./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label08.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1fca60a421a39fa5f3f8d3bde13bd29dacb18de8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:35:34,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:35:34,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:35:34,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:35:34,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:35:34,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:35:34,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:35:34,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:35:34,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:35:34,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:35:34,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:35:34,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:35:34,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:35:34,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:35:34,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:35:34,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:35:34,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:35:34,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:35:34,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:35:34,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:35:34,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:35:34,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:35:34,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:35:34,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:35:34,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:35:34,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:35:34,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:35:34,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:35:34,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:35:34,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:35:34,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:35:34,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:35:34,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:35:34,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:35:34,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:35:34,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:35:34,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:35:34,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:35:34,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:35:34,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:35:34,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:35:34,788 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:35:34,817 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:35:34,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:35:34,818 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:35:34,818 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:35:34,819 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:35:34,819 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:35:34,819 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:35:34,819 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:35:34,820 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:35:34,820 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:35:34,820 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:35:34,820 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:35:34,820 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:35:34,820 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:35:34,821 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:35:34,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:35:34,822 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:35:34,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:35:34,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:35:34,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:35:34,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:35:34,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:35:34,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:35:34,828 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:35:34,828 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:35:34,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:35:34,828 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:35:34,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:35:34,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:35:34,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:35:34,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:35:34,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:35:34,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:35:34,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:35:34,831 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:35:34,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:35:34,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:35:34,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:35:34,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:35:34,832 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_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fca60a421a39fa5f3f8d3bde13bd29dacb18de8 [2021-10-16 02:35:35,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:35:35,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:35:35,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:35:35,159 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:35:35,160 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:35:35,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/eca-rers2012/Problem01_label08.c [2021-10-16 02:35:35,225 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/data/711f1b1a2/80bae5d51fce417d98c59833bf15c597/FLAG2c919e9f0 [2021-10-16 02:35:35,874 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:35:35,875 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/sv-benchmarks/c/eca-rers2012/Problem01_label08.c [2021-10-16 02:35:35,899 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/data/711f1b1a2/80bae5d51fce417d98c59833bf15c597/FLAG2c919e9f0 [2021-10-16 02:35:36,098 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/data/711f1b1a2/80bae5d51fce417d98c59833bf15c597 [2021-10-16 02:35:36,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:35:36,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:35:36,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:35:36,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:35:36,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:35:36,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:35:36" (1/1) ... [2021-10-16 02:35:36,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bdfbd8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:36, skipping insertion in model container [2021-10-16 02:35:36,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:35:36" (1/1) ... [2021-10-16 02:35:36,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:35:36,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:35:36,691 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_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/sv-benchmarks/c/eca-rers2012/Problem01_label08.c[19599,19612] [2021-10-16 02:35:36,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:35:36,739 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:35:36,826 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_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/sv-benchmarks/c/eca-rers2012/Problem01_label08.c[19599,19612] [2021-10-16 02:35:36,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:35:36,870 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:35:36,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:36 WrapperNode [2021-10-16 02:35:36,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:35:36,872 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:35:36,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:35:36,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:35:36,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:36" (1/1) ... [2021-10-16 02:35:36,913 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:36" (1/1) ... [2021-10-16 02:35:37,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:35:37,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:35:37,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:35:37,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:35:37,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:36" (1/1) ... [2021-10-16 