./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be --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 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:16:13,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:16:13,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:16:13,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:16:13,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:16:13,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:16:13,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:16:13,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:16:13,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:16:13,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:16:13,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:16:13,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:16:13,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:16:13,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:16:13,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:16:13,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:16:13,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:16:13,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:16:13,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:16:13,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:16:13,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:16:13,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:16:13,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:16:13,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:16:13,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:16:13,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:16:13,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:16:13,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:16:13,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:16:13,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:16:13,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:16:13,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:16:13,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:16:13,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:16:13,935 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:16:13,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:16:13,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:16:13,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:16:13,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:16:13,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:16:13,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:16:13,940 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:16:13,979 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:16:13,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:16:13,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:16:13,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:16:13,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:16:13,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:16:13,989 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:16:13,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:16:13,989 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:16:13,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:16:13,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:16:13,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:16:13,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:16:13,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:16:13,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:16:13,991 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:16:13,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:16:13,992 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:16:13,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:16:13,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:16:13,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:16:13,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:16:13,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:16:13,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:16:13,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:16:13,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:16:13,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:16:13,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:16:13,995 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:16:13,995 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:16:13,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:16:13,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:16:13,996 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_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c [2021-10-21 19:16:14,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:16:14,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:16:14,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:16:14,300 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:16:14,302 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:16:14,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2021-10-21 19:16:14,387 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/data/30a61e83d/2886e93a2e624618bde9016d7a977239/FLAG1b1469e2e [2021-10-21 19:16:14,890 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:16:14,893 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2021-10-21 19:16:14,908 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/data/30a61e83d/2886e93a2e624618bde9016d7a977239/FLAG1b1469e2e [2021-10-21 19:16:15,278 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/data/30a61e83d/2886e93a2e624618bde9016d7a977239 [2021-10-21 19:16:15,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:16:15,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:16:15,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:16:15,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:16:15,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:16:15,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:16:15" (1/1) ... [2021-10-21 19:16:15,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a6ebbf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:16:15, skipping insertion in model container [2021-10-21 19:16:15,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:16:15" (1/1) ... [2021-10-21 19:16:15,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:16:15,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:16:15,521 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_ca2155f7-b886-4506-9197-5cb0ac19ef23/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2021-10-21 19:16:15,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:16:15,558 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:16:15,572 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_ca2155f7-b886-4506-9197-5cb0ac19ef23/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2021-10-21 19:16:15,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:16:15,594 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:16:15,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:16:15 WrapperNode [2021-10-21 19:16:15,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:16:15,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:16:15,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:16:15,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:16:15,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:16:15" (1/1) ... [2021-10-21 19:16:15,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:16:15" (1/1) ... [2021-10-21 19:16:15,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:16:15,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:16:15,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:16:15,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:16:15,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:16:15" (1/1) ... [2021-10-21 19:16:15,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:16:15" (1/1) ... [2021-10-21 19:16:15,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:16:15" (1/1) ... [2021-10-21 19:16:15,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:16:15" (1/1) ... [2021-10-21 19:16:15,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:16:15" (1/1) ... [2021-10-21 19:16:15,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:16:15" (1/1) ... [2021-10-21 19:16:15,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:16:15" (1/1) ... [2021-10-21 19:16:15,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:16:15,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:16:15,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:16:15,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:16:15,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:16:15" (1/1) ... [2021-10-21 19:16:15,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:16:15,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:15,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:16:15,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:16:15,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:16:15,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:16:15,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:16:15,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:16:16,004 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:16:16,004 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-21 19:16:16,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:16:16 BoogieIcfgContainer [2021-10-21 