./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF --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 b2d817c779a7c88ce14310f494c47ad6ae04ac82c2c2c295ca0b97645ed08cbd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:26:09,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:26:09,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:26:09,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:26:09,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:26:09,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:26:09,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:26:09,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:26:09,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:26:09,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:26:09,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:26:09,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:26:09,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:26:09,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:26:09,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:26:09,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:26:09,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:26:09,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:26:09,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:26:09,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:26:09,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:26:09,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:26:09,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:26:09,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:26:09,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:26:09,845 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:26:09,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:26:09,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:26:09,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:26:09,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:26:09,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:26:09,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:26:09,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:26:09,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:26:09,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:26:09,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:26:09,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:26:09,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:26:09,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:26:09,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:26:09,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:26:09,865 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:26:09,923 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:26:09,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:26:09,925 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:26:09,925 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:26:09,926 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:26:09,926 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:26:09,926 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:26:09,926 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:26:09,926 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:26:09,927 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:26:09,928 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:26:09,928 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:26:09,929 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:26:09,929 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:26:09,929 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:26:09,929 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:26:09,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:26:09,931 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:26:09,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:26:09,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:26:09,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:26:09,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:26:09,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:26:09,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:26:09,932 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:26:09,933 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:26:09,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:26:09,933 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:26:09,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:26:09,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:26:09,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:26:09,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:26:09,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:26:09,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:26:09,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:26:09,937 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:26:09,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:26:09,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:26:09,938 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:26:09,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:26:09,938 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_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2d817c779a7c88ce14310f494c47ad6ae04ac82c2c2c295ca0b97645ed08cbd [2021-11-12 23:26:10,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:26:10,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:26:10,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:26:10,357 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:26:10,358 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:26:10,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.10.cil-2.c [2021-11-12 23:26:10,450 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/data/d32251f83/347e4df3438947109a5655e6df453a70/FLAG2cf3b35ec [2021-11-12 23:26:11,714 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:26:11,715 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/sv-benchmarks/c/combinations/Problem05_label40+token_ring.10.cil-2.c [2021-11-12 23:26:11,779 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/data/d32251f83/347e4df3438947109a5655e6df453a70/FLAG2cf3b35ec [2021-11-12 23:26:11,919 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/data/d32251f83/347e4df3438947109a5655e6df453a70 [2021-11-12 23:26:11,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:26:11,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:26:11,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:26:11,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:26:11,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:26:11,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:26:11" (1/1) ... [2021-11-12 23:26:11,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c2ed4ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:11, skipping insertion in model container [2021-11-12 23:26:11,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:26:11" (1/1) ... [2021-11-12 23:26:11,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:26:12,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:26:14,928 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_f53a3c8b-b457-4c13-b645-903822d0f51f/sv-benchmarks/c/combinations/Problem05_label40+token_ring.10.cil-2.c[377069,377082] [2021-11-12 23:26:14,964 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_f53a3c8b-b457-4c13-b645-903822d0f51f/sv-benchmarks/c/combinations/Problem05_label40+token_ring.10.cil-2.c[383339,383352] [2021-11-12 23:26:15,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:26:15,334 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:26:16,641 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_f53a3c8b-b457-4c13-b645-903822d0f51f/sv-benchmarks/c/combinations/Problem05_label40+token_ring.10.cil-2.c[377069,377082] [2021-11-12 23:26:16,652 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_f53a3c8b-b457-4c13-b645-903822d0f51f/sv-benchmarks/c/combinations/Problem05_label40+token_ring.10.cil-2.c[383339,383352] [2021-11-12 23:26:16,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:26:16,848 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:26:16,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:16 WrapperNode [2021-11-12 23:26:16,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:26:16,850 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:26:16,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:26:16,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:26:16,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:16" (1/1) ... [2021-11-12 