./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac5b3ca7f0cbf86065d9b51b42b205731847de35ffee4bc60ed412b43213bc2b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:23:45,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:23:45,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:23:45,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:23:45,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:23:45,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:23:45,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:23:45,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:23:45,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:23:45,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:23:45,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:23:45,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:23:45,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:23:45,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:23:45,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:23:45,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:23:45,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:23:45,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:23:45,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:23:45,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:23:45,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:23:45,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:23:45,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:23:45,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:23:45,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:23:45,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:23:45,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:23:45,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:23:45,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:23:45,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:23:45,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:23:45,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:23:45,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:23:45,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:23:45,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:23:45,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:23:45,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:23:45,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:23:45,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:23:45,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:23:45,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:23:45,832 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:23:45,881 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:23:45,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:23:45,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:23:45,883 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:23:45,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:23:45,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:23:45,886 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:23:45,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:23:45,886 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:23:45,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:23:45,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:23:45,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:23:45,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:23:45,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:23:45,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:23:45,890 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:23:45,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:23:45,890 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:23:45,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:23:45,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:23:45,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:23:45,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:23:45,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:23:45,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:23:45,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:23:45,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:23:45,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:23:45,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:23:45,894 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:23:45,894 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:23:45,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:23:45,895 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:23:45,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac5b3ca7f0cbf86065d9b51b42b205731847de35ffee4bc60ed412b43213bc2b [2021-11-07 07:23:46,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:23:46,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:23:46,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:23:46,301 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:23:46,302 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:23:46,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c [2021-11-07 07:23:46,380 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/data/3025db97d/bfc63cbd68a1465380423c7f762e886d/FLAGfe2da357b [2021-11-07 07:23:47,323 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:23:47,359 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c [2021-11-07 07:23:47,404 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/data/3025db97d/bfc63cbd68a1465380423c7f762e886d/FLAGfe2da357b [2021-11-07 07:23:47,789 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/data/3025db97d/bfc63cbd68a1465380423c7f762e886d [2021-11-07 07:23:47,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:23:47,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:23:47,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:23:47,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:23:47,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:23:47,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:23:47" (1/1) ... [2021-11-07 07:23:47,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73c944b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:47, skipping insertion in model container [2021-11-07 07:23:47,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:23:47" (1/1) ... [2021-11-07 07:23:47,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:23:47,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:23:48,465 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_86a4a41f-521d-4a3e-9e10-16bde10196a5/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c[6412,6425] [2021-11-07 07:23:48,550 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_86a4a41f-521d-4a3e-9e10-16bde10196a5/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c[13917,13930] [2021-11-07 07:23:50,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:23:50,069 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:23:50,135 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_86a4a41f-521d-4a3e-9e10-16bde10196a5/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c[6412,6425] [2021-11-07 07:23:50,175 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_86a4a41f-521d-4a3e-9e10-16bde10196a5/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c[13917,13930] [2021-11-07 07:23:50,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:23:50,922 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:23:50,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:50 WrapperNode [2021-11-07 07:23:50,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:23:50,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:23:50,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:23:50,924 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:23:50,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:50" (1/1) ... [2021-11-07 07:23:51,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:50" (1/1) ... [2021-11-07 07:23:51,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:23:51,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:23:51,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:23:51,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:23:51,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:50" (1/1) ... [2021-11-07 07:23:51,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:50" (1/1) ... [2021-11-07 07:23:51,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:50" (1/1) ... [2021-11-07 07:23:51,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:50" (1/1) ... [2021-11-07 07:23:51,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:50" (1/1) ... [2021-11-07 07:23:51,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:50" (1/1) ... [2021-11-07 07:23:51,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:50" (1/1) ... [2021-11-07 07:23:52,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:23:52,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:23:52,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:23:52,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:23:52,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:50" (1/1) ... [2021-11-07 07:23:52,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:23:52,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:23:52,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:23:52,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:23:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:23:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:23:52,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:23:52,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:23:58,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:23:58,170 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-11-07 07:23:58,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:23:58 BoogieIcfgContainer [2021-11-07 07:23:58,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:23:58,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:23:58,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:23:58,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:23:58,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:23:47" (1/3) ... [2021-11-07 07:23:58,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c369cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:23:58, skipping insertion in model container [2021-11-07 07:23:58,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:50" (2/3) ... [2021-11-07 07:23:58,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c369cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:23:58, skipping insertion in model container [2021-11-07 07:23:58,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:23:58" (3/3) ... [2021-11-07 07:23:58,218 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c [2021-11-07 07:23:58,225 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:23:58,240 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 07:23:58,321 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:23:58,328 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=PETRI_NET, 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 [2021-11-07 07:23:58,329 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 07:23:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:58,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:23:58,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:58,385 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:58,386 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:58,393 INFO L85 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2021-11-07 07:23:58,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:58,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962028581] [2021-11-07 07:23:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:58,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:58,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:58,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962028581] [2021-11-07 07:23:58,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962028581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:58,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:58,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:23:58,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226881948] [2021-11-07 07:23:58,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:23:58,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:58,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:23:58,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:23:58,680 INFO L87 Difference]: Start difference. First operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:58,771 INFO L93 Difference]: Finished difference Result 1734 states and 3292 transitions. [2021-11-07 07:23:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:23:58,773 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 07:23:58,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:58,798 INFO L225 Difference]: With dead ends: 1734 [2021-11-07 07:23:58,798 INFO L226 Difference]: Without dead ends: 812 [2021-11-07 07:23:58,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:23:58,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-07 07:23:58,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2021-11-07 07:23:58,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8925925925925926) internal successors, (1533), 811 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2021-11-07 07:23:58,957 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2021-11-07 07:23:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:58,958 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2021-11-07 07:23:58,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:58,959 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2021-11-07 07:23:58,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:23:58,962 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:58,962 