02:35:37,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:36" (1/1) ... [2021-10-16 02:35:37,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:36" (1/1) ... [2021-10-16 02:35:37,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:36" (1/1) ... [2021-10-16 02:35:37,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:36" (1/1) ... [2021-10-16 02:35:37,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:36" (1/1) ... [2021-10-16 02:35:37,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:36" (1/1) ... [2021-10-16 02:35:37,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:35:37,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:35:37,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:35:37,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:35:37,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:36" (1/1) ... [2021-10-16 02:35:37,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:35:37,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:37,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:35:37,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:35:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:35:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:35:37,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:35:37,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:35:39,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:35:39,215 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:35:39,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:35:39 BoogieIcfgContainer [2021-10-16 02:35:39,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:35:39,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:35:39,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:35:39,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:35:39,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:35:36" (1/3) ... [2021-10-16 02:35:39,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6828e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:35:39, skipping insertion in model container [2021-10-16 02:35:39,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:36" (2/3) ... [2021-10-16 02:35:39,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6828e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:35:39, skipping insertion in model container [2021-10-16 02:35:39,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:35:39" (3/3) ... [2021-10-16 02:35:39,231 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label08.c [2021-10-16 02:35:39,240 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:35:39,241 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:35:39,312 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:35:39,323 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:35:39,324 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:35:39,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:39,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-16 02:35:39,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:39,357 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:39,357 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:39,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:39,363 INFO L82 PathProgramCache]: Analyzing trace with hash 379025287, now seen corresponding path program 1 times [2021-10-16 02:35:39,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:35:39,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788395220] [2021-10-16 02:35:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:39,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:35:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:39,757 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:35:39,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788395220] [2021-10-16 02:35:39,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788395220] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:39,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:39,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:35:39,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987535248] [2021-10-16 02:35:39,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:35:39,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:35:39,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:35:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:39,794 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:40,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:40,317 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-16 02:35:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:35:40,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-10-16 02:35:40,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:40,341 INFO L225 Difference]: With dead ends: 224 [2021-10-16 02:35:40,342 INFO L226 Difference]: Without dead ends: 145 [2021-10-16 02:35:40,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:40,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-16 02:35:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-16 02:35:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7986111111111112) internal successors, (259), 144 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2021-10-16 02:35:40,415 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2021-10-16 02:35:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:40,416 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2021-10-16 02:35:40,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2021-10-16 02:35:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-16 02:35:40,420 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:40,420 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:40,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:35:40,421 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:40,422 INFO L82 PathProgramCache]: Analyzing trace with hash -615336422, now seen corresponding path program 1 times [2021-10-16 02:35:40,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:35:40,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131139010] [2021-10-16 02:35:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:40,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:35:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:40,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:35:40,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131139010] [2021-10-16 02:35:40,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131139010] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:40,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:40,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:35:40,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636776631] [2021-10-16 02:35:40,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:35:40,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:35:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:35:40,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:40,498 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:40,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:40,912 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2021-10-16 02:35:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:35:40,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 77 [2021-10-16 02:35:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:40,916 INFO L225 Difference]: With dead ends: 431 [2021-10-16 02:35:40,916 INFO L226 Difference]: Without dead ends: 287 [2021-10-16 02:35:40,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:40,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-16 02:35:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-16 02:35:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.632867132867133) internal successors, (467), 286 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 467 transitions. [2021-10-16 02:35:40,938 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 467 transitions. Word has length 77 [2021-10-16 02:35:40,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:40,939 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 467 transitions. [2021-10-16 02:35:40,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 467 transitions. [2021-10-16 