23:26:16,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:16" (1/1) ... [2021-11-12 23:26:17,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:26:17,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:26:17,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:26:17,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:26:17,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:16" (1/1) ... [2021-11-12 23:26:17,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:16" (1/1) ... [2021-11-12 23:26:17,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:16" (1/1) ... [2021-11-12 23:26:17,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:16" (1/1) ... [2021-11-12 23:26:17,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:16" (1/1) ... [2021-11-12 23:26:17,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:16" (1/1) ... [2021-11-12 23:26:17,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:16" (1/1) ... [2021-11-12 23:26:17,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:26:17,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:26:17,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:26:17,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:26:17,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:16" (1/1) ... [2021-11-12 23:26:17,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:26:18,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:26:18,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:26:18,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:26:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:26:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-12 23:26:18,079 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-12 23:26:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-12 23:26:18,079 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-12 23:26:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-12 23:26:18,079 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-12 23:26:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-12 23:26:18,080 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-12 23:26:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-12 23:26:18,080 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-12 23:26:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-12 23:26:18,080 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-12 23:26:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:26:18,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:26:18,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:26:29,180 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:26:29,181 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-12 23:26:29,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:26:29 BoogieIcfgContainer [2021-11-12 23:26:29,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:26:29,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:26:29,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:26:29,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:26:29,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:26:11" (1/3) ... [2021-11-12 23:26:29,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b64f374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:26:29, skipping insertion in model container [2021-11-12 23:26:29,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:16" (2/3) ... [2021-11-12 23:26:29,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b64f374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:26:29, skipping insertion in model container [2021-11-12 23:26:29,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:26:29" (3/3) ... [2021-11-12 23:26:29,199 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.10.cil-2.c [2021-11-12 23:26:29,205 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:26:29,205 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:26:29,277 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:26:29,286 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 [2021-11-12 23:26:29,286 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:26:29,352 INFO L276 IsEmpty]: Start isEmpty. Operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-12 23:26:29,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 23:26:29,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:29,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:29,363 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1106411911, now seen corresponding path program 1 times [2021-11-12 23:26:29,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:29,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956544217] [2021-11-12 23:26:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:29,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:29,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:29,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956544217] [2021-11-12 23:26:29,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956544217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:29,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:29,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:26:29,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316815332] [2021-11-12 23:26:29,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:29,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:26:29,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:29,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:26:29,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:26:29,891 INFO L87 Difference]: Start difference. First operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:26:30,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:30,975 INFO L93 Difference]: Finished difference Result 3767 states and 7315 transitions. [2021-11-12 23:26:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:26:30,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-11-12 23:26:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:31,012 INFO L225 Difference]: With dead ends: 3767 [2021-11-12 23:26:31,013 INFO L226 Difference]: Without dead ends: 1957 [2021-11-12 23:26:31,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:26:31,033 INFO L933 BasicCegarLoop]: 3451 mSDtfsCounter, 3713 mSDsluCounter, 3657 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 594.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.95ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 823.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:31,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3713 Valid, 6812 Invalid, 708 Unknown, 0 Unchecked, 40.95ms Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 823.24ms Time] [2021-11-12 23:26:31,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-11-12 23:26:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1956. [2021-11-12 23:26:31,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1898 states have (on average 1.9262381454162276) internal successors, (3656), 1901 states have internal predecessors, (3656), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2021-11-12 23:26:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3744 transitions. [2021-11-12 23:26:31,205 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3744 transitions. Word has length 61 [2021-11-12 23:26:31,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:31,206 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 3744 transitions. [2021-11-12 23:26:31,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:26:31,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3744 transitions. [2021-11-12 23:26:31,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:26:31,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:31,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:26:31,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:26:31,220 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:31,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:31,221 INFO L85 PathProgramCache]: Analyzing trace with hash -63143501, now seen corresponding path program 1 times [2021-11-12 23:26:31,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:31,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752870627] [2021-11-12 23:26:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:31,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:26:31,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:31,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752870627] [2021-11-12 