./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.06.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.06.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH --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 57da589979fa53e6905993fed396e7e42d18c0f001f3b61822edb51c70b85655 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:27:57,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:27:57,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:27:57,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:27:57,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:27:57,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:27:57,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:27:57,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:27:57,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:27:57,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:27:57,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:27:57,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:27:57,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:27:57,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:27:57,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:27:57,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:27:57,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:27:57,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:27:57,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:27:57,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:27:57,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:27:57,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:27:57,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:27:57,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:27:57,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:27:57,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:27:57,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:27:57,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:27:57,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:27:57,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:27:57,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:27:57,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:27:57,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:27:57,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:27:57,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:27:57,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:27:57,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:27:57,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:27:57,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:27:57,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:27:57,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:27:57,853 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:27:57,908 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:27:57,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:27:57,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:27:57,911 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:27:57,911 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:27:57,912 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:27:57,912 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:27:57,912 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:27:57,919 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:27:57,920 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:27:57,920 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:27:57,920 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:27:57,920 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:27:57,921 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:27:57,921 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:27:57,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:27:57,923 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:27:57,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:27:57,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:27:57,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:27:57,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:27:57,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:27:57,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:27:57,926 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:27:57,926 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:27:57,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:27:57,926 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:27:57,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:27:57,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:27:57,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:27:57,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:27:57,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:27:57,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:27:57,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:27:57,930 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:27:57,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:27:57,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:27:57,930 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:27:57,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:27:57,931 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_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57da589979fa53e6905993fed396e7e42d18c0f001f3b61822edb51c70b85655 [2021-11-03 04:27:58,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:27:58,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:27:58,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:27:58,218 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:27:58,219 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:27:58,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/systemc/transmitter.06.cil.c [2021-11-03 04:27:58,285 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH/data/3c7d86b85/e3f9b0678390455aa65eea4f40b6eb51/FLAGdfabc3483 [2021-11-03 04:27:58,883 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:27:58,884 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/sv-benchmarks/c/systemc/transmitter.06.cil.c [2021-11-03 04:27:58,896 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH/data/3c7d86b85/e3f9b0678390455aa65eea4f40b6eb51/FLAGdfabc3483 [2021-11-03 04:27:59,214 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH/data/3c7d86b85/e3f9b0678390455aa65eea4f40b6eb51 [2021-11-03 04:27:59,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:27:59,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:27:59,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:27:59,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:27:59,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:27:59,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:27:59" (1/1) ... [2021-11-03 04:27:59,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b96e319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:59, skipping insertion in model container [2021-11-03 04:27:59,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:27:59" (1/1) ... [2021-11-03 04:27:59,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:27:59,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:27:59,466 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_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/sv-benchmarks/c/systemc/transmitter.06.cil.c[401,414] [2021-11-03 04:27:59,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:27:59,580 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:27:59,594 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_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/sv-benchmarks/c/systemc/transmitter.06.cil.c[401,414] [2021-11-03 04:27:59,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:27:59,684 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:27:59,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:59 WrapperNode [2021-11-03 04:27:59,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:27:59,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:27:59,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:27:59,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:27:59,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:59" (1/1) ... [2021-11-03 04:27:59,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:59" (1/1) ... [2021-11-03 04:27:59,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:27:59,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:27:59,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:27:59,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:27:59,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:59" (1/1) ... [2021-11-03 04:27:59,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:59" (1/1) ... [2021-11-03 04:27:59,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:59" (1/1) ... [2021-11-03 