02:35:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-16 02:35:40,943 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:40,943 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:40,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:35:40,944 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1933825803, now seen corresponding path program 1 times [2021-10-16 02:35:40,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:35:40,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693001421] [2021-10-16 02:35:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:40,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:35:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:35:41,035 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:35:41,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693001421] [2021-10-16 02:35:41,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693001421] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:41,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:41,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:35:41,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661819744] [2021-10-16 02:35:41,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:35:41,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:35:41,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:35:41,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:41,039 INFO L87 Difference]: Start difference. First operand 287 states and 467 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:41,414 INFO L93 Difference]: Finished difference Result 715 states and 1184 transitions. [2021-10-16 02:35:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:35:41,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-10-16 02:35:41,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:41,424 INFO L225 Difference]: With dead ends: 715 [2021-10-16 02:35:41,424 INFO L226 Difference]: Without dead ends: 429 [2021-10-16 02:35:41,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:41,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-16 02:35:41,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 358. [2021-10-16 02:35:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6442577030812324) internal successors, (587), 357 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 587 transitions. [2021-10-16 02:35:41,465 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 587 transitions. Word has length 105 [2021-10-16 02:35:41,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:41,465 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 587 transitions. [2021-10-16 02:35:41,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:41,466 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 587 transitions. [2021-10-16 02:35:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-16 02:35:41,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:41,470 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:41,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:35:41,471 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:41,471 INFO L82 PathProgramCache]: Analyzing trace with hash 218745791, now seen corresponding path program 1 times [2021-10-16 02:35:41,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:35:41,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223051150] [2021-10-16 02:35:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:41,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:35:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-16 02:35:41,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:35:41,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223051150] [2021-10-16 02:35:41,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223051150] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:41,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:41,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:35:41,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925272869] [2021-10-16 02:35:41,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:35:41,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:35:41,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:35:41,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:41,602 INFO L87 Difference]: Start difference. First operand 358 states and 587 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:41,904 INFO L93 Difference]: Finished difference Result 715 states and 1173 transitions. [2021-10-16 02:35:41,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:35:41,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-10-16 02:35:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:41,908 INFO L225 Difference]: With dead ends: 715 [2021-10-16 02:35:41,908 INFO L226 Difference]: Without dead ends: 358 [2021-10-16 02:35:41,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-10-16 02:35:41,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2021-10-16 02:35:41,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6274509803921569) internal successors, (581), 357 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:41,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 581 transitions. [2021-10-16 02:35:41,936 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 581 transitions. Word has length 109 [2021-10-16 02:35:41,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:41,936 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 581 transitions. [2021-10-16 02:35:41,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:41,937 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 581 transitions. [2021-10-16 02:35:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-16 02:35:41,940 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:41,941 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:41,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 02:35:41,941 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:41,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:41,942 INFO L82 PathProgramCache]: Analyzing trace with hash 674879479, now seen corresponding path program 1 times [2021-10-16 02:35:41,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:35:41,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749562789] [2021-10-16 02:35:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:41,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:35:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-16 02:35:42,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:35:42,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749562789] [2021-10-16 02:35:42,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749562789] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:42,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:42,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:35:42,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339997508] [2021-10-16 02:35:42,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:35:42,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:35:42,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:35:42,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:42,007 INFO L87 Difference]: Start difference. First operand 358 states and 581 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:42,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:42,340 INFO L93 Difference]: Finished difference Result 857 states and 1369 transitions. [2021-10-16 02:35:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:35:42,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-10-16 02:35:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:42,344 INFO L225 Difference]: With dead ends: 857 [2021-10-16 02:35:42,344 INFO L226 Difference]: Without dead ends: 500 [2021-10-16 02:35:42,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:42,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-10-16 02:35:42,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2021-10-16 02:35:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.5210420841683367) internal successors, (759), 499 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 759 transitions. [2021-10-16 02:35:42,393 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 759 transitions. Word has length 113 [2021-10-16 02:35:42,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:42,394 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 759 transitions. [2021-10-16 