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:58,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:23:58,963 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:58,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:58,964 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2021-11-07 07:23:58,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:58,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842288081] [2021-11-07 07:23:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:58,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:59,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:59,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842288081] [2021-11-07 07:23:59,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842288081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:59,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:59,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:23:59,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080624583] [2021-11-07 07:23:59,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:23:59,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:59,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:23:59,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:23:59,151 INFO L87 Difference]: Start difference. First operand 812 states and 1533 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:59,278 INFO L93 Difference]: Finished difference Result 888 states and 1649 transitions. [2021-11-07 07:23:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:23:59,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 07:23:59,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:59,289 INFO L225 Difference]: With dead ends: 888 [2021-11-07 07:23:59,290 INFO L226 Difference]: Without dead ends: 848 [2021-11-07 07:23:59,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:23:59,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-11-07 07:23:59,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 812. [2021-11-07 07:23:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8728395061728396) internal successors, (1517), 811 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2021-11-07 07:23:59,342 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2021-11-07 07:23:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:59,342 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2021-11-07 07:23:59,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2021-11-07 07:23:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 07:23:59,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:59,354 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:59,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:23:59,355 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:59,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2021-11-07 07:23:59,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:59,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956676906] [2021-11-07 07:23:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:59,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:59,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:59,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956676906] [2021-11-07 07:23:59,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956676906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:59,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:59,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:23:59,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749388053] [2021-11-07 07:23:59,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:23:59,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:23:59,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:23:59,527 INFO L87 Difference]: Start difference. First operand 812 states and 1517 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:59,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:59,573 INFO L93 Difference]: Finished difference Result 878 states and 1619 transitions. [2021-11-07 07:23:59,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:23:59,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 07:23:59,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:59,582 INFO L225 Difference]: With dead ends: 878 [2021-11-07 07:23:59,582 INFO L226 Difference]: Without dead ends: 842 [2021-11-07 07:23:59,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:23:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-11-07 07:23:59,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2021-11-07 07:23:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 838 states have (on average 1.8627684964200477) internal successors, (1561), 839 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1561 transitions. [2021-11-07 07:23:59,619 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1561 transitions. Word has length 41 [2021-11-07 07:23:59,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:59,621 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1561 transitions. [2021-11-07 07:23:59,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1561 transitions. [2021-11-07 07:23:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 07:23:59,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:59,629 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:59,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:23:59,630 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:59,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2021-11-07 07:23:59,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:59,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050462386] [2021-11-07 07:23:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:59,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:59,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:59,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:59,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050462386] [2021-11-07 07:23:59,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050462386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:59,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:59,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:23:59,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064510140] [2021-11-07 07:23:59,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:23:59,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:59,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:23:59,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:23:59,789 INFO L87 Difference]: Start difference. First operand 840 states and 1561 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:59,971 INFO L93 Difference]: Finished difference Result 1224 states and 2161 transitions. [2021-11-07 07:23:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:23:59,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 07:23:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:59,981 INFO L225 Difference]: With dead ends: 1224 [2021-11-07 07:23:59,982 INFO L226 Difference]: Without dead ends: 1160 [2021-11-07 07:23:59,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:23:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-11-07 07:24:00,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 902. [2021-11-07 07:24:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 900 states have (on average 1.84) internal successors, (1656), 901 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1656 transitions. [2021-11-07 07:24:00,027 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1656 transitions. Word has length 41 [2021-11-07 07:24:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:00,027 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1656 transitions. [2021-11-07 07:24:00,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:00,028 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1656 transitions. [2021-11-07 07:24:00,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 07:24:00,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:00,030 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:00,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:24:00,031 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:00,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:00,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2021-11-07 07:24:00,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:00,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963248016] [2021-11-07 07:24:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:00,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:00,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:00,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963248016] [2021-11-07 07:24:00,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963248016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:00,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:00,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:24:00,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363424171] [2021-11-07 07:24:00,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:24:00,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:00,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:24:00,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:24:00,204 INFO L87 Difference]: Start difference. First operand 902 states and 1656 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:00,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:00,258 INFO L93 Difference]: Finished difference Result 1089 states and 1943 transitions. [2021-11-07 07:24:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:24:00,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 07:24:00,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:00,267 INFO L225 Difference]: With dead ends: 1089 [2021-11-07 07:24:00,267 INFO L226 Difference]: Without dead ends: 963 [2021-11-07 07:24:00,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:24:00,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-07 07:24:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2021-11-07 07:24:00,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8185610010427529) internal successors, (1744), 960 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1744 transitions. [2021-11-07 07:24:00,313 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1744 transitions. Word has length 43 [2021-11-07 07:24:00,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:00,315 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1744 transitions. [2021-11-07 07:24:00,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1744 transitions. [2021-11-07 07:24:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 07:24:00,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:00,317 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:00,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:24:00,318 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:00,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:00,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2021-11-07 07:24:00,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:00,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563996957] [2021-11-07 07:24:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:00,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:00,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:00,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563996957] [2021-11-07 07:24:00,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563996957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:00,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:00,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:24:00,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219785131] [2021-11-07 07:24:00,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:24:00,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:00,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:24:00,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:24:00,553 INFO L87 Difference]: Start difference. First operand 961 states and 1744 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:00,675 INFO L93 Difference]: Finished difference Result 1146 states and 2026 transitions. [2021-11-07 07:24:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:24:00,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 07:24:00,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:00,691 INFO L225 Difference]: With dead ends: 1146 [2021-11-07 07:24:00,691 INFO L226 Difference]: Without dead ends: 963 [2021-11-07 07:24:00,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:24:00,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-07 07:24:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2021-11-07 07:24:00,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8154327424400416) internal successors, (1741), 960 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1741 transitions. [2021-11-07 07:24:00,731 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1741 transitions. Word has length 43 [2021-11-07 07:24:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:00,732 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1741 transitions. [2021-11-07 07:24:00,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1741 transitions. [2021-11-07 07:24:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 07:24:00,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:00,735 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:00,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:24:00,736 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:00,736 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2021-11-07 07:24:00,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:00,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498824363] [2021-11-07 