23:26:31,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752870627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:31,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094439804] [2021-11-12 23:26:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:31,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:31,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:26:31,594 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:26:31,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:26:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:31,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:26:31,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:26:32,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:26:32,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094439804] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:32,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:26:32,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:26:32,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814821257] [2021-11-12 23:26:32,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:32,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:32,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:32,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:32,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:26:32,523 INFO L87 Difference]: Start difference. First operand 1956 states and 3744 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:26:33,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:33,152 INFO L93 Difference]: Finished difference Result 2569 states and 4695 transitions. [2021-11-12 23:26:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:26:33,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-12 23:26:33,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:33,192 INFO L225 Difference]: With dead ends: 2569 [2021-11-12 23:26:33,193 INFO L226 Difference]: Without dead ends: 2259 [2021-11-12 23:26:33,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:26:33,199 INFO L933 BasicCegarLoop]: 3309 mSDtfsCounter, 3471 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 381.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.45ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 458.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:33,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3471 Valid, 3504 Invalid, 306 Unknown, 0 Unchecked, 20.45ms Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 458.84ms Time] [2021-11-12 23:26:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-11-12 23:26:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2255. [2021-11-12 23:26:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2147 states have (on average 1.8765719608756404) internal successors, (4029), 2151 states have internal predecessors, (4029), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2021-11-12 23:26:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4193 transitions. [2021-11-12 23:26:33,352 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4193 transitions. Word has length 122 [2021-11-12 23:26:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:33,355 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 4193 transitions. [2021-11-12 23:26:33,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:26:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4193 transitions. [2021-11-12 23:26:33,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:26:33,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:33,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:26:33,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:33,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:33,584 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:33,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2094607341, now seen corresponding path program 1 times [2021-11-12 23:26:33,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:33,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064810109] [2021-11-12 23:26:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:33,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:26:33,732 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:33,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064810109] [2021-11-12 23:26:33,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064810109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:33,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134960902] [2021-11-12 23:26:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:33,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:33,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:26:33,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:26:33,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:26:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:33,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:26:33,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:26:34,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:26:34,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134960902] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:34,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:26:34,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:26:34,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535562143] [2021-11-12 23:26:34,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:34,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:34,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:34,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:34,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:26:34,551 INFO L87 Difference]: Start difference. First operand 2255 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:26:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:35,101 INFO L93 Difference]: Finished difference Result 3460 states and 6056 transitions. [2021-11-12 23:26:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:26:35,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-12 23:26:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:35,123 INFO L225 Difference]: With dead ends: 3460 [2021-11-12 23:26:35,123 INFO L226 Difference]: Without dead ends: 2851 [2021-11-12 23:26:35,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:26:35,129 INFO L933 BasicCegarLoop]: 3308 mSDtfsCounter, 3483 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 327.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.77ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 414.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:35,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3483 Valid, 3503 Invalid, 306 Unknown, 0 Unchecked, 13.77ms Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 414.54ms Time] [2021-11-12 23:26:35,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-11-12 23:26:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2845. [2021-11-12 23:26:35,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2639 states have (on average 1.8048503220917014) internal successors, (4763), 2645 states have internal predecessors, (4763), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2021-11-12 23:26:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 5075 transitions. [2021-11-12 23:26:35,246 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 5075 transitions. Word has length 122 [2021-11-12 23:26:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:35,247 INFO L470 AbstractCegarLoop]: Abstraction has 2845 states and 5075 transitions. [2021-11-12 23:26:35,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:26:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 5075 transitions. [2021-11-12 23:26:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:26:35,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:35,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:26:35,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:35,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:35,480 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:35,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:35,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1682478707, now seen corresponding path program 1 times [2021-11-12 23:26:35,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:35,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000202825] [2021-11-12 