02:35:42,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:42,394 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 759 transitions. [2021-10-16 02:35:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-16 02:35:42,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:42,403 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:42,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:35:42,403 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:42,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:42,404 INFO L82 PathProgramCache]: Analyzing trace with hash -692381771, now seen corresponding path program 1 times [2021-10-16 02:35:42,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:35:42,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604707626] [2021-10-16 02:35:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:42,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:35:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-16 02:35:42,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:35:42,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604707626] [2021-10-16 02:35:42,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604707626] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:42,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:42,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:35:42,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734900365] [2021-10-16 02:35:42,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:35:42,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:35:42,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:35:42,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:42,547 INFO L87 Difference]: Start difference. First operand 500 states and 759 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:42,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:42,933 INFO L93 Difference]: Finished difference Result 1354 states and 2016 transitions. [2021-10-16 02:35:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:35:42,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-10-16 02:35:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:42,939 INFO L225 Difference]: With dead ends: 1354 [2021-10-16 02:35:42,940 INFO L226 Difference]: Without dead ends: 855 [2021-10-16 02:35:42,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-16 02:35:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 642. [2021-10-16 02:35:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.4804992199687987) internal successors, (949), 641 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 949 transitions. [2021-10-16 02:35:42,964 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 949 transitions. Word has length 122 [2021-10-16 02:35:42,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:42,965 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 949 transitions. [2021-10-16 02:35:42,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 949 transitions. [2021-10-16 02:35:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-16 02:35:42,968 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:42,968 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:42,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 02:35:42,969 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:42,969 INFO L82 PathProgramCache]: Analyzing trace with hash 240374715, now seen corresponding path program 1 times [2021-10-16 02:35:42,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:35:42,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765184998] [2021-10-16 02:35:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:42,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:35:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-16 02:35:43,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:35:43,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765184998] [2021-10-16 02:35:43,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765184998] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:43,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:43,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:35:43,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7543] [2021-10-16 02:35:43,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:35:43,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:35:43,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:35:43,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:43,047 INFO L87 Difference]: Start difference. First operand 642 states and 949 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:43,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:43,371 INFO L93 Difference]: Finished difference Result 1354 states and 2010 transitions. [2021-10-16 02:35:43,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:35:43,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 138 [2021-10-16 02:35:43,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:43,377 INFO L225 Difference]: With dead ends: 1354 [2021-10-16 02:35:43,377 INFO L226 Difference]: Without dead ends: 713 [2021-10-16 02:35:43,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:43,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-10-16 02:35:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2021-10-16 02:35:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.4578651685393258) internal successors, (1038), 712 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1038 transitions. [2021-10-16 02:35:43,409 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1038 transitions. Word has length 138 [2021-10-16 02:35:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:43,410 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1038 transitions. [2021-10-16 02:35:43,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1038 transitions. [2021-10-16 02:35:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-16 02:35:43,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:43,414 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:43,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 02:35:43,415 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:43,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1229085797, now seen corresponding path program 1 times [2021-10-16 02:35:43,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:35:43,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812006156] [2021-10-16 02:35:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:43,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:35:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-16 02:35:43,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:35:43,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812006156] [2021-10-16 02:35:43,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812006156] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:43,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:43,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:35:43,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606918590] [2021-10-16 02:35:43,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:35:43,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:35:43,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:35:43,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:35:43,556 INFO L87 Difference]: Start difference. First operand 713 states and 1038 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:44,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:44,093 INFO L93 Difference]: Finished difference Result 1780 states and 2557 transitions. [2021-10-16 02:35:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:35:44,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-10-16 02:35:44,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:44,100 INFO L225 Difference]: With dead ends: 1780 [2021-10-16 02:35:44,100 INFO L226 Difference]: Without dead ends: 997 [2021-10-16 02:35:44,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:35:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-16 02:35:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-10-16 02:35:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.2359437751004017) internal successors, (1231), 996 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1231 transitions. [2021-10-16 02:35:44,132 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1231 transitions. Word