07:24:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:00,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:00,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:00,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498824363] [2021-11-07 07:24:00,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498824363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:00,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:00,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:24:00,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066399158] [2021-11-07 07:24:00,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:24:00,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:00,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:24:00,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:24:00,848 INFO L87 Difference]: Start difference. First operand 961 states and 1741 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:00,898 INFO L93 Difference]: Finished difference Result 1291 states and 2237 transitions. [2021-11-07 07:24:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:24:00,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 07:24:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:00,910 INFO L225 Difference]: With dead ends: 1291 [2021-11-07 07:24:00,910 INFO L226 Difference]: Without dead ends: 1108 [2021-11-07 07:24:00,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:24:00,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-11-07 07:24:00,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1106. [2021-11-07 07:24:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1104 states have (on average 1.7681159420289856) internal successors, (1952), 1105 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1952 transitions. [2021-11-07 07:24:00,963 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1952 transitions. Word has length 43 [2021-11-07 07:24:00,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:00,963 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 1952 transitions. [2021-11-07 07:24:00,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:00,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1952 transitions. [2021-11-07 07:24:00,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 07:24:00,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:00,965 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:00,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:24:00,965 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:00,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:00,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2021-11-07 07:24:00,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:00,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600309331] [2021-11-07 07:24:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:00,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:01,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:01,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600309331] [2021-11-07 07:24:01,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600309331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:01,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:01,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:24:01,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333853596] [2021-11-07 07:24:01,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:24:01,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:01,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:24:01,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:24:01,034 INFO L87 Difference]: Start difference. First operand 1106 states and 1952 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:01,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:01,107 INFO L93 Difference]: Finished difference Result 1690 states and 2810 transitions. [2021-11-07 07:24:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:24:01,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 07:24:01,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:01,118 INFO L225 Difference]: With dead ends: 1690 [2021-11-07 07:24:01,118 INFO L226 Difference]: Without dead ends: 1362 [2021-11-07 07:24:01,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:24:01,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-11-07 07:24:01,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1360. [2021-11-07 07:24:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1358 states have (on average 1.6995581737849779) internal successors, (2308), 1359 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2308 transitions. [2021-11-07 07:24:01,184 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2308 transitions. Word has length 43 [2021-11-07 07:24:01,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:01,184 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 2308 transitions. [2021-11-07 07:24:01,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:01,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2308 transitions. [2021-11-07 07:24:01,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:24:01,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:01,186 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:01,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:24:01,186 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:01,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:01,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2021-11-07 07:24:01,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:01,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659709880] [2021-11-07 07:24:01,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:01,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:01,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:01,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659709880] [2021-11-07 07:24:01,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659709880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:01,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:01,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:24:01,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836077400] [2021-11-07 07:24:01,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:24:01,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:01,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:24:01,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:24:01,322 INFO L87 Difference]: Start difference. First operand 1360 states and 2308 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:01,465 INFO L93 Difference]: Finished difference Result 1883 states and 3036 transitions. [2021-11-07 07:24:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:24:01,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 07:24:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:01,480 INFO L225 Difference]: With dead ends: 1883 [2021-11-07 07:24:01,480 INFO L226 Difference]: Without dead ends: 1881 [2021-11-07 07:24:01,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:24:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-11-07 07:24:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1408. [2021-11-07 07:24:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1406 states have (on average 1.6728307254623045) internal successors, (2352), 1407 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2352 transitions. [2021-11-07 07:24:01,567 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2352 transitions. Word has length 44 [2021-11-07 07:24:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:01,568 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 2352 transitions. [2021-11-07 07:24:01,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:01,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2352 transitions. [2021-11-07 07:24:01,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:24:01,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:01,570 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:01,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:24:01,572 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:01,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:01,573 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2021-11-07 07:24:01,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:01,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954059156] [2021-11-07 07:24:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:01,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 07:24:01,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:01,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954059156] [2021-11-07 07:24:01,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954059156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:01,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:01,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:24:01,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330853076] [2021-11-07 07:24:01,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:24:01,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:01,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:24:01,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:24:01,656 INFO L87 Difference]: Start difference. First operand 1408 states and 2352 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:01,956 INFO L93 Difference]: Finished difference Result 3436 states and 5200 transitions. [2021-11-07 07:24:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:24:01,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 07:24:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:01,976 INFO L225 Difference]: With dead ends: 3436 [2021-11-07 07:24:01,976 INFO L226 Difference]: Without dead ends: 2806 [2021-11-07 07:24:01,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:24:01,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2021-11-07 07:24:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2036. [2021-11-07 07:24:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2034 states have (on average 1.5870206489675516) internal successors, (3228), 2035 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:02,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 3228 transitions. [2021-11-07 07:24:02,114 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 3228 transitions. Word has length 64 [2021-11-07 07:24:02,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:02,115 INFO L470 AbstractCegarLoop]: Abstraction has 2036 states and 3228 transitions. [2021-11-07 07:24:02,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:02,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 3228 transitions. [2021-11-07 07:24:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:24:02,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:02,117 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:02,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:24:02,118 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:02,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:02,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2021-11-07 07:24:02,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:02,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218910003] [2021-11-07 07:24:02,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:02,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:24:02,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:02,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218910003] [2021-11-07 07:24:02,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218910003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:02,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:02,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:24:02,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259853142] [2021-11-07 07:24:02,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:24:02,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:24:02,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:24:02,198 INFO L87 Difference]: Start difference. First operand 2036 states and 3228 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:02,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:02,463 INFO L93 Difference]: Finished difference Result 4064 states and 6076 transitions. [2021-11-07 07:24:02,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:24:02,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 07:24:02,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:02,492 INFO L225 Difference]: With dead ends: 4064 [2021-11-07 07:24:02,492 INFO L226 Difference]: Without dead ends: 3434 [2021-11-07 07:24:02,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:24:02,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-11-07 07:24:02,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 2980. [2021-11-07 07:24:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2978 states have (on average 1.5218267293485561) internal successors, (4532), 2979 states have internal predecessors, (4532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 4532 transitions. [2021-11-07 07:24:02,710 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 4532 transitions. Word has length 64 [2021-11-07 07:24:02,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:02,710 INFO L470 AbstractCegarLoop]: Abstraction has 2980 states and 4532 transitions. [2021-11-07 07:24:02,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:02,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 4532 transitions. [2021-11-07 07:24:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:24:02,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:02,713 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:24:02,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 07:24:02,714 