04:27:59,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:59" (1/1) ... [2021-11-03 04:27:59,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:59" (1/1) ... [2021-11-03 04:27:59,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:59" (1/1) ... [2021-11-03 04:27:59,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:59" (1/1) ... [2021-11-03 04:27:59,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:27:59,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:27:59,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:27:59,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:27:59,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:59" (1/1) ... [2021-11-03 04:27:59,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:28:00,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:28:00,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:28:00,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a111f4e-a5b3-48bc-b78a-5de8e11d3edd/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:28:00,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:28:00,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:28:00,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:28:00,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:28:03,262 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:28:03,262 INFO L299 CfgBuilder]: Removed 218 assume(true) statements. [2021-11-03 04:28:03,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:28:03 BoogieIcfgContainer [2021-11-03 04:28:03,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:28:03,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:28:03,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:28:03,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:28:03,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:27:59" (1/3) ... [2021-11-03 04:28:03,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7294cd9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:28:03, skipping insertion in model container [2021-11-03 04:28:03,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:59" (2/3) ... [2021-11-03 04:28:03,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7294cd9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:28:03, skipping insertion in model container [2021-11-03 04:28:03,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:28:03" (3/3) ... [2021-11-03 04:28:03,278 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.06.cil.c [2021-11-03 04:28:03,284 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:28:03,285 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:28:03,346 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:28:03,354 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:28:03,355 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:28:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand has 300 states, 298 states have (on average 1.5436241610738255) internal successors, (460), 299 states have internal predecessors, (460), 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) [2021-11-03 04:28:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:28:03,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:03,429 INFO L513 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] [2021-11-03 04:28:03,430 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:28:03,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:03,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1723376906, now seen corresponding path program 1 times [2021-11-03 04:28:03,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:28:03,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444762452] [2021-11-03 04:28:03,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:03,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:28:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:03,665 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:28:03,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444762452] [2021-11-03 04:28:03,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444762452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:03,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:03,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:28:03,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265469111] [2021-11-03 04:28:03,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:28:03,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:28:03,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:28:03,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:03,706 INFO L87 Difference]: Start difference. First operand has 300 states, 298 states have (on average 1.5436241610738255) internal successors, (460), 299 states have internal predecessors, (460), 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 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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) [2021-11-03 04:28:03,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:03,887 INFO L93 Difference]: Finished difference Result 859 states and 1314 transitions. [2021-11-03 04:28:03,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:28:03,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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 36 [2021-11-03 04:28:03,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:03,919 INFO L225 Difference]: With dead ends: 859 [2021-11-03 04:28:03,919 INFO L226 Difference]: Without dead ends: 557 [2021-11-03 04:28:03,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:03,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-03 04:28:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 528. [2021-11-03 04:28:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 1.5047438330170777) internal successors, (793), 527 states have internal predecessors, (793), 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) [2021-11-03 04:28:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 793 transitions. [2021-11-03 04:28:04,037 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 793 transitions. Word has length 36 [2021-11-03 04:28:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:04,037 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 793 transitions. [2021-11-03 04:28:04,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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) [2021-11-03 04:28:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 793 transitions. [2021-11-03 04:28:04,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:28:04,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:04,041 INFO L513 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] [2021-11-03 04:28:04,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:28:04,042 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:28:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash -671927817, now seen corresponding path program 1 times [2021-11-03 04:28:04,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:28:04,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424332250] [2021-11-03 04:28:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:04,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:28:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:04,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:28:04,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424332250] [2021-11-03 04:28:04,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424332250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:04,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:04,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:28:04,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997407060] [2021-11-03 04:28:04,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:04,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:28:04,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:04,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:04,134 INFO L87 Difference]: Start difference. First operand 528 states and 793 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-03 04:28:04,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:04,349 INFO L93 Difference]: Finished difference Result 1740 states and 2600 transitions. [2021-11-03 04:28:04,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:04,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 36 [2021-11-03 04:28:04,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:04,359 INFO L225 Difference]: With dead ends: 1740 [2021-11-03 04:28:04,359 INFO L226 Difference]: Without dead ends: 1221 [2021-11-03 04:28:04,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:28:04,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-11-03 04:28:04,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 955. [2021-11-03 04:28:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 