23:26:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:35,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:26:35,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:35,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000202825] [2021-11-12 23:26:35,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000202825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:35,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514936134] [2021-11-12 23:26:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:35,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:35,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:26:35,612 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:26:35,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:26:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:35,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:26:35,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:26:36,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:26:36,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514936134] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:36,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:26:36,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:26:36,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285577780] [2021-11-12 23:26:36,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:36,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:36,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:36,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:26:36,424 INFO L87 Difference]: Start difference. First operand 2845 states and 5075 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:26:37,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:37,139 INFO L93 Difference]: Finished difference Result 5218 states and 8728 transitions. [2021-11-12 23:26:37,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:26:37,141 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-12 23:26:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:37,186 INFO L225 Difference]: With dead ends: 5218 [2021-11-12 23:26:37,186 INFO L226 Difference]: Without dead ends: 4019 [2021-11-12 23:26:37,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:26:37,201 INFO L933 BasicCegarLoop]: 3296 mSDtfsCounter, 3489 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 428.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.51ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 517.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:37,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3489 Valid, 3491 Invalid, 303 Unknown, 0 Unchecked, 16.51ms Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 517.76ms Time] [2021-11-12 23:26:37,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2021-11-12 23:26:37,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 4009. [2021-11-12 23:26:37,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3611 states have (on average 1.7189144281362503) internal successors, (6207), 3621 states have internal predecessors, (6207), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2021-11-12 23:26:37,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 6807 transitions. [2021-11-12 23:26:37,579 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 6807 transitions. Word has length 122 [2021-11-12 23:26:37,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:37,580 INFO L470 AbstractCegarLoop]: Abstraction has 4009 states and 6807 transitions. [2021-11-12 23:26:37,580 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:26:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 6807 transitions. [2021-11-12 23:26:37,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:26:37,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:37,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:26:37,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:37,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:37,808 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2011631827, now seen corresponding path program 1 times [2021-11-12 23:26:37,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:37,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302612401] [2021-11-12 23:26:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:37,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:26:37,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:37,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302612401] [2021-11-12 23:26:37,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302612401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:37,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22724282] [2021-11-12 23:26:37,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:37,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:37,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:26:37,958 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:26:37,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:26:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:26:38,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:26:38,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:26:38,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22724282] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:38,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:26:38,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:26:38,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922210985] [2021-11-12 23:26:38,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:38,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:38,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:38,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:38,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:26:38,800 INFO L87 Difference]: Start difference. First operand 4009 states and 6807 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:26:39,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:39,474 INFO L93 Difference]: Finished difference Result 8686 states and 13972 transitions. [2021-11-12 23:26:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:26:39,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-12 23:26:39,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:39,533 INFO L225 Difference]: With dead ends: 8686 [2021-11-12 23:26:39,534 INFO L226 Difference]: Without dead ends: 6323 [2021-11-12 23:26:39,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:26:39,553 INFO L933 BasicCegarLoop]: 3306 mSDtfsCounter, 3492 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 366.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3492 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.25ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 436.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:39,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3492 Valid, 3501 Invalid, 306 Unknown, 0 Unchecked, 14.25ms Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 436.94ms Time] [2021-11-12 23:26:39,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2021-11-12 23:26:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6305. [2021-11-12 23:26:40,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6305 states, 5531 states have (on average 1.6356897486892064) internal successors, (9047), 5549 states have internal predecessors, (9047), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2021-11-12 23:26:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6305 states to 6305 states and 10207 transitions. [2021-11-12 23:26:40,083 INFO L78 Accepts]: Start accepts. Automaton has 6305 states and 10207 transitions. Word has length 122 [2021-11-12 23:26:40,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:40,084 INFO L470 AbstractCegarLoop]: Abstraction has 6305 states and 10207 transitions. [2021-11-12 23:26:40,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:26:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 6305 states and 10207 transitions. [2021-11-12 23:26:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:26:40,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:40,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:26:40,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:40,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:40,319 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:40,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:40,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1893074317, now seen corresponding path program 1 times [2021-11-12 