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:02,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:02,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2021-11-07 07:24:02,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:02,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637314631] [2021-11-07 07:24:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:02,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:24:02,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:02,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637314631] [2021-11-07 07:24:02,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637314631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:02,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:02,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:24:02,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941307259] [2021-11-07 07:24:02,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:24:02,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:02,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:24:02,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:24:02,805 INFO L87 Difference]: Start difference. First operand 2980 states and 4532 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:03,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:03,196 INFO L93 Difference]: Finished difference Result 4332 states and 6456 transitions. [2021-11-07 07:24:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:24:03,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 07:24:03,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:03,224 INFO L225 Difference]: With dead ends: 4332 [2021-11-07 07:24:03,224 INFO L226 Difference]: Without dead ends: 3882 [2021-11-07 07:24:03,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:24:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2021-11-07 07:24:03,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3428. [2021-11-07 07:24:03,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3426 states have (on average 1.5072971395213077) internal successors, (5164), 3427 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 5164 transitions. [2021-11-07 07:24:03,517 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 5164 transitions. Word has length 64 [2021-11-07 07:24:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:03,517 INFO L470 AbstractCegarLoop]: Abstraction has 3428 states and 5164 transitions. [2021-11-07 07:24:03,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:03,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 5164 transitions. [2021-11-07 07:24:03,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:24:03,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:03,520 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:24:03,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:24:03,521 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:03,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:03,521 INFO L85 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2021-11-07 07:24:03,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:03,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483447936] [2021-11-07 07:24:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:03,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:03,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:03,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483447936] [2021-11-07 07:24:03,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483447936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:03,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:03,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:24:03,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662704380] [2021-11-07 07:24:03,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:24:03,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:24:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:24:03,608 INFO L87 Difference]: Start difference. First operand 3428 states and 5164 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:03,854 INFO L93 Difference]: Finished difference Result 6080 states and 8866 transitions. [2021-11-07 07:24:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:24:03,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 07:24:03,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:03,904 INFO L225 Difference]: With dead ends: 6080 [2021-11-07 07:24:03,905 INFO L226 Difference]: Without dead ends: 3430 [2021-11-07 07:24:03,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:24:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2021-11-07 07:24:04,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 3428. [2021-11-07 07:24:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3426 states have (on average 1.4927028604786923) internal successors, (5114), 3427 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 5114 transitions. [2021-11-07 07:24:04,217 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 5114 transitions. Word has length 65 [2021-11-07 07:24:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:04,218 INFO L470 AbstractCegarLoop]: Abstraction has 3428 states and 5114 transitions. [2021-11-07 07:24:04,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 5114 transitions. [2021-11-07 07:24:04,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:24:04,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:04,221 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:04,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 07:24:04,221 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:04,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:04,222 INFO L85 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2021-11-07 07:24:04,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:04,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459948735] [2021-11-07 07:24:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:04,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:04,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:04,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459948735] [2021-11-07 07:24:04,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459948735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:04,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:04,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:24:04,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114134461] [2021-11-07 07:24:04,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:24:04,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:04,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:24:04,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:24:04,283 INFO L87 Difference]: Start difference. First operand 3428 states and 5114 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:04,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:04,414 INFO L93 Difference]: Finished difference Result 4756 states and 6941 transitions. [2021-11-07 07:24:04,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:24:04,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 07:24:04,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:04,421 INFO L225 Difference]: With dead ends: 4756 [2021-11-07 07:24:04,421 INFO L226 Difference]: Without dead ends: 2106 [2021-11-07 07:24:04,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:24:04,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-11-07 07:24:04,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2104. [2021-11-07 07:24:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2102 states have (on average 1.5528068506184587) internal successors, (3264), 2103 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3264 transitions. [2021-11-07 07:24:04,592 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3264 transitions. Word has length 65 [2021-11-07 07:24:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:04,592 INFO L470 AbstractCegarLoop]: Abstraction has 2104 states and 3264 transitions. [2021-11-07 07:24:04,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3264 transitions. [2021-11-07 07:24:04,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:24:04,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:04,594 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:04,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 07:24:04,595 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:04,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:04,595 INFO L85 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2021-11-07 07:24:04,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:04,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257590116] [2021-11-07 07:24:04,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:04,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:24:04,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:04,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257590116] [2021-11-07 07:24:04,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257590116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:04,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400461044] [2021-11-07 07:24:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:04,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:24:04,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:24:04,743 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:24:04,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:24:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:04,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:24:04,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:24:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:05,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400461044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:05,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:24:05,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 9 [2021-11-07 07:24:05,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81467454] [2021-11-07 07:24:05,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:24:05,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:05,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:24:05,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:24:05,442 INFO L87 Difference]: Start difference. First operand 2104 states and 3264 transitions. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:05,819 INFO L93 Difference]: Finished difference Result 4118 states and 6014 transitions. [2021-11-07 07:24:05,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:24:05,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 07:24:05,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:05,829 INFO L225 Difference]: With dead ends: 4118 [2021-11-07 07:24:05,829 INFO L226 Difference]: Without dead ends: 3108 [2021-11-07 07:24:05,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:24:05,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2021-11-07 07:24:06,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 2910. [2021-11-07 07:24:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2910 states, 2908 states have (on average 1.485557083906465) internal successors, (4320), 2909 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:06,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4320 transitions. [2021-11-07 07:24:06,026 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4320 transitions. Word has length 65 [2021-11-07 07:24:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:06,027 INFO L470 AbstractCegarLoop]: Abstraction has 2910 states and 4320 transitions. [2021-11-07 07:24:06,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4320 transitions. [2021-11-07 07:24:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:24:06,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:06,029 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:06,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:24:06,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:24:06,252 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:06,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:06,253 INFO L85 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2021-11-07 07:24:06,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:06,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682754525] [2021-11-07 07:24:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:06,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:06,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:06,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682754525] [2021-11-07 07:24:06,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682754525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:06,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933973905] [2021-11-07 07:24:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:06,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:24:06,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:24:06,507 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:24:06,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:24:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:06,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:24:06,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:24:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:08,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933973905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:08,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:24:08,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-07 07:24:08,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878030956] [2021-11-07 07:24:08,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:24:08,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:08,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:24:08,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:24:08,437 INFO L87 Difference]: Start