19:16:16,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:16:16,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:16:16,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:16:16,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:16:16,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:16:15" (1/3) ... [2021-10-21 19:16:16,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537c0bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:16:16, skipping insertion in model container [2021-10-21 19:16:16,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:16:15" (2/3) ... [2021-10-21 19:16:16,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537c0bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:16:16, skipping insertion in model container [2021-10-21 19:16:16,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:16:16" (3/3) ... [2021-10-21 19:16:16,030 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2021-10-21 19:16:16,036 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:16:16,036 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:16:16,102 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:16:16,120 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 [2021-10-21 19:16:16,120 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:16:16,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:16:16,146 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:16,147 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:16,147 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:16,154 INFO L82 PathProgramCache]: Analyzing trace with hash -493598204, now seen corresponding path program 1 times [2021-10-21 19:16:16,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:16,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012601721] [2021-10-21 19:16:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:16,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:16,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:16,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012601721] [2021-10-21 19:16:16,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012601721] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:16:16,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:16:16,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:16:16,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685232622] [2021-10-21 19:16:16,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:16:16,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:16,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:16:16,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:16:16,345 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:16,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:16,373 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2021-10-21 19:16:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:16:16,374 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-21 19:16:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:16,383 INFO L225 Difference]: With dead ends: 33 [2021-10-21 19:16:16,384 INFO L226 Difference]: Without dead ends: 16 [2021-10-21 19:16:16,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:16:16,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-21 19:16:16,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-21 19:16:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-10-21 19:16:16,424 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 12 [2021-10-21 19:16:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:16,425 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-10-21 19:16:16,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2021-10-21 19:16:16,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:16:16,428 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:16,428 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:16,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:16:16,429 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:16,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:16,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2059231113, now seen corresponding path program 1 times [2021-10-21 19:16:16,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:16,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986423216] [2021-10-21 19:16:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:16,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:16,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:16,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986423216] [2021-10-21 19:16:16,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986423216] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:16:16,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:16:16,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:16:16,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384959110] [2021-10-21 19:16:16,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:16:16,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:16,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:16:16,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:16:16,598 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:16,667 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2021-10-21 19:16:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:16:16,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-21 19:16:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:16,668 INFO L225 Difference]: With dead ends: 32 [2021-10-21 19:16:16,669 INFO L226 Difference]: Without dead ends: 20 [2021-10-21 19:16:16,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:16:16,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-21 19:16:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-10-21 19:16:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-10-21 19:16:16,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 12 [2021-10-21 19:16:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:16,675 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-10-21 19:16:16,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-10-21 19:16:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:16:16,676 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:16,677 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:16,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:16:16,677 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:16,678 INFO L82 PathProgramCache]: Analyzing trace with hash 573171571, now seen corresponding path program 1 times [2021-10-21 19:16:16,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:16,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225650617] [2021-10-21 19:16:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:16,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:16:16,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:16,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225650617] [2021-10-21 19:16:16,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225650617] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:16:16,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:16:16,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:16:16,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747543677] [2021-10-21 19:16:16,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:16:16,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:16,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:16:16,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:16:16,777 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:16,867 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2021-10-21 19:16:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:16:16,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-21 19:16:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:16,871 INFO L225 Difference]: With dead ends: 38 [2021-10-21 19:16:16,871 INFO L226 Difference]: Without dead ends: 25 [2021-10-21 19:16:16,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:16:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-21 19:16:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-10-21 19:16:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-10-21 19:16:16,876 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 15 [2021-10-21 19:16:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:16,877 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-10-21 19:16:16,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-10-21 19:16:16,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:16:16,878 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:16,878 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:16,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:16:16,879 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:16,882 INFO L82 PathProgramCache]: Analyzing trace with hash 630429873, now seen corresponding path program 1 times [2021-10-21 19:16:16,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:16,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655653461] [2021-10-21 19:16:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:16,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:16:17,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:17,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655653461] [2021-10-21 19:16:17,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655653461] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:16:17,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:16:17,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:16:17,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471097361] [2021-10-21 