has length 154 [2021-10-16 02:35:44,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:44,133 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1231 transitions. [2021-10-16 02:35:44,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:44,133 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1231 transitions. [2021-10-16 02:35:44,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-16 02:35:44,137 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:44,137 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:44,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 02:35:44,138 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:44,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2145598008, now seen corresponding path program 1 times [2021-10-16 02:35:44,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:35:44,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232875606] [2021-10-16 02:35:44,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:44,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:35:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-16 02:35:44,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:35:44,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232875606] [2021-10-16 02:35:44,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232875606] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:44,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:44,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:35:44,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491166973] [2021-10-16 02:35:44,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:35:44,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:35:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:35:44,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:35:44,228 INFO L87 Difference]: Start difference. First operand 997 states and 1231 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:44,738 INFO L93 Difference]: Finished difference Result 2206 states and 2715 transitions. [2021-10-16 02:35:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:35:44,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-10-16 02:35:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:44,752 INFO L225 Difference]: With dead ends: 2206 [2021-10-16 02:35:44,752 INFO L226 Difference]: Without dead ends: 1210 [2021-10-16 02:35:44,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:35:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-16 02:35:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 997. [2021-10-16 02:35:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.1927710843373494) internal successors, (1188), 996 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:44,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1188 transitions. [2021-10-16 02:35:44,796 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1188 transitions. Word has length 171 [2021-10-16 02:35:44,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:44,798 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1188 transitions. [2021-10-16 02:35:44,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1188 transitions. [2021-10-16 02:35:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-10-16 02:35:44,802 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:44,803 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:44,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 02:35:44,804 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:44,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:44,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1532628297, now seen corresponding path program 1 times [2021-10-16 02:35:44,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:35:44,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914052352] [2021-10-16 02:35:44,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:44,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:35:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:45,168 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:35:45,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914052352] [2021-10-16 02:35:45,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914052352] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:35:45,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239158340] [2021-10-16 02:35:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:45,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:45,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:45,176 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:35:45,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:35:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:45,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:35:45,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-16 02:35:46,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-16 02:35:46,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239158340] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:46,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:35:46,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 6 [2021-10-16 02:35:46,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466648620] [2021-10-16 02:35:46,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:35:46,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:35:46,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:35:46,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:35:46,574 INFO L87 Difference]: Start difference. First operand 997 states and 1188 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:46,870 INFO L93 Difference]: Finished difference Result 1709 states and 2015 transitions. [2021-10-16 02:35:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:35:46,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 175 [2021-10-16 02:35:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:46,884 INFO L225 Difference]: With dead ends: 1709 [2021-10-16 02:35:46,884 INFO L226 Difference]: Without dead ends: 1707 [2021-10-16 02:35:46,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:35:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-16 02:35:46,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1565. [2021-10-16 02:35:46,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1564 states have (on average 1.1796675191815857) internal successors, (1845), 1564 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:46,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1845 transitions. [2021-10-16 02:35:46,940 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1845 transitions. Word has length 175 [2021-10-16 02:35:46,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:46,940 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 1845 transitions. [2021-10-16 02:35:46,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1845 transitions. [2021-10-16 02:35:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-10-16 02:35:46,947 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:46,948 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:46,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:47,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:47,163 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:47,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1287881272, now seen corresponding path program 1 times [2021-10-16 02:35:47,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:35:47,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892684321] [2021-10-16 02:35:47,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:47,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:35:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-10-16 02:35:47,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:35:47,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892684321] [2021-10-16 02:35:47,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892684321] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:47,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:47,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:35:47,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280929451] [2021-10-16 02:35:47,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:35:47,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:35:47,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:35:47,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:35:47,311 