1.4863731656184487) internal successors, (1418), 954 states have internal predecessors, (1418), 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) [2021-11-03 04:28:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1418 transitions. [2021-11-03 04:28:04,433 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1418 transitions. Word has length 36 [2021-11-03 04:28:04,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:04,433 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 1418 transitions. [2021-11-03 04:28:04,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-03 04:28:04,435 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1418 transitions. [2021-11-03 04:28:04,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:28:04,444 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:04,444 INFO L513 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] [2021-11-03 04:28:04,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:28:04,445 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:28:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:04,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1643602504, now seen corresponding path program 1 times [2021-11-03 04:28:04,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:28:04,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478941972] [2021-11-03 04:28:04,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:04,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:28:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:04,579 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:28:04,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478941972] [2021-11-03 04:28:04,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478941972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:04,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:04,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:28:04,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453512118] [2021-11-03 04:28:04,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:04,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:28:04,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:04,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:04,595 INFO L87 Difference]: Start difference. First operand 955 states and 1418 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-03 04:28:04,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:04,852 INFO L93 Difference]: Finished difference Result 3166 states and 4678 transitions. [2021-11-03 04:28:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:04,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 36 [2021-11-03 04:28:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:04,869 INFO L225 Difference]: With dead ends: 3166 [2021-11-03 04:28:04,869 INFO L226 Difference]: Without dead ends: 2223 [2021-11-03 04:28:04,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:28:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-11-03 04:28:04,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1744. [2021-11-03 04:28:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 1.46815834767642) internal successors, (2559), 1743 states have internal predecessors, (2559), 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) [2021-11-03 04:28:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2559 transitions. [2021-11-03 04:28:04,957 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2559 transitions. Word has length 36 [2021-11-03 04:28:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:04,958 INFO L470 AbstractCegarLoop]: Abstraction has 1744 states and 2559 transitions. [2021-11-03 04:28:04,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-03 04:28:04,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2559 transitions. [2021-11-03 04:28:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:28:04,962 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:04,963 INFO L513 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] [2021-11-03 04:28:04,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:28:04,963 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:28:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:04,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1004818025, now seen corresponding path program 1 times [2021-11-03 04:28:04,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:28:04,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974518778] [2021-11-03 04:28:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:04,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:28:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:05,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:28:05,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974518778] [2021-11-03 04:28:05,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974518778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:05,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:05,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:28:05,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919593946] [2021-11-03 04:28:05,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:05,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:28:05,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:05,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:05,065 INFO L87 Difference]: Start difference. First operand 1744 states and 2559 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-03 04:28:05,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:05,359 INFO L93 Difference]: Finished difference Result 5746 states and 8388 transitions. [2021-11-03 04:28:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:05,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 36 [2021-11-03 04:28:05,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:05,388 INFO L225 Difference]: With dead ends: 5746 [2021-11-03 04:28:05,389 INFO L226 Difference]: Without dead ends: 4021 [2021-11-03 04:28:05,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:28:05,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2021-11-03 04:28:05,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3195. [2021-11-03 04:28:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 3194 states have (on average 1.4502191609267376) internal successors, (4632), 3194 states have internal predecessors, (4632), 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) [2021-11-03 04:28:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 4632 transitions. [2021-11-03 04:28:05,628 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 4632 transitions. Word has length 36 [2021-11-03 04:28:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:05,628 INFO L470 AbstractCegarLoop]: Abstraction has 3195 states and 4632 transitions. [2021-11-03 04:28:05,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-03 04:28:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 4632 transitions. [2021-11-03 04:28:05,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:28:05,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:05,630 INFO L513 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] [2021-11-03 04:28:05,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 04:28:05,631 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:28:05,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:05,631 INFO L85 PathProgramCache]: Analyzing trace with hash -343484234, now seen corresponding path program 1 times [2021-11-03 04:28:05,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:28:05,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567480181] [2021-11-03 04:28:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:05,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:28:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:05,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:28:05,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567480181] [2021-11-03 04:28:05,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567480181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:05,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:05,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:28:05,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238322833] [2021-11-03 04:28:05,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:05,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:28:05,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:05,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:05,766 INFO L87 Difference]: Start difference. First operand 3195 states and 4632 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-03 04:28:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:06,183 INFO L93 Difference]: Finished difference Result 11293 states and 16431 transitions. [2021-11-03 