23:26:40,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:40,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394451994] [2021-11-12 23:26:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:40,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:26:40,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:40,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394451994] [2021-11-12 23:26:40,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394451994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:40,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620106660] [2021-11-12 23:26:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:40,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:40,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:26:40,424 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:26:40,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:26:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:40,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:26:40,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:26:40,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:26:41,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620106660] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:41,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:26:41,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:26:41,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565056326] [2021-11-12 23:26:41,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:41,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:41,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:41,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:41,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:26:41,048 INFO L87 Difference]: Start difference. First operand 6305 states and 10207 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:26:41,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:41,938 INFO L93 Difference]: Finished difference Result 15526 states and 24260 transitions. [2021-11-12 23:26:41,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:26:41,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-12 23:26:41,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:42,043 INFO L225 Difference]: With dead ends: 15526 [2021-11-12 23:26:42,046 INFO L226 Difference]: Without dead ends: 10867 [2021-11-12 23:26:42,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:26:42,080 INFO L933 BasicCegarLoop]: 3278 mSDtfsCounter, 3477 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 382.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.70ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 454.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:42,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3477 Valid, 3473 Invalid, 303 Unknown, 0 Unchecked, 15.70ms Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 454.58ms Time] [2021-11-12 23:26:42,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10867 states. [2021-11-12 23:26:42,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10867 to 10833. [2021-11-12 23:26:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10833 states, 9323 states have (on average 1.569344631556366) internal successors, (14631), 9357 states have internal predecessors, (14631), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2021-11-12 23:26:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10833 states to 10833 states and 16879 transitions. [2021-11-12 23:26:42,718 INFO L78 Accepts]: Start accepts. Automaton has 10833 states and 16879 transitions. Word has length 122 [2021-11-12 23:26:42,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:42,721 INFO L470 AbstractCegarLoop]: Abstraction has 10833 states and 16879 transitions. [2021-11-12 23:26:42,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:26:42,721 INFO L276 IsEmpty]: Start isEmpty. Operand 10833 states and 16879 transitions. [2021-11-12 23:26:42,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:26:42,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:42,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:26:42,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:42,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53a3c8b-b457-4c13-b645-903822d0f51f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:42,976 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:42,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:42,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1407517907, now seen corresponding path program 1 times [2021-11-12 23:26:42,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:42,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442684432] [2021-11-12 23:26:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:42,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:26:43,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:43,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442684432] [2021-11-12 23:26:43,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442684432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:43,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:43,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:26:43,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584398717] [2021-11-12 23:26:43,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:43,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:26:43,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:43,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:26:43,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:26:43,171 INFO L87 Difference]: Start difference. First operand 10833 states and 16879 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:26:45,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:45,104 INFO L93 Difference]: Finished difference Result 26597 states and 40353 transitions. [2021-11-12 23:26:45,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:26:45,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2021-11-12 23:26:45,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:45,193 INFO L225 Difference]: With dead ends: 26597 [2021-11-12 23:26:45,193 INFO L226 Difference]: Without dead ends: 17411 [2021-11-12 23:26:45,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:26:45,235 INFO L933 BasicCegarLoop]: 3301 mSDtfsCounter, 4078 mSDsluCounter, 7080 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 764.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4084 SdHoareTripleChecker+Valid, 9870 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.36ms SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 931.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:45,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4084 Valid, 9870 Invalid, 1045 Unknown, 0 Unchecked, 45.36ms Time], IncrementalHoareTripleChecker [130 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 931.90ms Time] [2021-11-12 23:26:45,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17411 states. [2021-11-12 23:26:45,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17411 to 15297. [2021-11-12 23:26:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15297 states, 13051 states have (on average 1.5391157765688452) internal successors, (20087), 13101 states have internal predecessors, (20087), 1668 states have call successors, (1668), 576 states have call predecessors, (1668), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2021-11-12 23:26:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15297 states to 15297 states and 23423 transitions. [2021-11-12 23:26:46,034 INFO L78 Accepts]: Start accepts. Automaton has 15297 states and 23423 transitions. Word has length 122 [2021-11-12 23:26:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:46,035 INFO L470 AbstractCegarLoop]: Abstraction has 15297 states and 23423 transitions. [2021-11-12 23:26:46,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:26:46,036 INFO L276 IsEmpty]: Start isEmpty. Operand 15297 states and 23423 transitions. [2021-11-12 23:26:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:26:46,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:46,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:26:46,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:26:46,076 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:46,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:46,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1985471236, now seen corresponding path program 1 times [2021-11-12 