./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_15-2.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_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/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_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_15-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/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_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/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 ad13fcacd201ae20f6800b42387b8ec1153fb1bf63cee7a12ec23f4a302be7c7 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:37:35,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:37:35,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:37:35,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:37:35,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:37:35,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:37:35,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:37:35,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:37:35,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:37:35,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:37:35,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:37:35,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:37:35,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:37:35,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:37:35,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:37:35,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:37:35,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:37:35,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:37:35,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:37:35,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:37:35,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:37:35,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:37:35,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:37:35,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:37:35,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:37:35,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:37:35,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:37:35,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:37:35,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:37:35,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:37:35,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:37:35,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:37:35,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:37:35,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:37:35,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:37:35,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:37:35,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:37:35,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:37:35,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:37:35,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:37:35,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:37:35,683 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:37:35,733 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:37:35,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:37:35,735 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:37:35,736 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:37:35,736 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:37:35,736 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:37:35,736 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:37:35,737 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:37:35,744 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:37:35,744 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:37:35,746 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:37:35,746 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:37:35,746 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:37:35,747 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:37:35,747 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:37:35,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:37:35,748 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:37:35,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:37:35,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:37:35,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:37:35,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:37:35,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:37:35,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:37:35,750 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:37:35,750 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:37:35,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:37:35,751 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:37:35,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:37:35,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:37:35,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:37:35,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:37:35,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:37:35,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:37:35,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:37:35,753 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:37:35,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:37:35,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:37:35,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:37:35,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:37:35,755 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_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad13fcacd201ae20f6800b42387b8ec1153fb1bf63cee7a12ec23f4a302be7c7 [2021-10-24 10:37:36,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:37:36,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:37:36,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:37:36,183 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:37:36,184 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:37:36,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/locks/test_locks_15-2.c [2021-10-24 10:37:36,273 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/bin/utaipan-9zjyvhn0QE/data/9ef4ff701/e58adc0235f6446480ec52fde691c031/FLAG46e303444 [2021-10-24 10:37:36,885 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:37:36,887 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/sv-benchmarks/c/locks/test_locks_15-2.c [2021-10-24 10:37:36,906 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/bin/utaipan-9zjyvhn0QE/data/9ef4ff701/e58adc0235f6446480ec52fde691c031/FLAG46e303444 [2021-10-24 10:37:37,186 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/bin/utaipan-9zjyvhn0QE/data/9ef4ff701/e58adc0235f6446480ec52fde691c031 [2021-10-24 10:37:37,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:37:37,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:37:37,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:37:37,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:37:37,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:37:37,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:37:37" (1/1) ... [2021-10-24 10:37:37,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17c23f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:37, skipping insertion in model container [2021-10-24 10:37:37,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:37:37" (1/1) ... [2021-10-24 10:37:37,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:37:37,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:37:37,467 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_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/sv-benchmarks/c/locks/test_locks_15-2.c[5628,5641] [2021-10-24 10:37:37,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:37:37,482 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:37:37,523 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_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/sv-benchmarks/c/locks/test_locks_15-2.c[5628,5641] [2021-10-24 10:37:37,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:37:37,541 