04:28:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:06,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 36 [2021-11-03 04:28:06,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:06,239 INFO L225 Difference]: With dead ends: 11293 [2021-11-03 04:28:06,239 INFO L226 Difference]: Without dead ends: 8123 [2021-11-03 04:28:06,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8123 states. [2021-11-03 04:28:06,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8123 to 6095. [2021-11-03 04:28:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6095 states, 6094 states have (on average 1.4473252379389563) internal successors, (8820), 6094 states have internal predecessors, (8820), 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) [2021-11-03 04:28:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6095 states to 6095 states and 8820 transitions. [2021-11-03 04:28:06,588 INFO L78 Accepts]: Start accepts. Automaton has 6095 states and 8820 transitions. Word has length 36 [2021-11-03 04:28:06,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:06,589 INFO L470 AbstractCegarLoop]: Abstraction has 6095 states and 8820 transitions. [2021-11-03 04:28:06,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-03 04:28:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 6095 states and 8820 transitions. [2021-11-03 04:28:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-03 04:28:06,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:06,591 INFO L513 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] [2021-11-03 04:28:06,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 04:28:06,591 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:28:06,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:06,592 INFO L85 PathProgramCache]: Analyzing trace with hash -462766604, now seen corresponding path program 1 times [2021-11-03 04:28:06,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:28:06,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783807931] [2021-11-03 04:28:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:06,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:28:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:06,688 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:28:06,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783807931] [2021-11-03 04:28:06,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783807931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:06,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:06,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:28:06,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344201190] [2021-11-03 04:28:06,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:06,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:28:06,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:06,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:06,699 INFO L87 Difference]: Start difference. First operand 6095 states and 8820 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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) [2021-11-03 04:28:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:07,401 INFO L93 Difference]: Finished difference Result 21969 states and 31749 transitions. [2021-11-03 04:28:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:07,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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 37 [2021-11-03 04:28:07,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:07,558 INFO L225 Difference]: With dead ends: 21969 [2021-11-03 04:28:07,558 INFO L226 Difference]: Without dead ends: 15899 [2021-11-03 04:28:07,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:07,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15899 states. [2021-11-03 04:28:08,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15899 to 11203. [2021-11-03 04:28:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11203 states, 11202 states have (on average 1.44617032672737) internal successors, (16200), 11202 states have internal predecessors, (16200), 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) [2021-11-03 04:28:08,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11203 states to 11203 states and 16200 transitions. [2021-11-03 04:28:08,375 INFO L78 Accepts]: Start accepts. Automaton has 11203 states and 16200 transitions. Word has length 37 [2021-11-03 04:28:08,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:08,376 INFO L470 AbstractCegarLoop]: Abstraction has 11203 states and 16200 transitions. [2021-11-03 04:28:08,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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) [2021-11-03 04:28:08,377 INFO L276 IsEmpty]: Start isEmpty. Operand 11203 states and 16200 transitions. [2021-11-03 04:28:08,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-03 04:28:08,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:08,379 INFO L513 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] [2021-11-03 04:28:08,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 04:28:08,380 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:28:08,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash -312024174, now seen corresponding path program 1 times [2021-11-03 04:28:08,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:28:08,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911861634] [2021-11-03 04:28:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:08,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:28:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:08,477 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:28:08,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911861634] [2021-11-03 04:28:08,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911861634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:08,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:08,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:28:08,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112768019] [2021-11-03 04:28:08,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:28:08,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:28:08,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:28:08,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:08,480 INFO L87 Difference]: Start difference. First operand 11203 states and 16200 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 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) [2021-11-03 04:28:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:09,109 INFO L93 Difference]: Finished difference Result 27479 states and 39874 transitions. [2021-11-03 04:28:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:28:09,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 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 38 [2021-11-03 04:28:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:09,156 INFO L225 Difference]: With dead ends: 27479 [2021-11-03 04:28:09,156 INFO L226 Difference]: Without dead ends: 16301 [2021-11-03 04:28:09,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:09,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16301 states. [2021-11-03 04:28:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16301 to 16299. [2021-11-03 04:28:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16299 states, 16298 states have (on average 1.4504847220517856) internal successors, (23640), 16298 states have internal predecessors, (23640), 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) [2021-11-03 04:28:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16299 states to 16299 states and 23640 transitions. [2021-11-03 04:28:09,985 INFO L78 Accepts]: Start accepts. Automaton has 16299 states and 23640 transitions. Word has length 38 [2021-11-03 04:28:09,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:09,986 INFO L470 AbstractCegarLoop]: Abstraction has 16299 states and 23640 transitions. [2021-11-03 04:28:09,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 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) [2021-11-03 04:28:09,986 INFO L276 IsEmpty]: Start isEmpty. Operand 16299 states and 23640 transitions. [2021-11-03 04:28:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-03 04:28:09,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:09,987 INFO L513 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] [2021-11-03 04:28:09,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 04:28:09,988 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:28:09,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1958078119, now seen corresponding path program 1 times [2021-11-03 04:28:09,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:28:09,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488001276] [2021-11-03 