23:26:46,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:46,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606891659] [2021-11-12 23:26:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:46,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:26:46,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:46,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606891659] [2021-11-12 23:26:46,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606891659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:46,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:46,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:26:46,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125386482] [2021-11-12 23:26:46,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:46,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:26:46,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:26:46,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:26:46,238 INFO L87 Difference]: Start difference. First operand 15297 states and 23423 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:26:48,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:48,507 INFO L93 Difference]: Finished difference Result 36973 states and 55793 transitions. [2021-11-12 23:26:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:26:48,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2021-11-12 23:26:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:48,635 INFO L225 Difference]: With dead ends: 36973 [2021-11-12 23:26:48,635 INFO L226 Difference]: Without dead ends: 23323 [2021-11-12 23:26:48,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:26:48,698 INFO L933 BasicCegarLoop]: 3273 mSDtfsCounter, 3994 mSDsluCounter, 6996 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 740.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4000 SdHoareTripleChecker+Valid, 9771 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.15ms SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 900.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:48,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4000 Valid, 9771 Invalid, 1035 Unknown, 0 Unchecked, 42.15ms Time], IncrementalHoareTripleChecker [142 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 900.84ms Time] [2021-11-12 23:26:48,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23323 states. [2021-11-12 23:26:50,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23323 to 21929. [2021-11-12 23:26:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 18587 states have (on average 1.5149835906816593) internal successors, (28159), 18661 states have internal predecessors, (28159), 2476 states have call successors, (2476), 864 states have call predecessors, (2476), 864 states have return successors, (2476), 2404 states have call predecessors, (2476), 2476 states have call successors, (2476) [2021-11-12 23:26:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 33111 transitions. [2021-11-12 23:26:50,608 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 33111 transitions. Word has length 123 [2021-11-12 23:26:50,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:50,610 INFO L470 AbstractCegarLoop]: Abstraction has 21929 states and 33111 transitions. [2021-11-12 23:26:50,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:26:50,610 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 33111 transitions. [2021-11-12 23:26:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 23:26:50,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:50,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:26:50,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:26:50,650 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:50,651 INFO L85 PathProgramCache]: Analyzing trace with hash -681111049, now seen corresponding path program 1 times [2021-11-12 23:26:50,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:50,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218404992] [2021-11-12 23:26:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:50,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:26:50,800 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:50,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218404992] [2021-11-12 23:26:50,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218404992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:50,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:50,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:26:50,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304083252] [2021-11-12 23:26:50,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:50,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:26:50,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:50,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:26:50,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:26:50,803 INFO L87 Difference]: Start difference. First operand 21929 states and 33111 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:26:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:53,728 INFO L93 Difference]: Finished difference Result 72237 states and 107490 transitions. [2021-11-12 23:26:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:26:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2021-11-12 23:26:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:54,158 INFO L225 Difference]: With dead ends: 72237 [2021-11-12 23:26:54,158 INFO L226 Difference]: Without dead ends: 51955 [2021-11-12 23:26:54,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:26:54,214 INFO L933 BasicCegarLoop]: 3283 mSDtfsCounter, 4162 mSDsluCounter, 10418 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 770.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4181 SdHoareTripleChecker+Valid, 12957 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.69ms SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 938.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:54,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4181 Valid, 12957 Invalid, 1325 Unknown, 0 Unchecked, 32.69ms Time], IncrementalHoareTripleChecker [134 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 938.15ms Time] [2021-11-12 23:26:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51955 states. [2021-11-12 23:26:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51955 to 41345. [2021-11-12 23:26:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41345 states, 34811 states have (on average 1.4866277900663583) internal successors, (51751), 34957 states have internal predecessors, (51751), 4804 states have call successors, (4804), 1728 states have call predecessors, (4804), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2021-11-12 23:26:57,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41345 states to 41345 states and 61359 transitions. [2021-11-12 23:26:57,112 INFO L78 Accepts]: Start accepts. Automaton has 41345 states and 61359 transitions. Word has length 124 [2021-11-12 23:26:57,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:57,112 INFO L470 AbstractCegarLoop]: Abstraction has 41345 states and 61359 transitions. [2021-11-12 23:26:57,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:26:57,113 INFO L276 IsEmpty]: Start isEmpty. Operand 41345 states and 61359 transitions. [2021-11-12 23:26:57,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 23:26:57,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:57,188 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:26:57,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:26:57,188 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:57,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:57,189 INFO L85 PathProgramCache]: Analyzing trace with hash 69417316, now seen corresponding path program 1 times [2021-11-12 23:26:57,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:57,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021917219] [2021-11-12 23:26:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:57,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:26:57,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:57,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021917219] [2021-11-12 23:26:57,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021917219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:57,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:57,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:26:57,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574868280] [2021-11-12 23:26:57,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:57,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:26:57,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:57,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:26:57,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:26:57,306 INFO L87 Difference]: Start difference. First operand 41345 states and 61359 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:27:01,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:01,516 INFO L93 Difference]: Finished difference Result 108861 states and 161033 transitions. [2021-11-12 23:27:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:27:01,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2021-11-12 23:27:01,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:01,850 INFO L225 Difference]: With dead ends: 108861 [2021-11-12 23:27:01,851 INFO L226 Difference]: Without dead ends: 69163 [2021-11-12 23:27:02,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:27:02,001 INFO L933 BasicCegarLoop]: 3273 mSDtfsCounter, 4081 mSDsluCounter, 7044 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 766.