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:37:37,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:37 WrapperNode [2021-10-24 10:37:37,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:37:37,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:37:37,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:37:37,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:37:37,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:37" (1/1) ... [2021-10-24 10:37:37,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:37" (1/1) ... [2021-10-24 10:37:37,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:37:37,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:37:37,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:37:37,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:37:37,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:37" (1/1) ... [2021-10-24 10:37:37,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:37" (1/1) ... [2021-10-24 10:37:37,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:37" (1/1) ... [2021-10-24 10:37:37,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:37" (1/1) ... [2021-10-24 10:37:37,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:37" (1/1) ... [2021-10-24 10:37:37,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:37" (1/1) ... [2021-10-24 10:37:37,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:37" (1/1) ... [2021-10-24 10:37:37,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:37:37,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:37:37,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:37:37,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:37:37,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:37" (1/1) ... [2021-10-24 10:37:37,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:37:37,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:37:37,711 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:37:37,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:37:37,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:37:37,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:37:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:37:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:37:38,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:37:38,657 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-24 10:37:38,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:37:38 BoogieIcfgContainer [2021-10-24 10:37:38,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:37:38,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:37:38,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:37:38,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:37:38,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:37:37" (1/3) ... [2021-10-24 10:37:38,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2c329a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:37:38, skipping insertion in model container [2021-10-24 10:37:38,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:37" (2/3) ... [2021-10-24 10:37:38,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2c329a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:37:38, skipping insertion in model container [2021-10-24 10:37:38,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:37:38" (3/3) ... [2021-10-24 10:37:38,671 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_15-2.c [2021-10-24 10:37:38,681 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:37:38,682 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:37:38,753 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:37:38,763 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 10:37:38,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 10:37:38,782 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 37 states have internal predecessors, (69), 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 10:37:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 10:37:38,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:38,789 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 10:37:38,790 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:38,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:38,799 INFO L82 PathProgramCache]: Analyzing trace with hash 390611274, now seen corresponding path program 1 times [2021-10-24 10:37:38,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:38,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506642775] [2021-10-24 10:37:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:38,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:39,252 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 10:37:39,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:39,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506642775] [2021-10-24 10:37:39,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506642775] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:39,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:39,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:39,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701712753] [2021-10-24 10:37:39,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:39,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:39,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:39,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:39,290 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 37 states have internal predecessors, (69), 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 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 10:37:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:39,387 INFO L93 Difference]: Finished difference Result 78 states and 137 transitions. [2021-10-24 10:37:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:39,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-10-24 10:37:39,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:39,405 INFO L225 Difference]: With dead ends: 78 [2021-10-24 10:37:39,406 INFO L226 Difference]: Without dead ends: 67 [2021-10-24 10:37:39,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:39,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-24 10:37:39,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 35. [2021-10-24 10:37:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 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 10:37:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 63 transitions. [2021-10-24 10:37:39,461 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 63 transitions. Word has length 6 [2021-10-24 10:37:39,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:39,462 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 63 transitions. [2021-10-24 10:37:39,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 10:37:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 63 transitions. [2021-10-24 10:37:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-24 10:37:39,463 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:39,463 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:39,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:37:39,464 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:39,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:39,465 INFO L82 PathProgramCache]: Analyzing trace with hash -775740666, now seen corresponding path program 1 times [2021-10-24 10:37:39,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:39,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525102784] [2021-10-24 10:37:39,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:39,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:39,540 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 10:37:39,540 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:39,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525102784] [2021-10-24 10:37:39,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525102784] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:39,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:39,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:39,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279089209] [2021-10-24 