04:28:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:09,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:28:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:10,032 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:28:10,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488001276] [2021-11-03 04:28:10,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488001276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:10,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:10,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:28:10,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609416138] [2021-11-03 04:28:10,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:28:10,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:28:10,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:28:10,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:10,035 INFO L87 Difference]: Start difference. First operand 16299 states and 23640 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 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) [2021-11-03 04:28:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:11,018 INFO L93 Difference]: Finished difference Result 45951 states and 66682 transitions. [2021-11-03 04:28:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:28:11,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 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 39 [2021-11-03 04:28:11,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:11,118 INFO L225 Difference]: With dead ends: 45951 [2021-11-03 04:28:11,118 INFO L226 Difference]: Without dead ends: 29677 [2021-11-03 04:28:11,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:11,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29677 states. [2021-11-03 04:28:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29677 to 29675. [2021-11-03 04:28:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29675 states, 29674 states have (on average 1.4482712138572487) internal successors, (42976), 29674 states have internal predecessors, (42976), 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) [2021-11-03 04:28:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29675 states to 29675 states and 42976 transitions. [2021-11-03 04:28:12,423 INFO L78 Accepts]: Start accepts. Automaton has 29675 states and 42976 transitions. Word has length 39 [2021-11-03 04:28:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:12,424 INFO L470 AbstractCegarLoop]: Abstraction has 29675 states and 42976 transitions. [2021-11-03 04:28:12,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 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) [2021-11-03 04:28:12,424 INFO L276 IsEmpty]: Start isEmpty. Operand 29675 states and 42976 transitions. [2021-11-03 04:28:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 04:28:12,426 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:12,426 INFO L513 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] [2021-11-03 04:28:12,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 04:28:12,426 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:28:12,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:12,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1109067753, now seen corresponding path program 1 times [2021-11-03 04:28:12,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:28:12,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094111219] [2021-11-03 04:28:12,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:12,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:28:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:12,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:28:12,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094111219] [2021-11-03 04:28:12,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094111219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:12,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:12,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:28:12,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468838124] [2021-11-03 04:28:12,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:12,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:28:12,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:12,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:12,478 INFO L87 Difference]: Start difference. First operand 29675 states and 42976 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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) [2021-11-03 04:28:14,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:14,624 INFO L93 Difference]: Finished difference Result 106257 states and 154131 transitions. [2021-11-03 04:28:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:14,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2021-11-03 04:28:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:14,814 INFO L225 Difference]: With dead ends: 106257 [2021-11-03 04:28:14,814 INFO L226 Difference]: Without dead ends: 76607 [2021-11-03 04:28:14,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:14,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76607 states. [2021-11-03 04:28:17,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76607 to 56091. [2021-11-03 04:28:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56091 states, 56090 states have (on average 1.4428240328044215) internal successors, (80928), 56090 states have internal predecessors, (80928), 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) [2021-11-03 04:28:17,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56091 states to 56091 states and 80928 transitions. [2021-11-03 04:28:17,279 INFO L78 Accepts]: Start accepts. Automaton has 56091 states and 80928 transitions. Word has length 40 [2021-11-03 04:28:17,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:17,279 INFO L470 AbstractCegarLoop]: Abstraction has 56091 states and 80928 transitions. [2021-11-03 04:28:17,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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) [2021-11-03 04:28:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 56091 states and 80928 transitions. [2021-11-03 04:28:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 04:28:17,281 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:17,281 INFO L513 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] [2021-11-03 04:28:17,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 04:28:17,282 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:28:17,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:17,282 INFO L85 PathProgramCache]: Analyzing trace with hash 185967009, now seen corresponding path program 1 times [2021-11-03 04:28:17,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:28:17,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637360481] [2021-11-03 04:28:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:17,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:28:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:17,604 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:28:17,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637360481] [2021-11-03 04:28:17,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637360481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:17,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:17,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:28:17,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328984839] [2021-11-03 04:28:17,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:28:17,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:28:17,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:28:17,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:17,623 INFO L87 Difference]: Start difference. First operand 56091 states and 80928 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 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) [2021-11-03 04:28:20,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:20,558 INFO L93 Difference]: Finished difference Result 166175 states and 238627 transitions. [2021-11-03 04:28:20,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:28:20,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 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 41 [2021-11-03 04:28:20,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:20,793 INFO L225 Difference]: With dead ends: 166175 [2021-11-03 04:28:20,793 INFO L226 Difference]: Without dead ends: 110106 [2021-11-03 04:28:20,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:21,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110106 states. [2021-11-03 04:28:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110106 to 109722. [2021-11-03 04:28:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109722 states, 109721 states have (on average 1.4153443734563118) internal successors, (155293), 109721 states have internal