INFO L87 Difference]: Start difference. First operand 1565 states and 1845 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:47,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:47,750 INFO L93 Difference]: Finished difference Result 3200 states and 3779 transitions. [2021-10-16 02:35:47,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:35:47,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 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 202 [2021-10-16 02:35:47,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:47,766 INFO L225 Difference]: With dead ends: 3200 [2021-10-16 02:35:47,766 INFO L226 Difference]: Without dead ends: 1636 [2021-10-16 02:35:47,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:35:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-10-16 02:35:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1636. [2021-10-16 02:35:47,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 1.164525993883792) internal successors, (1904), 1635 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1904 transitions. [2021-10-16 02:35:47,821 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1904 transitions. Word has length 202 [2021-10-16 02:35:47,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:47,821 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 1904 transitions. [2021-10-16 02:35:47,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:47,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1904 transitions. [2021-10-16 02:35:47,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-10-16 02:35:47,828 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:47,829 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:47,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-16 02:35:47,832 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:47,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:47,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1529632152, now seen corresponding path program 1 times [2021-10-16 02:35:47,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:35:47,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863411329] [2021-10-16 02:35:47,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:47,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:35:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-10-16 02:35:47,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:35:47,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863411329] [2021-10-16 02:35:47,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863411329] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:47,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:47,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:35:47,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46951878] [2021-10-16 02:35:47,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:35:47,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:35:47,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:35:47,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:47,956 INFO L87 Difference]: Start difference. First operand 1636 states and 1904 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:48,286 INFO L93 Difference]: Finished difference Result 3555 states and 4140 transitions. [2021-10-16 02:35:48,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:35:48,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 233 [2021-10-16 02:35:48,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:48,298 INFO L225 Difference]: With dead ends: 3555 [2021-10-16 02:35:48,298 INFO L226 Difference]: Without dead ends: 1920 [2021-10-16 02:35:48,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:48,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-10-16 02:35:48,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1849. [2021-10-16 02:35:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 1.146103896103896) internal successors, (2118), 1848 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2118 transitions. [2021-10-16 02:35:48,365 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2118 transitions. Word has length 233 [2021-10-16 02:35:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:48,366 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2118 transitions. [2021-10-16 02:35:48,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:48,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2118 transitions. [2021-10-16 02:35:48,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-10-16 02:35:48,398 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:48,398 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:48,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-16 02:35:48,399 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:48,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:48,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1886815535, now seen corresponding path program 1 times [2021-10-16 02:35:48,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:35:48,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463550590] [2021-10-16 02:35:48,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:48,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:35:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 182 proven. 103 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-16 02:35:48,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:35:48,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463550590] [2021-10-16 02:35:48,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463550590] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:35:48,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209364077] [2021-10-16 02:35:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:48,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:48,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:48,647 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:35:48,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:35:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:48,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:35:48,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-16 02:35:49,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-16 02:35:50,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209364077] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:50,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:35:50,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-16 02:35:50,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888627921] [2021-10-16 02:35:50,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:35:50,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:35:50,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:35:50,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:35:50,034 INFO L87 Difference]: Start difference. First operand 1849 states and 2118 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:50,321 INFO L93 Difference]: Finished difference Result 2135 states and 2428 transitions. [2021-10-16 02:35:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:35:50,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2021-10-16 02:35:50,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:50,334 INFO L225 Difference]: With dead ends: 2135 [2021-10-16 02:35:50,334 INFO L226 Difference]: Without dead ends: 2133 [2021-10-16 02:35:50,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 508 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:35:50,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-10-16 02:35:50,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1778. [2021-10-16 02:35:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 1.1418120427687113) internal successors, (2029), 1777 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2029 transitions. [2021-10-16 02:35:50,391 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2029 transitions. Word has length 255 [2021-10-16 02:35:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:50,392 INFO L470 AbstractCegarLoop]: Abstraction has 1778 states and 2029 transitions. [2021-10-16 02:35:50,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2029 transitions. [2021-10-16 02:35:50,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-10-16 02:35:50,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:50,401 