10:37:39,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:39,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:39,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:39,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:39,545 INFO L87 Difference]: Start difference. First operand 35 states and 63 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 10:37:39,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:39,574 INFO L93 Difference]: Finished difference Result 67 states and 119 transitions. [2021-10-24 10:37:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:39,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-10-24 10:37:39,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:39,577 INFO L225 Difference]: With dead ends: 67 [2021-10-24 10:37:39,577 INFO L226 Difference]: Without dead ends: 65 [2021-10-24 10:37:39,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:39,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-24 10:37:39,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 35. [2021-10-24 10:37:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 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 10:37:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 62 transitions. [2021-10-24 10:37:39,597 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 62 transitions. Word has length 7 [2021-10-24 10:37:39,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:39,599 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 62 transitions. [2021-10-24 10:37:39,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 10:37:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 62 transitions. [2021-10-24 10:37:39,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 10:37:39,601 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:39,601 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:39,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 10:37:39,602 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:39,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:39,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1722055199, now seen corresponding path program 1 times [2021-10-24 10:37:39,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:39,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741323460] [2021-10-24 10:37:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:39,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:37:39,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:39,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741323460] [2021-10-24 10:37:39,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741323460] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:39,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:39,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:39,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58264952] [2021-10-24 10:37:39,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:39,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:39,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:39,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:39,721 INFO L87 Difference]: Start difference. First operand 35 states and 62 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 10:37:39,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:39,756 INFO L93 Difference]: Finished difference Result 65 states and 114 transitions. [2021-10-24 10:37:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:39,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-10-24 10:37:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:39,759 INFO L225 Difference]: With dead ends: 65 [2021-10-24 10:37:39,759 INFO L226 Difference]: Without dead ends: 63 [2021-10-24 10:37:39,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-24 10:37:39,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2021-10-24 10:37:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 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 10:37:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 61 transitions. [2021-10-24 10:37:39,767 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 61 transitions. Word has length 8 [2021-10-24 10:37:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:39,768 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 61 transitions. [2021-10-24 10:37:39,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 10:37:39,769 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 61 transitions. [2021-10-24 10:37:39,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 10:37:39,770 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:39,770 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:39,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 10:37:39,771 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:39,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:39,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1844316027, now seen corresponding path program 1 times [2021-10-24 10:37:39,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:39,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60751072] [2021-10-24 10:37:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:39,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:39,870 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 10:37:39,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:39,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60751072] [2021-10-24 10:37:39,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60751072] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:39,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:39,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:39,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571571513] [2021-10-24 10:37:39,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:39,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:39,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:39,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:39,874 INFO L87 Difference]: Start difference. First operand 35 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 10:37:39,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:39,899 INFO L93 Difference]: Finished difference Result 63 states and 109 transitions. [2021-10-24 10:37:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:39,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-10-24 10:37:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:39,901 INFO L225 Difference]: With dead ends: 63 [2021-10-24 10:37:39,901 INFO L226 Difference]: Without dead ends: 61 [2021-10-24 10:37:39,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-24 10:37:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2021-10-24 10:37:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 34 states have internal predecessors, (60), 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 10:37:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 60 transitions. [2021-10-24 10:37:39,910 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 60 transitions. Word has length 9 [2021-10-24 10:37:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:39,910 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 60 transitions. [2021-10-24 10:37:39,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 10:37:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 60 transitions. [2021-10-24 10:37:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-24 10:37:39,912 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:39,912 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:39,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 10:37:39,913 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:39,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1339434740, now seen corresponding path program 1 times [2021-10-24 10:37:39,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:39,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365973252] [2021-10-24 10:37:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:39,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:40,005 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 