:19:19,738 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 11:19:19,740 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 [2021-10-24 11:19:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 11:19:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 11:19:19,741 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) [2021-10-24 11:19:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 11:19:19,741 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 261 [2021-10-24 11:19:19,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:19:19,741 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 11:19:19,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2021-10-24 11:19:19,742 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 11:19:19,742 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 11:19:19,744 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:19:19,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-24 11:19:19,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-24 11:19:19,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:19:19,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:19:19,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:19:19,948 INFO L857 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-24 11:19:19,948 INFO L857 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-24 11:19:19,948 INFO L857 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-24 11:19:19,948 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-24 11:19:19,948 INFO L857 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-24 11:19:19,949 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-24 11:19:19,949 INFO L857 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-24 11:19:19,949 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-24 11:19:19,949 INFO L857 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-24 11:19:19,949 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-24 11:19:19,949 INFO L857 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-24 11:19:19,949 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-24 11:19:19,949 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-24 11:19:19,950 INFO L857 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-24 11:19:19,950 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-24 11:19:19,950 INFO L857 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-24 11:19:19,950 INFO L857 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-24 11:19:19,950 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-24 11:19:19,950 INFO L857 garLoopResultBuilder]: For program point L572-1(lines 40 585) no Hoare annotation was computed. [2021-10-24 11:19:19,950 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-24 11:19:19,950 INFO L857 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-24 11:19:19,951 INFO L857 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-24 11:19:19,951 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-24 11:19:19,951 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-24 11:19:19,951 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-24 11:19:19,951 INFO L857 garLoopResultBuilder]: For program point L575-1(lines 40 585) no Hoare annotation was computed. [2021-10-24 11:19:19,951 INFO L857 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-24 11:19:19,951 INFO L857 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-24 11:19:19,951 INFO L857 garLoopResultBuilder]: For program point L576(line 576) no Hoare annotation was computed. [2021-10-24 11:19:19,951 INFO L857 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-24 11:19:19,952 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-24 11:19:19,952 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-24 11:19:19,952 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-24 11:19:19,952 INFO L857 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-24 11:19:19,952 INFO L857 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-24 11:19:19,952 INFO L857 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-24 11:19:19,952 INFO L857 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-24 11:19:19,952 INFO L857 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-24 11:19:19,952 INFO L857 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-24 11:19:19,953 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-24 11:19:19,953 INFO L857 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-24 11:19:19,953 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-24 11:19:19,953 INFO L857 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-24 11:19:19,953 INFO L853 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (= ~a21~0 1)) (.cse3 (= ~a20~0 1)) (.cse1 (<= ~a16~0 5)) (.cse2 (<= ~a8~0 13))) (or (and .cse0 .cse1) (and .cse2 (<= 6 ~a16~0) .cse3) (and (not (= ~a7~0 1)) .cse0) (and .cse2 (= ~a17~0 1) .cse1) (and (not .cse3) .cse2 .cse1) (and .cse2 (<= ~a16~0 4)))) [2021-10-24 11:19:19,953 INFO L857 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-24 11:19:19,954 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-24 11:19:19,954 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-24 11:19:19,954 INFO L857 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-24 11:19:19,954 INFO L857 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-24 11:19:19,954 INFO L857 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-24 11:19:19,954 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-24 11:19:19,954 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-24 11:19:19,954 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-24 11:19:19,954 INFO L860 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-24 11:19:19,955 INFO L857 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-24 11:19:19,955 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-24 11:19:19,955 INFO L857 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-24 11:19:19,955 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-24 11:19:19,955 INFO L857 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-24 11:19:19,955 INFO L857 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-24 11:19:19,955 INFO L857 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-24 11:19:19,955 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-24 11:19:19,955 INFO L857 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-24 11:19:19,956 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-24 11:19:19,956 INFO L857 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-24 11:19:19,956 INFO L857 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-24 11:19:19,956 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-24 11:19:19,956 INFO L853 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (= ~a21~0 1)) (.cse3 (= ~a20~0 1)) (.cse1 (<= ~a16~0 5)) (.cse2 (<= ~a8~0 13))) (or (and .cse0 .cse1) (and .cse2 (<= 6 ~a16~0) .cse3) (and (not (= ~a7~0 1)) .cse0) (and .cse2 (= ~a17~0 1) .cse1) (and (not .cse3) .cse2 .cse1) (and .cse2 (<= ~a16~0 4)))) [2021-10-24 11:19:19,956 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-24 11:19:19,956 