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:50,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:50,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-16 02:35:50,627 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:35:50,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:50,628 INFO L82 PathProgramCache]: Analyzing trace with hash -791200203, now seen corresponding path program 1 times [2021-10-16 02:35:50,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:35:50,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253672043] [2021-10-16 02:35:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:50,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:35:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 366 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-10-16 02:35:50,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:35:50,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253672043] [2021-10-16 02:35:50,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253672043] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:50,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:50,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:35:50,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356684101] [2021-10-16 02:35:50,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:35:50,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:35:50,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:35:50,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:50,788 INFO L87 Difference]: Start difference. First operand 1778 states and 2029 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:51,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:51,085 INFO L93 Difference]: Finished difference Result 3056 states and 3513 transitions. [2021-10-16 02:35:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:35:51,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2021-10-16 02:35:51,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:51,086 INFO L225 Difference]: With dead ends: 3056 [2021-10-16 02:35:51,086 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:35:51,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:35:51,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:35:51,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:35:51,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:35:51,091 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 267 [2021-10-16 02:35:51,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:51,091 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:35:51,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:51,092 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:35:51,092 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:35:51,094 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:35:51,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-16 02:35:51,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:35:51,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:35:51,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:35:51,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:35:51,579 INFO L857 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-16 02:35:51,580 INFO L857 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-16 02:35:51,580 INFO L857 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-16 02:35:51,580 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-16 02:35:51,580 INFO L857 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-16 02:35:51,580 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-16 02:35:51,580 INFO L857 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-16 02:35:51,580 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-16 02:35:51,581 INFO L857 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-16 02:35:51,581 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-16 02:35:51,581 INFO L857 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-16 02:35:51,581 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-16 02:35:51,581 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-16 02:35:51,581 INFO L857 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-16 02:35:51,581 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-16 02:35:51,582 INFO L857 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-16 02:35:51,582 INFO L857 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-16 02:35:51,582 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-16 02:35:51,582 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-16 02:35:51,582 INFO L857 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-16 02:35:51,582 INFO L857 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-16 02:35:51,582 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-16 02:35:51,583 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-16 02:35:51,583 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-16 02:35:51,583 INFO L857 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-16 02:35:51,583 INFO L857 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-16 02:35:51,583 INFO L857 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-16 02:35:51,583 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-16 02:35:51,583 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-16 02:35:51,583 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-16 02:35:51,584 INFO L857 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-16 02:35:51,584 INFO L857 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-16 02:35:51,584 INFO L857 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-16 02:35:51,584 INFO L857 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-16 02:35:51,584 INFO L857 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-16 02:35:51,584 INFO L857 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-16 02:35:51,584 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:35:51,584 INFO L857 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-16 02:35:51,585 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-16 02:35:51,585 INFO L857 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-16 02:35:51,585 INFO L853 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse3 (= ~a7~0 1)) (.cse4 (<= ~a16~0 5)) (.cse7 (<= ~a16~0 4)) (.cse6 (= ~a17~0 1)) (.cse0 (<= ~a7~0 0)) (.cse2 (<= 14 ~a8~0)) (.cse1 (= ~a21~0 1)) (.cse5 (= ~a20~0 1))) (or (and .cse0 .cse1 (<= 15 ~a8~0)) (and .cse2 .cse1 .cse3 .cse4) (and .cse3 .cse5) (and .cse0 .cse2 .cse1 .cse4) (and .cse6 .cse3 .cse4) (and .cse0 .cse1 .cse7) (and .cse1 .cse6 .cse7 .cse5) (and .cse0 .cse1 .cse6 .cse5) (and .cse0 .cse2 .cse1 .cse5))) [2021-10-16 02:35:51,585 INFO L857 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-16 02:35:51,586 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-16 02:35:51,586 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-16 02:35:51,586 INFO L857 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-16 02:35:51,586 INFO L857 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-16 02:35:51,586 INFO L857 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-16 02:35:51,586 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-16 02:35:51,586 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:35:51,586 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-16 02:35:51,587 INFO L860 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-16 02:35:51,587 INFO L857 garLoopResultBuilder]: For program point L521-1(lines 40 585) no Hoare annotation was computed. [2021-10-16 02:35:51,587 INFO L857 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-16 02:35:51,587 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-16 02:35:51,587 INFO L857 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-16 02:35:51,587 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-16 02:35:51,587 INFO L857 garLoopResultBuilder]: For program point L524-1(lines 40 585) no Hoare annotation was computed. [2021-10-16 02:35:51,588 INFO L857 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-16 02:35:51,588 INFO L857 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-16 02:35:51,588 INFO L857 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-16 02:35:51,588 INFO L857 garLoopResultBuilder]: For program point L525(line 525) no Hoare annotation was computed. [2021-10-16 02:35:51,588 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-16 