10:37:40,006 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:40,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365973252] [2021-10-24 10:37:40,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365973252] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:40,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:40,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:40,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977432183] [2021-10-24 10:37:40,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:40,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:40,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:40,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,010 INFO L87 Difference]: Start difference. First operand 35 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10:37:40,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:40,048 INFO L93 Difference]: Finished difference Result 61 states and 104 transitions. [2021-10-24 10:37:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:40,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-10-24 10:37:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:40,050 INFO L225 Difference]: With dead ends: 61 [2021-10-24 10:37:40,050 INFO L226 Difference]: Without dead ends: 59 [2021-10-24 10:37:40,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-24 10:37:40,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2021-10-24 10:37:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 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 10:37:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 59 transitions. [2021-10-24 10:37:40,056 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 59 transitions. Word has length 10 [2021-10-24 10:37:40,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:40,057 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 59 transitions. [2021-10-24 10:37:40,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10:37:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 59 transitions. [2021-10-24 10:37:40,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 10:37:40,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:40,058 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:40,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-24 10:37:40,059 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:40,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1426982928, now seen corresponding path program 1 times [2021-10-24 10:37:40,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:40,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898246814] [2021-10-24 10:37:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:40,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:40,168 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 10:37:40,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:40,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898246814] [2021-10-24 10:37:40,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898246814] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:40,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:40,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:40,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535830126] [2021-10-24 10:37:40,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:40,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:40,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:40,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,173 INFO L87 Difference]: Start difference. First operand 35 states and 59 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 10:37:40,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:40,215 INFO L93 Difference]: Finished difference Result 59 states and 99 transitions. [2021-10-24 10:37:40,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:40,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2021-10-24 10:37:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:40,217 INFO L225 Difference]: With dead ends: 59 [2021-10-24 10:37:40,217 INFO L226 Difference]: Without dead ends: 57 [2021-10-24 10:37:40,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-24 10:37:40,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2021-10-24 10:37:40,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:37:40,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 58 transitions. [2021-10-24 10:37:40,227 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 58 transitions. Word has length 11 [2021-10-24 10:37:40,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:40,228 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 58 transitions. [2021-10-24 10:37:40,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 10:37:40,228 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 58 transitions. [2021-10-24 10:37:40,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 10:37:40,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:40,230 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:40,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-24 10:37:40,231 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:40,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:40,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1286584375, now seen corresponding path program 1 times [2021-10-24 10:37:40,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:40,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659854548] [2021-10-24 10:37:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:40,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:40,311 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 10:37:40,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:40,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659854548] [2021-10-24 10:37:40,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659854548] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:40,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:40,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:40,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629198016] [2021-10-24 10:37:40,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:40,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:40,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:40,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,315 INFO L87 Difference]: Start difference. First operand 35 states and 58 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 10:37:40,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:40,338 INFO L93 Difference]: Finished difference Result 57 states and 94 transitions. [2021-10-24 10:37:40,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:40,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-10-24 10:37:40,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:40,341 INFO L225 Difference]: With dead ends: 57 [2021-10-24 10:37:40,341 INFO L226 Difference]: Without dead ends: 55 [2021-10-24 10:37:40,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-24 10:37:40,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2021-10-24 10:37:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 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 10:37:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 57 transitions. [2021-10-24 10:37:40,355 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 57 transitions. Word has length 12 [2021-10-24 10:37:40,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:40,356 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 57 transitions. [2021-10-24 10:37:40,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 10:37:40,357 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 57 transitions. [2021-10-24 10:37:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-24 10:37:40,358 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:40,358 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:40,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-24 10:37:40,360 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:40,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1229196187, now seen corresponding path program 1 times [2021-10-24 10:37:40,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:40,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790772581] [2021-10-24 10:37:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:40,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:40,437 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 10:37:40,438 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:40,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790772581] [2021-10-24 10:37:40,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790772581] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:40,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:40,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:40,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055755346] [2021-10-24 10:37:40,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:40,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:40,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:40,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,440 INFO L87 Difference]: Start difference. First operand 35 states and 57 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 10:37:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:40,462 INFO L93 Difference]: Finished difference Result 55 states and 89 transitions. [2021-10-24 10:37:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:40,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2021-10-24 10:37:40,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:40,464 INFO L225 Difference]: With dead ends: 55 [2021-10-24 10:37:40,464 INFO L226 Difference]: Without dead ends: 53 [2021-10-24 10:37:40,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-24 10:37:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2021-10-24 10:37:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 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 10:37:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 56 transitions. [2021-10-24 10:37:40,480 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 56 transitions. Word has length 13 [2021-10-24 10:37:40,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:40,481 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 56 transitions. [2021-10-24 10:37:40,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 10:37:40,481 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 56 transitions. [2021-10-24 10:37:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-24 10:37:40,482 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:40,482 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:40,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-24 10:37:40,483 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:40,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:40,483 INFO L82 PathProgramCache]: Analyzing trace with hash 549837982, now seen corresponding path program 1 times [2021-10-24 10:37:40,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:40,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469336136] [2021-10-24 10:37:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:40,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:40,522 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 10:37:40,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:40,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469336136] [2021-10-24 10:37:40,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469336136] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:40,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:40,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:40,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769697375] [2021-10-24 10:37:40,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:40,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:40,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:40,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,525 INFO L87 Difference]: Start difference. First operand 35 states and 56 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 10:37:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:40,563 INFO L93 Difference]: Finished difference Result 53 states and 84 transitions. [2021-10-24 10:37:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:40,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-10-24 10:37:40,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:40,565 INFO L225 Difference]: With dead ends: 53 [2021-10-24 10:37:40,565 INFO L226 Difference]: Without dead ends: 51 [2021-10-24 10:37:40,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-24 10:37:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2021-10-24 10:37:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 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 10:37:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 55 transitions. [2021-10-24 10:37:40,569 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 55 transitions. Word has length 14 [2021-10-24 10:37:40,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:40,570 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 55 transitions. [2021-10-24 10:37:40,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 10:37:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 55 transitions. [2021-10-24 10:37:40,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-24 10:37:40,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:40,571 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:40,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-24 10:37:40,572 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:40,573 INFO L82 PathProgramCache]: Analyzing trace with hash -134677286, now seen corresponding path program 1 times [2021-10-24 10:37:40,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:40,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103738707] [2021-10-24 10:37:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:40,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:40,622 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 10:37:40,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:40,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103738707] [2021-10-24 10:37:40,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103738707] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:40,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:40,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:40,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552636365] [2021-10-24 10:37:40,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:40,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:40,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:40,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,625 INFO L87 Difference]: Start difference. First operand 35 states and 55 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 10:37:40,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:40,649 INFO L93 Difference]: Finished difference Result 51 states and 79 transitions. [2021-10-24 10:37:40,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:40,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2021-10-24 10:37:40,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:40,651 INFO L225 Difference]: With dead ends: 51 [2021-10-24 10:37:40,651 INFO L226 Difference]: Without dead ends: 49 [2021-10-24 10:37:40,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-24 10:37:40,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-10-24 10:37:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 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 10:37:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 54 transitions. [2021-10-24 10:37:40,656 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 54 transitions. Word has length 15 [2021-10-24 10:37:40,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:40,656 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 54 transitions. [2021-10-24 10:37:40,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 10:37:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 54 transitions. [2021-10-24 