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 9811 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.49ms SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1029.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:02,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4087 Valid, 9811 Invalid, 1043 Unknown, 0 Unchecked, 20.49ms Time], IncrementalHoareTripleChecker [142 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 1029.80ms Time] [2021-11-12 23:27:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69163 states. [2021-11-12 23:27:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69163 to 60617. [2021-11-12 23:27:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60617 states, 50891 states have (on average 1.4734039417578746) internal successors, (74983), 51109 states have internal predecessors, (74983), 7132 states have call successors, (7132), 2592 states have call predecessors, (7132), 2592 states have return successors, (7132), 6916 states have call predecessors, (7132), 7132 states have call successors, (7132) [2021-11-12 23:27:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60617 states to 60617 states and 89247 transitions. [2021-11-12 23:27:05,974 INFO L78 Accepts]: Start accepts. Automaton has 60617 states and 89247 transitions. Word has length 125 [2021-11-12 23:27:05,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:05,975 INFO L470 AbstractCegarLoop]: Abstraction has 60617 states and 89247 transitions. [2021-11-12 23:27:05,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:27:05,975 INFO L276 IsEmpty]: Start isEmpty. Operand 60617 states and 89247 transitions. [2021-11-12 23:27:06,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 23:27:06,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:06,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:27:06,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:27:06,067 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:27:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1631091825, now seen corresponding path program 1 times [2021-11-12 23:27:06,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:27:06,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891896287] [2021-11-12 23:27:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:27:06,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:27:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:27:06,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:27:06,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891896287] [2021-11-12 23:27:06,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891896287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:06,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:06,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:27:06,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342441369] [2021-11-12 23:27:06,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:06,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:27:06,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:27:06,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:27:06,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:27:06,241 INFO L87 Difference]: Start difference. First operand 60617 states and 89247 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:27:12,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:12,671 INFO L93 Difference]: Finished difference Result 157785 states and 232457 transitions. [2021-11-12 23:27:12,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:27:12,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2021-11-12 23:27:12,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:13,230 INFO L225 Difference]: With dead ends: 157785 [2021-11-12 23:27:13,231 INFO L226 Difference]: Without dead ends: 98815 [2021-11-12 23:27:13,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:27:13,445 INFO L933 BasicCegarLoop]: 3273 mSDtfsCounter, 4006 mSDsluCounter, 10454 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 847.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4012 SdHoareTripleChecker+Valid, 12983 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.75ms SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1036.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:13,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4012 Valid, 12983 Invalid, 1330 Unknown, 0 Unchecked, 29.75ms Time], IncrementalHoareTripleChecker [142 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 1036.04ms Time] [2021-11-12 23:27:13,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98815 states. [2021-11-12 23:27:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98815 to 89237. [2021-11-12 23:27:19,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89237 states, 74759 states have (on average 1.4623924878609933) internal successors, (109327), 75085 states have internal predecessors, (109327), 10588 states have call successors, (10588), 3888 states have call predecessors, (10588), 3888 states have return successors, (10588), 10264 states have call predecessors, (10588), 10588 states have call successors, (10588) [2021-11-12 23:27:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89237 states to 89237 states and 130503 transitions. [2021-11-12 23:27:19,473 INFO L78 Accepts]: Start accepts. Automaton has 89237 states and 130503 transitions. Word has length 126 [2021-11-12 23:27:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:19,474 INFO L470 AbstractCegarLoop]: Abstraction has 89237 states and 130503 transitions. [2021-11-12 23:27:19,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:27:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 89237 states and 130503 transitions. [2021-11-12 23:27:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:27:19,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:19,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:27:19,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:27:19,585 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:27:19,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:19,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1125020092, now seen corresponding path program 1 times [2021-11-12 23:27:19,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:27:19,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490855717] [2021-11-12 23:27:19,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:27:19,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:27:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:27:19,719 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:27:19,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490855717] [2021-11-12 23:27:19,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490855717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:19,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:19,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:27:19,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478069121] [2021-11-12 23:27:19,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:19,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:27:19,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:27:19,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:27:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:27:19,723 INFO L87 Difference]: Start difference. First operand 89237 states and 130503 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)