difference. First operand 2910 states and 4320 transitions. Second operand has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:16,379 INFO L93 Difference]: Finished difference Result 27514 states and 36822 transitions. [2021-11-07 07:24:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-07 07:24:16,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 07:24:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:16,457 INFO L225 Difference]: With dead ends: 27514 [2021-11-07 07:24:16,457 INFO L226 Difference]: Without dead ends: 25382 [2021-11-07 07:24:16,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3358 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1545, Invalid=8355, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 07:24:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25382 states. [2021-11-07 07:24:17,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25382 to 10884. [2021-11-07 07:24:17,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10884 states, 10882 states have (on average 1.3531519941187282) internal successors, (14725), 10883 states have internal predecessors, (14725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10884 states to 10884 states and 14725 transitions. [2021-11-07 07:24:17,545 INFO L78 Accepts]: Start accepts. Automaton has 10884 states and 14725 transitions. Word has length 66 [2021-11-07 07:24:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:17,545 INFO L470 AbstractCegarLoop]: Abstraction has 10884 states and 14725 transitions. [2021-11-07 07:24:17,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:17,546 INFO L276 IsEmpty]: Start isEmpty. Operand 10884 states and 14725 transitions. [2021-11-07 07:24:17,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:24:17,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:17,548 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:17,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:24:17,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:24:17,776 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:17,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:17,777 INFO L85 PathProgramCache]: Analyzing trace with hash 616171932, now seen corresponding path program 1 times [2021-11-07 07:24:17,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:17,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690409385] [2021-11-07 07:24:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:17,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:17,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:17,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690409385] [2021-11-07 07:24:17,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690409385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:17,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93388447] [2021-11-07 07:24:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:17,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:24:17,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:24:17,993 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:24:18,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:24:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:18,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:24:18,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:24:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:19,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93388447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:19,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:24:19,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-07 07:24:19,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316914531] [2021-11-07 07:24:19,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:24:19,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:19,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:24:19,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:24:19,452 INFO L87 Difference]: Start difference. First operand 10884 states and 14725 transitions. Second operand has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 17 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:23,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:23,487 INFO L93 Difference]: Finished difference Result 53678 states and 70061 transitions. [2021-11-07 07:24:23,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:24:23,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 17 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 07:24:23,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:23,611 INFO L225 Difference]: With dead ends: 53678 [2021-11-07 07:24:23,612 INFO L226 Difference]: Without dead ends: 43572 [2021-11-07 07:24:23,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=345, Invalid=987, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 07:24:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43572 states. [2021-11-07 07:24:26,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43572 to 28320. [2021-11-07 07:24:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28320 states, 28318 states have (on average 1.3119923723426796) internal successors, (37153), 28319 states have internal predecessors, (37153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28320 states to 28320 states and 37153 transitions. [2021-11-07 07:24:26,238 INFO L78 Accepts]: Start accepts. Automaton has 28320 states and 37153 transitions. Word has length 66 [2021-11-07 07:24:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:26,238 INFO L470 AbstractCegarLoop]: Abstraction has 28320 states and 37153 transitions. [2021-11-07 07:24:26,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 17 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:26,239 INFO L276 IsEmpty]: Start isEmpty. Operand 28320 states and 37153 transitions. [2021-11-07 07:24:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:24:26,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:26,242 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:26,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:24:26,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:24:26,456 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:26,457 INFO L85 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2021-11-07 07:24:26,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:26,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364749162] [2021-11-07 07:24:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:26,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:26,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:26,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364749162] [2021-11-07 07:24:26,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364749162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:26,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:26,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:24:26,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810928761] [2021-11-07 07:24:26,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:24:26,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:26,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:24:26,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:24:26,521 INFO L87 Difference]: Start difference. First operand 28320 states and 37153 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:27,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:27,740 INFO L93 Difference]: Finished difference Result 40316 states and 52683 transitions. [2021-11-07 07:24:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:24:27,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 07:24:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:27,775 INFO L225 Difference]: With dead ends: 40316 [2021-11-07 07:24:27,775 INFO L226 Difference]: Without dead ends: 12774 [2021-11-07 07:24:27,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:24:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12774 states. [2021-11-07 07:24:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12774 to 11722. [2021-11-07 07:24:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11722 states, 11720 states have (on average 1.3175767918088737) internal successors, (15442), 11721 states have internal predecessors, (15442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11722 states to 11722 states and 15442 transitions. [2021-11-07 07:24:29,357 INFO L78 Accepts]: Start accepts. Automaton has 11722 states and 15442 transitions. Word has length 66 [2021-11-07 07:24:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:29,358 INFO L470 AbstractCegarLoop]: Abstraction has 11722 states and 15442 transitions. [2021-11-07 07:24:29,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 11722 states and 15442 transitions. [2021-11-07 07:24:29,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:24:29,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:29,361 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:29,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 07:24:29,362 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:29,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2021-11-07 07:24:29,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:29,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138899230] [2021-11-07 07:24:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:29,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:24:29,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:29,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138899230] [2021-11-07 07:24:29,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138899230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:29,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:29,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:24:29,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076309859] [2021-11-07 07:24:29,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:24:29,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:29,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:24:29,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:24:29,440 INFO L87 Difference]: Start difference. First operand 11722 states and 15442 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:30,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:30,172 INFO L93 Difference]: Finished difference Result 20787 states and 27089 transitions. [2021-11-07 07:24:30,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:24:30,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 07:24:30,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:30,192 INFO L225 Difference]: With dead ends: 20787 [2021-11-07 07:24:30,192 INFO L226 Difference]: Without dead ends: 9920 [2021-11-07 07:24:30,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:24:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9920 states. [2021-11-07 07:24:30,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9920 to 9920. [2021-11-07 07:24:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9920 states, 9918 states have (on average 1.3026819923371646) internal successors, (12920), 9919 states have internal predecessors, (12920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9920 states to 9920 states and 12920 transitions. [2021-11-07 07:24:30,904 INFO L78 Accepts]: Start accepts. Automaton has 9920 states and 12920 transitions. Word has length 66 [2021-11-07 07:24:30,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:30,905 INFO L470 AbstractCegarLoop]: Abstraction has 9920 states and 12920 transitions. [2021-11-07 07:24:30,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:30,905 INFO L276 IsEmpty]: Start isEmpty. Operand 9920 states and 12920 transitions. [2021-11-07 07:24:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:24:30,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:30,908 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:30,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 07:24:30,909 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:30,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:30,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2021-11-07 07:24:30,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:30,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307579781] [2021-11-07 07:24:30,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:30,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 07:24:31,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:31,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307579781] [2021-11-07 07:24:31,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307579781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:31,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:31,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:24:31,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436311156] [2021-11-07 07:24:31,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:24:31,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:31,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:24:31,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:24:31,082 INFO L87 Difference]: Start difference. First operand 9920 states and 12920 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:31,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:31,767 INFO L93 Difference]: Finished difference Result 16697 states and 21456 transitions. [2021-11-07 07:24:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:24:31,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 07:24:31,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:31,781 INFO L225 Difference]: With dead ends: 16697 [2021-11-07 07:24:31,782 INFO L226 Difference]: Without dead ends: 7668 [2021-11-07 07:24:31,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:24:31,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7668 states. [2021-11-07 