10:37:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-24 10:37:40,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:40,658 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:40,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-24 10:37:40,659 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:40,660 INFO L82 PathProgramCache]: Analyzing trace with hash 120186227, now seen corresponding path program 1 times [2021-10-24 10:37:40,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:40,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512448735] [2021-10-24 10:37:40,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:40,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:40,742 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 10:37:40,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:40,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512448735] [2021-10-24 10:37:40,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512448735] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:40,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:40,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:40,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305736015] [2021-10-24 10:37:40,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:40,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:40,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:40,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,746 INFO L87 Difference]: Start difference. First operand 35 states and 54 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 10:37:40,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:40,768 INFO L93 Difference]: Finished difference Result 49 states and 74 transitions. [2021-10-24 10:37:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:40,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2021-10-24 10:37:40,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:40,770 INFO L225 Difference]: With dead ends: 49 [2021-10-24 10:37:40,770 INFO L226 Difference]: Without dead ends: 47 [2021-10-24 10:37:40,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-24 10:37:40,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2021-10-24 10:37:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 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 10:37:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 53 transitions. [2021-10-24 10:37:40,780 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 53 transitions. Word has length 16 [2021-10-24 10:37:40,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:40,781 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 53 transitions. [2021-10-24 10:37:40,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 10:37:40,781 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 53 transitions. [2021-10-24 10:37:40,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-24 10:37:40,784 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:40,784 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:40,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-24 10:37:40,785 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:40,785 INFO L82 PathProgramCache]: Analyzing trace with hash -568979121, now seen corresponding path program 1 times [2021-10-24 10:37:40,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:40,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631775778] [2021-10-24 10:37:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:40,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:40,854 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 10:37:40,854 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:40,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631775778] [2021-10-24 10:37:40,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631775778] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:40,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:40,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:40,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422850504] [2021-10-24 10:37:40,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:40,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:40,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:40,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,857 INFO L87 Difference]: Start difference. First operand 35 states and 53 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 10:37:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:40,880 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2021-10-24 10:37:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:40,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2021-10-24 10:37:40,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:40,881 INFO L225 Difference]: With dead ends: 47 [2021-10-24 10:37:40,881 INFO L226 Difference]: Without dead ends: 45 [2021-10-24 10:37:40,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-24 10:37:40,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2021-10-24 10:37:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 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 10:37:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 52 transitions. [2021-10-24 10:37:40,886 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 52 transitions. Word has length 17 [2021-10-24 10:37:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:40,888 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 52 transitions. [2021-10-24 10:37:40,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 10:37:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 52 transitions. [2021-10-24 10:37:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-24 10:37:40,892 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:40,892 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:40,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-24 10:37:40,893 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:40,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:40,893 INFO L82 PathProgramCache]: Analyzing trace with hash -458268088, now seen corresponding path program 1 times [2021-10-24 10:37:40,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:40,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84235198] [2021-10-24 10:37:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:40,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:40,947 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 10:37:40,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:40,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84235198] [2021-10-24 10:37:40,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84235198] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:40,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:40,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:40,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435670127] [2021-10-24 10:37:40,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:40,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:40,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:40,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,950 INFO L87 Difference]: Start difference. First operand 35 states and 52 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 10:37:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:40,969 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-10-24 10:37:40,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:40,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 18 [2021-10-24 10:37:40,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:40,971 INFO L225 Difference]: With dead ends: 45 [2021-10-24 10:37:40,971 INFO L226 Difference]: Without dead ends: 43 [2021-10-24 10:37:40,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:40,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-24 10:37:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-10-24 10:37:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:37:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 51 transitions. [2021-10-24 10:37:40,974 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 51 