predecessors, (155293), 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) [2021-11-03 04:28:24,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109722 states to 109722 states and 155293 transitions. [2021-11-03 04:28:24,865 INFO L78 Accepts]: Start accepts. Automaton has 109722 states and 155293 transitions. Word has length 41 [2021-11-03 04:28:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:24,865 INFO L470 AbstractCegarLoop]: Abstraction has 109722 states and 155293 transitions. [2021-11-03 04:28:24,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 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) [2021-11-03 04:28:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 109722 states and 155293 transitions. [2021-11-03 04:28:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:28:24,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:24,880 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:28:24,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 04:28:24,880 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:28:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:24,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1071807335, now seen corresponding path program 1 times [2021-11-03 04:28:24,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:28:24,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666888741] [2021-11-03 04:28:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:24,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:28:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:24,927 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:28:24,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666888741] [2021-11-03 04:28:24,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666888741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:24,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:24,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:28:24,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347500745] [2021-11-03 04:28:24,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:28:24,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:28:24,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:28:24,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:24,930 INFO L87 Difference]: Start difference. First operand 109722 states and 155293 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:29,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:29,200 INFO L93 Difference]: Finished difference Result 208732 states and 298462 transitions. [2021-11-03 04:28:29,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:28:29,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 04:28:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:29,482 INFO L225 Difference]: With dead ends: 208732 [2021-11-03 04:28:29,482 INFO L226 Difference]: Without dead ends: 152666 [2021-11-03 04:28:29,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152666 states. [2021-11-03 04:28:33,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152666 to 118042. [2021-11-03 04:28:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118042 states, 118041 states have (on average 1.4305283757338552) internal successors, (168861), 118041 states have internal predecessors, (168861), 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) [2021-11-03 04:28:34,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118042 states to 118042 states and 168861 transitions. [2021-11-03 04:28:34,456 INFO L78 Accepts]: Start accepts. Automaton has 118042 states and 168861 transitions. Word has length 58 [2021-11-03 04:28:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:34,456 INFO L470 AbstractCegarLoop]: Abstraction has 118042 states and 168861 transitions. [2021-11-03 04:28:34,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 118042 states and 168861 transitions. [2021-11-03 04:28:34,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 04:28:34,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:34,590 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:34,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 04:28:34,590 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:28:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1162009142, now seen corresponding path program 1 times [2021-11-03 04:28:34,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:28:34,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247088880] [2021-11-03 04:28:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:34,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:28:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:28:34,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:28:34,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247088880] [2021-11-03 04:28:34,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247088880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:34,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:34,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:28:34,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423413299] [2021-11-03 04:28:34,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:28:34,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:28:34,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:28:34,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:34,683 INFO L87 Difference]: Start difference. First operand 118042 states and 168861 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) [2021-11-03 04:28:39,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:39,873 INFO L93 Difference]: Finished difference Result 289264 states and 413043 transitions. [2021-11-03 04:28:39,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:28:39,873 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 82 [2021-11-03 04:28:39,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:40,508 INFO L225 Difference]: With dead ends: 289264 [2021-11-03 04:28:40,508 INFO L226 Difference]: Without dead ends: 171227 [2021-11-03 04:28:40,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:40,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171227 states. [2021-11-03 04:28:46,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171227 to 170649. [2021-11-03 04:28:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170649 states, 170648 states have (on average 1.4155571703155032) internal successors, (241562), 170648 states have internal predecessors, (241562), 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) [2021-11-03 04:28:46,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170649 states to 170649 states and 241562 transitions. [2021-11-03 04:28:46,822 INFO L78 Accepts]: Start accepts. Automaton has 170649 states and 241562 transitions. Word has length 82 [2021-11-03 04:28:46,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:46,822 INFO L470 AbstractCegarLoop]: Abstraction has 170649 states and 241562 transitions. [2021-11-03 04:28:46,822 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) [2021-11-03 04:28:46,823 INFO L276 IsEmpty]: Start isEmpty. Operand 170649 states and 241562 transitions. [2021-11-03 04:28:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 04:28:46,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:46,926 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:46,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 04:28:46,927 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:28:46,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:46,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1609091678, now seen corresponding path program 1 times [2021-11-03 04:28:46,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:28:46,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821258248] [2021-11-03 04:28:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:46,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:28:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:28:46,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:28:46,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821258248] [2021-11-03 04:28:46,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821258248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:46,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:46,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:28:46,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063523313] [2021-11-03 04:28:46,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:28:46,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:28:46,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:28:46,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:46,982 INFO L87 Difference]: Start difference. First operand 170649 states and 241562 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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)