07:24:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7668 to 7668. [2021-11-07 07:24:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7668 states, 7666 states have (on average 1.2981998434646491) internal successors, (9952), 7667 states have internal predecessors, (9952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7668 states to 7668 states and 9952 transitions. [2021-11-07 07:24:32,469 INFO L78 Accepts]: Start accepts. Automaton has 7668 states and 9952 transitions. Word has length 66 [2021-11-07 07:24:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:32,470 INFO L470 AbstractCegarLoop]: Abstraction has 7668 states and 9952 transitions. [2021-11-07 07:24:32,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:32,470 INFO L276 IsEmpty]: Start isEmpty. Operand 7668 states and 9952 transitions. [2021-11-07 07:24:32,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:24:32,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:32,472 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:32,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 07:24:32,473 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:32,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2021-11-07 07:24:32,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:32,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418906230] [2021-11-07 07:24:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:32,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:24:32,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:32,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418906230] [2021-11-07 07:24:32,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418906230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:32,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:32,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:24:32,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664083394] [2021-11-07 07:24:32,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:24:32,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:32,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:24:32,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:24:32,539 INFO L87 Difference]: Start difference. First operand 7668 states and 9952 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:33,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:33,477 INFO L93 Difference]: Finished difference Result 13018 states and 16609 transitions. [2021-11-07 07:24:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:24:33,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 07:24:33,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:33,489 INFO L225 Difference]: With dead ends: 13018 [2021-11-07 07:24:33,490 INFO L226 Difference]: Without dead ends: 6164 [2021-11-07 07:24:33,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:24:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6164 states. [2021-11-07 07:24:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6164 to 6164. [2021-11-07 07:24:34,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6164 states, 6162 states have (on average 1.305744888023369) internal successors, (8046), 6163 states have internal predecessors, (8046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6164 states to 6164 states and 8046 transitions. [2021-11-07 07:24:34,204 INFO L78 Accepts]: Start accepts. Automaton has 6164 states and 8046 transitions. Word has length 66 [2021-11-07 07:24:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:34,205 INFO L470 AbstractCegarLoop]: Abstraction has 6164 states and 8046 transitions. [2021-11-07 07:24:34,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 6164 states and 8046 transitions. [2021-11-07 07:24:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 07:24:34,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:34,208 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:34,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 07:24:34,209 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:34,209 INFO L85 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2021-11-07 07:24:34,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:34,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851063631] [2021-11-07 07:24:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:34,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:34,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:34,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851063631] [2021-11-07 07:24:34,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851063631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:34,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703197911] [2021-11-07 07:24:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:34,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:24:34,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:24:34,777 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:24:34,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:24:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:35,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:24:35,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:24:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:37,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703197911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:37,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:24:37,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-11-07 07:24:37,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836471202] [2021-11-07 07:24:37,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:24:37,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:37,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:24:37,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:24:37,240 INFO L87 Difference]: Start difference. First operand 6164 states and 8046 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:40,056 INFO L93 Difference]: Finished difference Result 9821 states and 12517 transitions. [2021-11-07 07:24:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:24:40,057 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 07:24:40,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:40,066 INFO L225 Difference]: With dead ends: 9821 [2021-11-07 07:24:40,067 INFO L226 Difference]: Without dead ends: 7570 [2021-11-07 07:24:40,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=341, Invalid=1219, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:24:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7570 states. [2021-11-07 07:24:40,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7570 to 5442. [2021-11-07 07:24:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5442 states, 5440 states have (on average 1.3185661764705883) internal successors, (7173), 5441 states have internal predecessors, (7173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5442 states to 5442 states and 7173 transitions. [2021-11-07 07:24:40,643 INFO L78 Accepts]: Start accepts. Automaton has 5442 states and 7173 transitions. Word has length 67 [2021-11-07 07:24:40,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:40,644 INFO L470 AbstractCegarLoop]: Abstraction has 5442 states and 7173 transitions. [2021-11-07 07:24:40,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 5442 states and 7173 transitions. [2021-11-07 07:24:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 07:24:40,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:40,646 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:40,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:24:40,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:24:40,860 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:40,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1641009586, now seen corresponding path program 1 times [2021-11-07 07:24:40,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:40,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440191040] [2021-11-07 07:24:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:40,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:41,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:41,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440191040] [2021-11-07 07:24:41,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440191040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:41,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814050994] [2021-11-07 07:24:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:41,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:24:41,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:24:41,358 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:24:41,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:24:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:41,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:24:41,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:24:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:43,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814050994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:43,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:24:43,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-07 07:24:43,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044196367] [2021-11-07 07:24:43,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 07:24:43,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:43,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 07:24:43,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:24:43,984 INFO L87 Difference]: Start difference. First operand 5442 states and 7173 transitions. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:46,758 INFO L93 Difference]: Finished difference Result 10178 states and 13217 transitions. [2021-11-07 07:24:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:24:46,759 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 07:24:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:46,769 INFO L225 Difference]: With dead ends: 10178 [2021-11-07 07:24:46,770 INFO L226 Difference]: Without dead ends: 7924 [2021-11-07 07:24:46,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=421, Invalid=1471, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:24:46,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7924 states. [2021-11-07 07:24:47,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7924 to 4414. [2021-11-07 07:24:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4414 states, 4412 states have (on average 1.3451949229374434) internal successors, (5935), 4413 states have internal predecessors, (5935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4414 states to 4414 states and 5935 transitions. [2021-11-07 07:24:47,378 INFO L78 Accepts]: Start accepts. Automaton has 4414 states and 5935 transitions. Word has length 67 [2021-11-07 07:24:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:47,379 INFO L470 AbstractCegarLoop]: Abstraction has 4414 states and 5935 transitions. [2021-11-07 07:24:47,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4414 states and 5935 transitions. [2021-11-07 07:24:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 07:24:47,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:47,381 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:47,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:24:47,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 07:24:47,590 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:47,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:47,590 INFO L85 PathProgramCache]: Analyzing trace with hash 531431905, now seen corresponding path program 1 times [2021-11-07 07:24:47,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:47,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59199657] [2021-11-07 07:24:47,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:47,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:47,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:47,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59199657] [2021-11-07 07:24:47,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59199657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:47,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:47,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:24:47,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178386079] [2021-11-07 07:24:47,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:24:47,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:47,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:24:47,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:24:47,675 INFO L87 Difference]: Start difference. First operand 4414 states and 5935 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:56,123 INFO L93 Difference]: Finished difference Result 6669 states and 10244 transitions. [2021-11-07 07:24:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:24:56,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 07:24:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:56,130 INFO L225 Difference]: With dead ends: 6669 [2021-11-07 07:24:56,130 INFO L226 Difference]: Without dead ends: 5916 [2021-11-07 07:24:56,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:24:56,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5916 states. [2021-11-07 07:24:56,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5916 to 5916. [2021-11-07 07:24:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5916 states, 5914 states have (on average 1.3376733175515725) internal successors, (7911), 5915 states have internal predecessors, (7911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5916 states to 5916 states and 7911 transitions. [2021-11-07 07:24:56,596 INFO L78 Accepts]: Start accepts. Automaton has 5916 states and 7911 transitions. Word has length 67 [2021-11-07 