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 576) no Hoare annotation was computed. [2021-10-24 11:19:19,956 INFO L857 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-24 11:19:19,957 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-24 11:19:19,957 INFO L857 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-24 11:19:19,957 INFO L857 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-24 11:19:19,957 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-24 11:19:19,958 INFO L857 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-24 11:19:19,962 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:19:19,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:19:19 BoogieIcfgContainer [2021-10-24 11:19:19,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:19:19,978 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:19:19,978 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:19:19,978 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:19:19,978 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:19:12" (3/4) ... [2021-10-24 11:19:19,981 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 11:19:20,001 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 107 nodes and edges [2021-10-24 11:19:20,003 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-24 11:19:20,004 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-24 11:19:20,006 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 11:19:20,118 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 11:19:20,118 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:19:20,120 INFO L168 Benchmark]: Toolchain (without parser) took 10165.21 ms. Allocated memory was 117.4 MB in the beginning and 209.7 MB in the end (delta: 92.3 MB). Free memory was 74.4 MB in the beginning and 61.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 104.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:20,120 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 117.4 MB. Free memory was 92.5 MB in the beginning and 92.4 MB in the end (delta: 47.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:19:20,120 INFO L168 Benchmark]: CACSL2BoogieTranslator took 676.54 ms. Allocated memory is still 117.4 MB. Free memory was 74.2 MB in the beginning and 75.8 MB in the end (delta: -1.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:20,121 INFO L168 Benchmark]: Boogie Procedure Inliner took 99.87 ms. Allocated memory is still 117.4 MB. Free memory was 75.8 MB in the beginning and 69.8 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:20,121 INFO L168 Benchmark]: Boogie Preprocessor took 77.97 ms. Allocated memory is still 117.4 MB. Free memory was 69.8 MB in the beginning and 65.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:20,121 INFO L168 Benchmark]: RCFGBuilder took 1901.97 ms. Allocated memory was 117.4 MB in the beginning and 161.5 MB in the end (delta: 44.0 MB). Free memory was 65.6 MB in the beginning and 98.0 MB in the end (delta: -32.4 MB). Peak memory consumption was 38.5 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:20,122 INFO L168 Benchmark]: TraceAbstraction took 7248.02 ms. Allocated memory was 161.5 MB in the beginning and 209.7 MB in the end (delta: 48.2 MB). Free memory was 98.0 MB in the beginning and 76.1 MB in the end (delta: 21.9 MB). Peak memory consumption was 69.8 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:20,122 INFO L168 Benchmark]: Witness Printer took 140.70 ms. Allocated memory is still 209.7 MB. Free memory was 76.1 MB in the beginning and 61.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 11:19:20,124 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 117.4 MB. Free memory was 92.5 MB in the beginning and 92.4 MB in the end (delta: 47.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 676.54 ms. Allocated memory is still 117.4 MB. Free memory was 74.2 MB in the beginning and 75.8 MB in the end (delta: -1.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 99.87 ms. Allocated memory is still 117.4 MB. Free memory was 75.8 MB in the beginning and 69.8 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 77.97 ms. Allocated memory is still 117.4 MB. Free memory was 69.8 MB in the beginning and 65.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1901.97 ms. Allocated memory was 117.4 MB in the beginning and 161.5 MB in the end (delta: 44.0 MB). Free memory was 65.6 MB in the beginning and 98.0 MB in the end (delta: -32.4 MB). Peak memory consumption was 38.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7248.02 ms. Allocated memory was 161.5 MB in the beginning and 209.7 MB in the end (delta: 48.2 MB). Free memory was 98.0 MB in the beginning and 76.1 MB in the end (delta: 21.9 MB). Peak memory consumption was 69.8 MB. Max. memory is 16.1 GB. * Witness Printer took 140.70 ms. Allocated memory is still 209.7 MB. Free memory was 76.1 MB in the beginning and 61.4 MB in the end (delta: 14.7 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: 576]: 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, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7169.0ms, OverallIterations: 11, TraceHistogramMax: 7, EmptinessCheckTime: 50.1ms, AutomataDifference: 4549.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 202.7ms, InitialAbstractionConstructionTime: 12.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 529 SDtfs, 882 SDslu, 65 SDs, 0 SdLazy, 2986 SolverSat, 644 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3130.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=997occurred in iteration=9, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 313.0ms AutomataMinimizationTime, 11 MinimizatonAttempts, 568 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 44 NumberOfFragments, 109 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2820 FormulaSimplificationTreeSizeReduction, 62.5ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 116 FormulaSimplificationTreeSizeReductionInter, 132.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 123.1ms SsaConstructionTime, 374.9ms SatisfiabilityAnalysisTime, 1257.8ms InterpolantComputationTime, 1590 NumberOfCodeBlocks, 1590 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 1579 ConstructedInterpolants, 0 QuantifiedInterpolants, 5406 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 1679/1679 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: 593]: Loop Invariant Derived loop invariant: (((((a21 == 1 && a16 <= 5) || ((a8 <= 13 && 6 <= a16) && a20 == 1)) || (!(a7 == 1) && a21 == 1)) || ((a8 <= 13 && a17 == 1) && a16 <= 5)) || ((!(a20 == 1) && a8 <= 13) && a16 <= 5)) || (a8 <= 13 && a16 <= 4) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((a21 == 1 && a16 <= 5) || ((a8 <= 13 && 6 <= a16) && a20 == 1)) || (!(a7 == 1) && a21 == 1)) || ((a8 <= 13 && a17 == 1) && a16 <= 5)) || ((!(a20 == 1) && a8 <= 13) && a16 <= 5)) || (a8 <= 13 && a16 <= 4) RESULT: Ultimate proved your program to be correct! [2021-10-24 11:19:20,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8debd34c-11ac-475d-b1a5-eeb0e1c35cb8/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...