transitions. Word has length 18 [2021-10-24 10:37:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:40,975 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 51 transitions. [2021-10-24 10:37:40,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 10:37:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 51 transitions. [2021-10-24 10:37:40,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-24 10:37:40,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:40,976 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:40,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-24 10:37:40,976 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:40,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1321193020, now seen corresponding path program 1 times [2021-10-24 10:37:40,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:40,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408611986] [2021-10-24 10:37:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:40,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:41,034 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 10:37:41,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:41,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408611986] [2021-10-24 10:37:41,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408611986] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:41,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:41,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:41,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997781619] [2021-10-24 10:37:41,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:41,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:41,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:41,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:41,036 INFO L87 Difference]: Start difference. First operand 35 states and 51 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 10:37:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:41,058 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2021-10-24 10:37:41,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:41,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 19 [2021-10-24 10:37:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:41,059 INFO L225 Difference]: With dead ends: 43 [2021-10-24 10:37:41,059 INFO L226 Difference]: Without dead ends: 41 [2021-10-24 10:37:41,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:41,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-24 10:37:41,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2021-10-24 10:37:41,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 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 10:37:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2021-10-24 10:37:41,062 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 50 transitions. Word has length 19 [2021-10-24 10:37:41,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:41,063 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 50 transitions. [2021-10-24 10:37:41,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 10:37:41,063 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 50 transitions. [2021-10-24 10:37:41,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-24 10:37:41,064 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:41,065 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] [2021-10-24 10:37:41,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-24 10:37:41,065 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:41,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:41,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1992905501, now seen corresponding path program 1 times [2021-10-24 10:37:41,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:41,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768390754] [2021-10-24 10:37:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:41,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:41,129 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 10:37:41,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:41,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768390754] [2021-10-24 10:37:41,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768390754] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:41,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:37:41,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:37:41,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82353630] [2021-10-24 10:37:41,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:37:41,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:41,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:37:41,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:41,132 INFO L87 Difference]: Start difference. First operand 35 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 10:37:41,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:41,152 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2021-10-24 10:37:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:37:41,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 20 [2021-10-24 10:37:41,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:41,153 INFO L225 Difference]: With dead ends: 37 [2021-10-24 10:37:41,153 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 10:37:41,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:37:41,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 10:37:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 10:37:41,157 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 10:37:41,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 10:37:41,157 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-10-24 10:37:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:41,158 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 10:37:41,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 10:37:41,158 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 10:37:41,158 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 10:37:41,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:37:41,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-24 10:37:41,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-24 10:37:41,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:37:41,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:37:41,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:37:41,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:37:41,182 INFO L860 garLoopResultBuilder]: At program point L234(lines 6 235) the Hoare annotation is: true [2021-10-24 10:37:41,182 INFO L857 garLoopResultBuilder]: For program point L201(line 201) no Hoare annotation was computed. [2021-10-24 10:37:41,183 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-24 10:37:41,183 INFO L857 garLoopResultBuilder]: For program point L185-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,183 INFO L857 garLoopResultBuilder]: For program point L186(line 186) no Hoare annotation was computed. [2021-10-24 10:37:41,183 INFO L857 garLoopResultBuilder]: For program point L170-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,183 INFO L857 garLoopResultBuilder]: For program point L220-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,183 INFO L857 garLoopResultBuilder]: For program point L171(line 171) no Hoare annotation was computed. [2021-10-24 10:37:41,183 INFO L857 garLoopResultBuilder]: For program point L221(line 221) no Hoare annotation was computed. [2021-10-24 10:37:41,183 INFO L857 garLoopResultBuilder]: For program point L155-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,184 INFO L857 garLoopResultBuilder]: For program point L205-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,184 INFO L857 garLoopResultBuilder]: For program point L156(line 156) no Hoare annotation was computed. [2021-10-24 10:37:41,185 INFO L857 garLoopResultBuilder]: For program point L206(line 206) no Hoare annotation was computed. [2021-10-24 10:37:41,185 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-24 10:37:41,185 INFO L857 garLoopResultBuilder]: For program point L190-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,185 