07:24:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:56,596 INFO L470 AbstractCegarLoop]: Abstraction has 5916 states and 7911 transitions. [2021-11-07 07:24:56,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:56,596 INFO L276 IsEmpty]: Start isEmpty. Operand 5916 states and 7911 transitions. [2021-11-07 07:24:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 07:24:56,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:56,597 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:56,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 07:24:56,597 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:56,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2021-11-07 07:24:56,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:56,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074313847] [2021-11-07 07:24:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:56,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:57,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:57,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074313847] [2021-11-07 07:24:57,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074313847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:57,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029403517] [2021-11-07 07:24:57,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:57,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:24:57,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:24:57,456 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:24:57,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:24:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:58,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 07:24:58,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:04,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029403517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:04,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:25:04,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2021-11-07 07:25:04,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151649680] [2021-11-07 07:25:04,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 07:25:04,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:04,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 07:25:04,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1706, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:25:04,281 INFO L87 Difference]: Start difference. First operand 5916 states and 7911 transitions. Second operand has 44 states, 44 states have (on average 2.840909090909091) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:09,742 INFO L93 Difference]: Finished difference Result 9724 states and 12762 transitions. [2021-11-07 07:25:09,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:25:09,743 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.840909090909091) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 07:25:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:09,753 INFO L225 Difference]: With dead ends: 9724 [2021-11-07 07:25:09,753 INFO L226 Difference]: Without dead ends: 8896 [2021-11-07 07:25:09,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=736, Invalid=3956, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:25:09,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2021-11-07 07:25:10,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 5867. [2021-11-07 07:25:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5867 states, 5865 states have (on average 1.3398124467178176) internal successors, (7858), 5866 states have internal predecessors, (7858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5867 states to 5867 states and 7858 transitions. [2021-11-07 07:25:10,308 INFO L78 Accepts]: Start accepts. Automaton has 5867 states and 7858 transitions. Word has length 68 [2021-11-07 07:25:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:10,309 INFO L470 AbstractCegarLoop]: Abstraction has 5867 states and 7858 transitions. [2021-11-07 07:25:10,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.840909090909091) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 5867 states and 7858 transitions. [2021-11-07 07:25:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 07:25:10,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:10,310 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:10,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:25:10,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 07:25:10,511 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1643110011, now seen corresponding path program 1 times [2021-11-07 07:25:10,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:10,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276987724] [2021-11-07 07:25:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:10,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:10,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:10,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276987724] [2021-11-07 07:25:10,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276987724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:10,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942771659] [2021-11-07 07:25:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:10,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:25:10,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:25:10,890 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:25:10,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:25:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:11,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:25:11,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:13,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942771659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:13,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:25:13,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-07 07:25:13,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481584688] [2021-11-07 07:25:13,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:25:13,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:25:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:25:13,141 INFO L87 Difference]: Start difference. First operand 5867 states and 7858 transitions. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:14,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:14,826 INFO L93 Difference]: Finished difference Result 7495 states and 9934 transitions. [2021-11-07 07:25:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:25:14,827 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 07:25:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:14,837 INFO L225 Difference]: With dead ends: 7495 [2021-11-07 07:25:14,837 INFO L226 Difference]: Without dead ends: 5602 [2021-11-07 07:25:14,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:25:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5602 states. [2021-11-07 07:25:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5602 to 4944. [2021-11-07 07:25:15,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4944 states, 4942 states have (on average 1.3605827600161877) internal successors, (6724), 4943 states have internal predecessors, (6724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:15,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4944 states to 4944 states and 6724 transitions. [2021-11-07 07:25:15,289 INFO L78 Accepts]: Start accepts. Automaton has 4944 states and 6724 transitions. Word has length 69 [2021-11-07 07:25:15,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:15,289 INFO L470 AbstractCegarLoop]: Abstraction has 4944 states and 6724 transitions. [2021-11-07 07:25:15,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:15,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4944 states and 6724 transitions. [2021-11-07 07:25:15,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 07:25:15,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:15,292 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:15,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:25:15,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 07:25:15,510 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:15,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:15,510 INFO L85 PathProgramCache]: Analyzing trace with hash 212235404, now seen corresponding path program 1 times [2021-11-07 07:25:15,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:15,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126247961] [2021-11-07 07:25:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:15,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:15,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:15,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126247961] [2021-11-07 07:25:15,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126247961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:15,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735185998] [2021-11-07 07:25:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:15,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:25:15,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:25:15,895 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:25:15,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:25:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:17,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:25:17,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 24 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:20,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735185998] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:20,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:25:20,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-07 07:25:20,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128160113] [2021-11-07 07:25:20,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:25:20,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:20,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:25:20,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:25:20,074 INFO L87 Difference]: Start difference. First operand 4944 states and 6724 transitions. Second operand has 21 states, 21 states have (on average 10.0) internal successors, (210), 20 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:35,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:35,321 INFO L93 Difference]: Finished difference Result 7422 states and 9807 transitions. [2021-11-07 07:25:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 07:25:35,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 10.0) internal successors, (210), 20 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-07 07:25:35,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:35,328 INFO L225 Difference]: With dead ends: 7422 [2021-11-07 07:25:35,329 INFO L226 Difference]: Without dead ends: 5284 [2021-11-07 07:25:35,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=805, Invalid=2735, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 07:25:35,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-11-07 07:25:35,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 4944. [2021-11-07 07:25:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4944 states, 4942 states have (on average 1.350060704168353) internal successors, (6672), 4943 states have internal predecessors, (6672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4944 states to 4944 states and 6672 transitions. [2021-11-07 07:25:35,930 INFO L78 Accepts]: Start accepts. Automaton has 4944 states and 6672 transitions. Word has length 112 [2021-11-07 07:25:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:35,930 INFO L470 AbstractCegarLoop]: Abstraction has 4944 states and 6672 transitions. [2021-11-07 07:25:35,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.0) internal successors, (210), 20 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:35,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4944 states and 6672 transitions. [2021-11-07 07:25:35,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 07:25:35,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:35,934 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:35,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-07 07:25:36,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:25:36,148 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:36,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1117709487, now seen corresponding path program 1 times [2021-11-07 07:25:36,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:36,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371389468] [2021-11-07 07:25:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:36,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:36,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:36,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371389468] [2021-11-07 07:25:36,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371389468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:36,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397260423] [2021-11-07 07:25:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:36,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:25:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:25:36,782 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:25:36,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:25:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:37,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:25:37,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 26 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:40,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397260423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:40,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:25:40,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-11-07 