02:35:51,588 INFO L857 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-16 02:35:51,588 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-16 02:35:51,589 INFO L857 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-16 02:35:51,589 INFO L857 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-16 02:35:51,589 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-16 02:35:51,589 INFO L853 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse3 (= ~a7~0 1)) (.cse4 (<= ~a16~0 5)) (.cse7 (<= ~a16~0 4)) (.cse6 (= ~a17~0 1)) (.cse0 (<= ~a7~0 0)) (.cse2 (<= 14 ~a8~0)) (.cse1 (= ~a21~0 1)) (.cse5 (= ~a20~0 1))) (or (and .cse0 .cse1 (<= 15 ~a8~0)) (and .cse2 .cse1 .cse3 .cse4) (and .cse3 .cse5) (and .cse0 .cse2 .cse1 .cse4) (and .cse6 .cse3 .cse4) (and .cse0 .cse1 .cse7) (and .cse1 .cse6 .cse7 .cse5) (and .cse0 .cse1 .cse6 .cse5) (and .cse0 .cse2 .cse1 .cse5))) [2021-10-16 02:35:51,589 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-16 02:35:51,589 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 525) no Hoare annotation was computed. [2021-10-16 02:35:51,590 INFO L857 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-16 02:35:51,590 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-16 02:35:51,590 INFO L857 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-16 02:35:51,590 INFO L857 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-16 02:35:51,590 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-16 02:35:51,590 INFO L857 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-16 02:35:51,599 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:35:51,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:35:51 BoogieIcfgContainer [2021-10-16 02:35:51,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:35:51,644 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:35:51,644 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:35:51,645 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:35:51,646 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:35:39" (3/4) ... [2021-10-16 02:35:51,649 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:35:51,686 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 108 nodes and edges [2021-10-16 02:35:51,688 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-16 02:35:51,690 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-16 02:35:51,692 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:35:51,862 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:35:51,863 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:35:51,865 INFO L168 Benchmark]: Toolchain (without parser) took 15752.48 ms. Allocated memory was 111.1 MB in the beginning and 207.6 MB in the end (delta: 96.5 MB). Free memory was 71.8 MB in the beginning and 98.4 MB in the end (delta: -26.6 MB). Peak memory consumption was 69.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:35:51,865 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 111.1 MB. Free memory is still 89.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:35:51,866 INFO L168 Benchmark]: CACSL2BoogieTranslator took 753.82 ms. Allocated memory is still 111.1 MB. Free memory was 71.6 MB in the beginning and 69.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:35:51,866 INFO L168 Benchmark]: Boogie Procedure Inliner took 145.74 ms. Allocated memory is still 111.1 MB. Free memory was 69.5 MB in the beginning and 64.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:35:51,867 INFO L168 Benchmark]: Boogie Preprocessor took 73.40 ms. Allocated memory is still 111.1 MB. Free memory was 64.0 MB in the beginning and 59.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:35:51,867 INFO L168 Benchmark]: RCFGBuilder took 2125.47 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 59.8 MB in the beginning and 87.4 MB in the end (delta: -27.5 MB). Peak memory consumption was 42.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:35:51,868 INFO L168 Benchmark]: TraceAbstraction took 12420.87 ms. Allocated memory was 142.6 MB in the beginning and 207.6 MB in the end (delta: 65.0 MB). Free memory was 87.4 MB in the beginning and 114.1 MB in the end (delta: -26.7 MB). Peak memory consumption was 38.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:35:51,868 INFO L168 Benchmark]: Witness Printer took 218.69 ms. Allocated memory is still 207.6 MB. Free memory was 113.0 MB in the beginning and 98.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:35:51,871 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 111.1 MB. Free memory is still 89.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 753.82 ms. Allocated memory is still 111.1 MB. Free memory was 71.6 MB in the beginning and 69.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 145.74 ms. Allocated memory is still 111.1 MB. Free memory was 69.5 MB in the beginning and 64.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 73.40 ms. Allocated memory is still 111.1 MB. Free memory was 64.0 MB in the beginning and 59.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2125.47 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 59.8 MB in the beginning and 87.4 MB in the end (delta: -27.5 MB). Peak memory consumption was 42.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12420.87 ms. Allocated memory was 142.6 MB in the beginning and 207.6 MB in the end (delta: 65.0 MB). Free memory was 87.4 MB in the beginning and 114.1 MB in the end (delta: -26.7 MB). Peak memory consumption was 38.3 MB. Max. memory is 16.1 GB. * Witness Printer took 218.69 ms. Allocated memory is still 207.6 MB. Free memory was 113.0 MB in the beginning and 98.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 525]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12288.8ms, OverallIterations: 14, TraceHistogramMax: 7, EmptinessCheckTime: 103.8ms, AutomataDifference: 5566.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 483.6ms, InitialAbstractionConstructionTime: 18.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 586 SDtfs, 991 SDslu, 62 SDs, 0 SdLazy, 3200 SolverSat, 803 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3786.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 897 GetRequests, 871 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 137.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1849occurred in iteration=12, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 522.9ms AutomataMinimizationTime, 14 MinimizatonAttempts, 1065 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 43 NumberOfFragments, 207 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2878 FormulaSimplificationTreeSizeReduction, 69.2ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 182 FormulaSimplificationTreeSizeReductionInter, 405.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 238.1ms SsaConstructionTime, 605.6ms SatisfiabilityAnalysisTime, 3780.3ms InterpolantComputationTime, 2622 NumberOfCodeBlocks, 2622 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 3034 ConstructedInterpolants, 0 QuantifiedInterpolants, 10441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 887 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 18 InterpolantComputations, 16 PerfectInterpolantSequences, 3081/3276 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((((((a7 <= 0 && a21 == 1) && 15 <= a8) || (((14 <= a8 && a21 == 1) && a7 == 1) && a16 <= 5)) || (a7 == 1 && a20 == 1)) || (((a7 <= 0 && 14 <= a8) && a21 == 1) && a16 <= 5)) || ((a17 == 1 && a7 == 1) && a16 <= 5)) || ((a7 <= 0 && a21 == 1) && a16 <= 4)) || (((a21 == 1 && a17 == 1) && a16 <= 4) && a20 == 1)) || (((a7 <= 0 && a21 == 1) && a17 == 1) && a20 == 1)) || (((a7 <= 0 && 14 <= a8) && a21 == 1) && a20 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((((a7 <= 0 && a21 == 1) && 15 <= a8) || (((14 <= a8 && a21 == 1) && a7 == 1) && a16 <= 5)) || (a7 == 1 && a20 == 1)) || (((a7 <= 0 && 14 <= a8) && a21 == 1) && a16 <= 5)) || ((a17 == 1 && a7 == 1) && a16 <= 5)) || ((a7 <= 0 && a21 == 1) && a16 <= 4)) || (((a21 == 1 && a17 == 1) && a16 <= 4) && a20 == 1)) || (((a7 <= 0 && a21 == 1) && a17 == 1) && a20 == 1)) || (((a7 <= 0 && 14 <= a8) && a21 == 1) && a20 == 1) RESULT: Ultimate proved your program to be correct! [2021-10-16 02:35:51,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c6b4d96-0ea6-49c2-962e-0c0a90ebcdda/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...