19:16:17,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:16:17,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:17,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:16:17,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:16:17,044 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:17,075 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2021-10-21 19:16:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:16:17,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-21 19:16:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:17,078 INFO L225 Difference]: With dead ends: 46 [2021-10-21 19:16:17,078 INFO L226 Difference]: Without dead ends: 32 [2021-10-21 19:16:17,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:16:17,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-21 19:16:17,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-10-21 19:16:17,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 42 transitions. [2021-10-21 19:16:17,088 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 42 transitions. Word has length 15 [2021-10-21 19:16:17,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:17,088 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 42 transitions. [2021-10-21 19:16:17,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:17,089 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 42 transitions. [2021-10-21 19:16:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:16:17,089 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:17,090 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:17,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:16:17,090 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:17,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:17,091 INFO L82 PathProgramCache]: Analyzing trace with hash 630489455, now seen corresponding path program 1 times [2021-10-21 19:16:17,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:17,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126747000] [2021-10-21 19:16:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:17,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:17,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:17,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126747000] [2021-10-21 19:16:17,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126747000] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:17,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243793830] [2021-10-21 19:16:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:17,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:17,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:17,159 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:17,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:16:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:17,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:16:17,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:17,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243793830] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:17,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:17,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-21 19:16:17,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827374765] [2021-10-21 19:16:17,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:16:17,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:17,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:16:17,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:16:17,458 INFO L87 Difference]: Start difference. First operand 30 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:17,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:17,564 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2021-10-21 19:16:17,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:16:17,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-21 19:16:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:17,568 INFO L225 Difference]: With dead ends: 67 [2021-10-21 19:16:17,568 INFO L226 Difference]: Without dead ends: 41 [2021-10-21 19:16:17,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:16:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-21 19:16:17,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-10-21 19:16:17,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:17,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2021-10-21 19:16:17,586 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 15 [2021-10-21 19:16:17,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:17,586 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2021-10-21 19:16:17,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2021-10-21 19:16:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:16:17,588 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:17,588 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:17,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:17,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:17,789 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:17,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:17,790 INFO L82 PathProgramCache]: Analyzing trace with hash 730990835, now seen corresponding path program 2 times [2021-10-21 19:16:17,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:17,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695391637] [2021-10-21 19:16:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:17,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:17,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:17,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695391637] [2021-10-21 19:16:17,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695391637] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:17,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564498010] [2021-10-21 19:16:17,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:16:17,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:17,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:17,900 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:17,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:16:17,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:16:17,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:17,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:16:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:16:18,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564498010] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:18,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:18,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-21 19:16:18,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156296846] [2021-10-21 19:16:18,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:16:18,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:18,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:16:18,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:16:18,159 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:18,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:18,355 INFO L93 Difference]: Finished difference Result 123 states and 179 transitions. [2021-10-21 19:16:18,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:16:18,355 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-21 19:16:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:18,361 INFO L225 Difference]: With dead ends: 123 [2021-10-21 19:16:18,362 INFO L226 Difference]: Without dead ends: 91 [2021-10-21 19:16:18,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:16:18,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-21 19:16:18,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-10-21 19:16:18,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 75 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2021-10-21 19:16:18,391 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 18 [2021-10-21 19:16:18,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:18,392 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2021-10-21 19:16:18,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:18,392 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2021-10-21 19:16:18,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:16:18,394 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:18,395 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:18,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:18,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:18,616 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:18,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:18,616 INFO L82 PathProgramCache]: Analyzing trace with hash -104466575, now seen corresponding path program 1 times [2021-10-21 19:16:18,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:18,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658157438] [2021-10-21 19:16:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:18,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:18,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:18,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658157438] [2021-10-21 19:16:18,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658157438] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:18,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224561942] [2021-10-21 19:16:18,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:18,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:18,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:18,707 