INFO L857 garLoopResultBuilder]: For program point L58(lines 58 60) no Hoare annotation was computed. [2021-10-24 10:37:41,185 INFO L857 garLoopResultBuilder]: For program point L191(line 191) no Hoare annotation was computed. [2021-10-24 10:37:41,186 INFO L857 garLoopResultBuilder]: For program point L175-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,186 INFO L860 garLoopResultBuilder]: At program point L225-1(lines 56 230) the Hoare annotation is: true [2021-10-24 10:37:41,186 INFO L857 garLoopResultBuilder]: For program point L176(line 176) no Hoare annotation was computed. [2021-10-24 10:37:41,186 INFO L857 garLoopResultBuilder]: For program point L226(line 226) no Hoare annotation was computed. [2021-10-24 10:37:41,186 INFO L853 garLoopResultBuilder]: At program point L226-1(lines 7 235) the Hoare annotation is: false [2021-10-24 10:37:41,186 INFO L857 garLoopResultBuilder]: For program point L160-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,186 INFO L857 garLoopResultBuilder]: For program point L210-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,187 INFO L857 garLoopResultBuilder]: For program point L161(line 161) no Hoare annotation was computed. [2021-10-24 10:37:41,187 INFO L857 garLoopResultBuilder]: For program point L211(line 211) no Hoare annotation was computed. [2021-10-24 10:37:41,187 INFO L857 garLoopResultBuilder]: For program point L195-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,187 INFO L857 garLoopResultBuilder]: For program point L196(line 196) no Hoare annotation was computed. [2021-10-24 10:37:41,187 INFO L857 garLoopResultBuilder]: For program point L180-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,187 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 233) no Hoare annotation was computed. [2021-10-24 10:37:41,188 INFO L857 garLoopResultBuilder]: For program point L181(line 181) no Hoare annotation was computed. [2021-10-24 10:37:41,189 INFO L860 garLoopResultBuilder]: At program point L231(lines 7 235) the Hoare annotation is: true [2021-10-24 10:37:41,189 INFO L857 garLoopResultBuilder]: For program point L165-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,189 INFO L857 garLoopResultBuilder]: For program point L215-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,189 INFO L857 garLoopResultBuilder]: For program point L149-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,189 INFO L857 garLoopResultBuilder]: For program point L166(line 166) no Hoare annotation was computed. [2021-10-24 10:37:41,189 INFO L857 garLoopResultBuilder]: For program point L216(line 216) no Hoare annotation was computed. [2021-10-24 10:37:41,190 INFO L857 garLoopResultBuilder]: For program point L200-1(lines 56 230) no Hoare annotation was computed. [2021-10-24 10:37:41,195 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:37:41,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:37:41 BoogieIcfgContainer [2021-10-24 10:37:41,207 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:37:41,207 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:37:41,207 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:37:41,208 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:37:41,208 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:37:38" (3/4) ... [2021-10-24 10:37:41,212 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 10:37:41,233 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-24 10:37:41,233 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-24 10:37:41,234 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 10:37:41,235 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 10:37:41,329 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:37:41,329 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:37:41,331 INFO L168 Benchmark]: Toolchain (without parser) took 4139.05 ms. Allocated memory was 104.9 MB in the beginning and 153.1 MB in the end (delta: 48.2 MB). Free memory was 64.8 MB in the beginning and 85.5 MB in the end (delta: -20.7 MB). Peak memory consumption was 28.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:37:41,332 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 81.2 MB in the end (delta: 41.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:37:41,333 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.53 ms. Allocated memory is still 104.9 MB. Free memory was 64.5 MB in the beginning and 78.6 MB in the end (delta: -14.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-24 10:37:41,333 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.22 ms. Allocated memory is still 104.9 MB. Free memory was 78.6 MB in the beginning and 76.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:37:41,334 INFO L168 Benchmark]: Boogie Preprocessor took 52.36 ms. Allocated memory is still 104.9 MB. Free memory was 76.8 MB in the beginning and 75.2 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:37:41,334 INFO L168 Benchmark]: RCFGBuilder took 1011.25 ms. Allocated memory is still 104.9 MB. Free memory was 75.2 MB in the beginning and 44.7 MB in the end (delta: 30.4 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:37:41,334 INFO L168 Benchmark]: TraceAbstraction took 2545.09 ms. Allocated memory was 104.9 MB in the beginning and 153.1 MB in the end (delta: 48.2 MB). Free memory was 44.4 MB in the beginning and 90.8 MB in the end (delta: -46.3 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:37:41,335 INFO L168 Benchmark]: Witness Printer took 121.98 ms. Allocated memory is still 153.1 MB. Free memory was 90.8 MB in the beginning and 85.5 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:37:41,338 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 81.2 MB in the end (delta: 41.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 349.53 ms. Allocated memory is still 104.9 MB. Free memory was 64.5 MB in the beginning and 78.6 MB in the end (delta: -14.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.22 ms. Allocated memory is still 104.9 MB. Free memory was 78.6 MB in the beginning and 76.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.36 ms. Allocated memory is still 104.9 MB. Free memory was 76.8 MB in the beginning and 75.2 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1011.25 ms. Allocated memory is still 104.9 MB. Free memory was 75.2 MB in the beginning and 44.7 MB in the end (delta: 30.4 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2545.09 ms. Allocated memory was 104.9 MB in the beginning and 153.1 MB in the end (delta: 48.2 MB). Free memory was 44.4 MB in the beginning and 90.8 MB in the end (delta: -46.3 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * Witness Printer took 121.98 ms. Allocated memory is still 153.1 MB. Free memory was 90.8 MB in the beginning and 85.5 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 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: 233]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2443.7ms, OverallIterations: 15, TraceHistogramMax: 1, EmptinessCheckTime: 30.2ms, AutomataDifference: 583.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 18.7ms, InitialAbstractionConstructionTime: 14.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 815 SDtfs, 692 SDslu, 1230 SDs, 0 SdLazy, 151 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 263.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 153.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 134.1ms AutomataMinimizationTime, 15 MinimizatonAttempts, 266 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 7.4ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 3.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 53.5ms SsaConstructionTime, 345.3ms SatisfiabilityAnalysisTime, 899.3ms InterpolantComputationTime, 195 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 15 PerfectInterpolantSequences, 0/0 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: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-24 10:37:41,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e795a716-bb4c-4ac4-b1eb-8b1e95e15de9/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...