07:25:40,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959951163] [2021-11-07 07:25:40,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 07:25:40,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:40,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 07:25:40,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:25:40,304 INFO L87 Difference]: Start difference. First operand 4944 states and 6672 transitions. Second operand has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:47,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:47,331 INFO L93 Difference]: Finished difference Result 9256 states and 11955 transitions. [2021-11-07 07:25:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-07 07:25:47,332 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-07 07:25:47,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:47,346 INFO L225 Difference]: With dead ends: 9256 [2021-11-07 07:25:47,346 INFO L226 Difference]: Without dead ends: 8358 [2021-11-07 07:25:47,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=747, Invalid=7263, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 07:25:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2021-11-07 07:25:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 5975. [2021-11-07 07:25:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5975 states, 5973 states have (on average 1.3226184496902729) internal successors, (7900), 5974 states have internal predecessors, (7900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 7900 transitions. [2021-11-07 07:25:48,239 INFO L78 Accepts]: Start accepts. Automaton has 5975 states and 7900 transitions. Word has length 113 [2021-11-07 07:25:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:48,239 INFO L470 AbstractCegarLoop]: Abstraction has 5975 states and 7900 transitions. [2021-11-07 07:25:48,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 5975 states and 7900 transitions. [2021-11-07 07:25:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 07:25:48,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:48,242 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-07 07:25:48,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:25:48,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 07:25:48,443 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:48,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1433585956, now seen corresponding path program 1 times [2021-11-07 07:25:48,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:48,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747841950] [2021-11-07 07:25:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:48,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:48,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:48,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747841950] [2021-11-07 07:25:48,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747841950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:48,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156711283] [2021-11-07 07:25:48,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:48,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:25:48,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:25:48,962 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:25:48,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:25:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:50,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:25:50,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 14 proven. 69 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 07:25:50,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156711283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:50,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:25:50,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 25 [2021-11-07 07:25:50,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927957724] [2021-11-07 07:25:50,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 07:25:50,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:51,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 07:25:51,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:25:51,001 INFO L87 Difference]: Start difference. First operand 5975 states and 7900 transitions. Second operand has 25 states, 25 states have (on average 8.32) internal successors, (208), 25 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:26:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:26:09,486 INFO L93 Difference]: Finished difference Result 13534 states and 16997 transitions. [2021-11-07 07:26:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-11-07 07:26:09,487 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.32) internal successors, (208), 25 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-07 07:26:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:26:09,498 INFO L225 Difference]: With dead ends: 13534 [2021-11-07 07:26:09,498 INFO L226 Difference]: Without dead ends: 10053 [2021-11-07 07:26:09,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15573 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=4451, Invalid=33379, Unknown=0, NotChecked=0, Total=37830 [2021-11-07 07:26:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10053 states. [2021-11-07 07:26:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10053 to 8152. [2021-11-07 07:26:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8152 states, 8150 states have (on average 1.2825766871165645) internal successors, (10453), 8151 states have internal predecessors, (10453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:26:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8152 states to 8152 states and 10453 transitions. [2021-11-07 07:26:11,006 INFO L78 Accepts]: Start accepts. Automaton has 8152 states and 10453 transitions. Word has length 113 [2021-11-07 07:26:11,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:26:11,006 INFO L470 AbstractCegarLoop]: Abstraction has 8152 states and 10453 transitions. [2021-11-07 07:26:11,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.32) internal successors, (208), 25 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:26:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 8152 states and 10453 transitions. [2021-11-07 07:26:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 07:26:11,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:26:11,009 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:26:11,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:26:11,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 07:26:11,210 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:26:11,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:26:11,210 INFO L85 PathProgramCache]: Analyzing trace with hash 588226190, now seen corresponding path program 1 times [2021-11-07 07:26:11,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:26:11,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942424718] [2021-11-07 07:26:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:11,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:26:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:26:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 25 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:11,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:26:11,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942424718] [2021-11-07 07:26:11,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942424718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:26:11,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054190629] [2021-11-07 07:26:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:11,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:26:11,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:26:11,925 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:26:11,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:26:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:26:13,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:26:13,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:26:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 35 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:15,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054190629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:26:15,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:26:15,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 38 [2021-11-07 07:26:15,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362152534] [2021-11-07 07:26:15,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 07:26:15,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:26:15,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 07:26:15,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:26:15,699 INFO L87 Difference]: Start difference. First operand 8152 states and 10453 transitions. Second operand has 38 states, 38 states have (on average 5.578947368421052) internal successors, (212), 38 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:26:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:26:32,015 INFO L93 Difference]: Finished difference Result 19901 states and 24677 transitions. [2021-11-07 07:26:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-11-07 07:26:32,015 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.578947368421052) internal successors, (212), 38 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-07 07:26:32,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:26:32,037 INFO L225 Difference]: With dead ends: 19901 [2021-11-07 07:26:32,037 INFO L226 Difference]: Without dead ends: 17810 [2021-11-07 07:26:32,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8958 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2797, Invalid=25933, Unknown=0, NotChecked=0, Total=28730 [2021-11-07 07:26:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17810 states. [2021-11-07 07:26:34,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17810 to 11881. [2021-11-07 07:26:34,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11881 states, 11879 states have (on average 1.2585234447344054) internal successors, (14950), 11880 states have internal predecessors, (14950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:26:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11881 states to 11881 states and 14950 transitions. [2021-11-07 07:26:34,733 INFO L78 Accepts]: Start accepts. Automaton has 11881 states and 14950 transitions. Word has length 113 [2021-11-07 07:26:34,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:26:34,733 INFO L470 AbstractCegarLoop]: Abstraction has 11881 states and 14950 transitions. [2021-11-07 07:26:34,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.578947368421052) internal successors, (212), 38 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:26:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 11881 states and 14950 transitions. [2021-11-07 07:26:34,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 07:26:34,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:26:34,737 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:26:34,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:26:34,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:26:34,948 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:26:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:26:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash -959943598, now seen corresponding path program 1 times [2021-11-07 07:26:34,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:26:34,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104276740] [2021-11-07 07:26:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:34,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:26:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:26:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 34 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:36,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:26:36,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104276740] [2021-11-07 07:26:36,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104276740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:26:36,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144692425] [2021-11-07 07:26:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:36,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:26:36,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:26:36,295 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:26:36,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86a4a41f-521d-4a3e-9e10-16bde10196a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:26:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:26:37,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:26:37,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:27:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:27:41,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144692425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:27:41,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:27:41,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 43 [2021-11-07 07:27:41,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118662037] [2021-11-07 07:27:41,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 07:27:41,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:27:41,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 07:27:41,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1671, Unknown=29, NotChecked=0, Total=1806 [2021-11-07 07:27:41,129 INFO L87 Difference]: Start difference. First operand 11881 states and 14950 transitions. Second operand has 43 states, 43 states have (on average 5.023255813953488) internal successors, (216), 43 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)