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:18,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:16:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:18,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:16:18,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:19,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224561942] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:19,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:19,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-21 19:16:19,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263700383] [2021-10-21 19:16:19,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:16:19,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:19,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:16:19,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:16:19,030 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:19,125 INFO L93 Difference]: Finished difference Result 199 states and 271 transitions. [2021-10-21 19:16:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:16:19,126 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 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 21 [2021-10-21 19:16:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:19,128 INFO L225 Difference]: With dead ends: 199 [2021-10-21 19:16:19,128 INFO L226 Difference]: Without dead ends: 127 [2021-10-21 19:16:19,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:16:19,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-21 19:16:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2021-10-21 19:16:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.367816091954023) internal successors, (119), 87 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 119 transitions. [2021-10-21 19:16:19,155 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 119 transitions. Word has length 21 [2021-10-21 19:16:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:19,156 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 119 transitions. [2021-10-21 19:16:19,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:19,156 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 119 transitions. [2021-10-21 19:16:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:16:19,157 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:19,157 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:19,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-21 19:16:19,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-21 19:16:19,377 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:19,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:19,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1399176113, now seen corresponding path program 2 times [2021-10-21 19:16:19,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:19,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673201467] [2021-10-21 19:16:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:19,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:19,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:19,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673201467] [2021-10-21 19:16:19,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673201467] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:19,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759387367] [2021-10-21 19:16:19,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:16:19,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:19,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:19,499 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:19,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:16:19,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:16:19,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:19,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:16:19,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:16:19,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759387367] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:19,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:19,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-21 19:16:19,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865399415] [2021-10-21 19:16:19,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:16:19,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:19,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:16:19,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:16:19,777 INFO L87 Difference]: Start difference. First operand 88 states and 119 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:20,016 INFO L93 Difference]: Finished difference Result 291 states and 407 transitions. [2021-10-21 19:16:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:16:20,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-21 19:16:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:20,020 INFO L225 Difference]: With dead ends: 291 [2021-10-21 19:16:20,020 INFO L226 Difference]: Without dead ends: 207 [2021-10-21 19:16:20,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:16:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-21 19:16:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 146. [2021-10-21 19:16:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3655172413793104) internal successors, (198), 145 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:20,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 198 transitions. [2021-10-21 19:16:20,040 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 198 transitions. Word has length 24 [2021-10-21 19:16:20,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:20,040 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 198 transitions. [2021-10-21 19:16:20,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:20,040 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 198 transitions. [2021-10-21 19:16:20,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:16:20,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:20,042 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:20,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:20,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:20,255 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:20,256 INFO L82 PathProgramCache]: Analyzing trace with hash -2084547665, now seen corresponding path program 3 times [2021-10-21 19:16:20,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:20,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317125524] [2021-10-21 19:16:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:20,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:20,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:20,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317125524] [2021-10-21 19:16:20,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317125524] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:20,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092073885] [2021-10-21 19:16:20,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:16:20,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:20,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:20,341 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:20,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:16:20,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:16:20,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:20,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:16:20,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-21 19:16:20,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092073885] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:16:20,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:16:20,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2021-10-21 19:16:20,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317512960] [2021-10-21 19:16:20,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:16:20,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:20,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:16:20,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:16:20,523 INFO L87 Difference]: Start difference. First operand 146 states and 198 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:20,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:20,586 INFO L93 Difference]: Finished difference Result 334 states and 454 transitions. [2021-10-21 19:16:20,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:16:20,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-21 19:16:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:20,589 INFO L225 Difference]: With dead ends: 334 [2021-10-21 19:16:20,589 INFO L226 Difference]: Without dead ends: 192 [2021-10-21 19:16:20,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:16:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-21 19:16:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 164. [2021-10-21 19:16:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.2638036809815951) internal successors, (206), 163 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2021-10-21 19:16:20,618 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 27 [2021-10-21 19:16:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:20,620 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2021-10-21 19:16:20,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:20,620 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2021-10-21 19:16:20,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:16:20,624 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:20,624 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:20,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:20,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:20,847 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:20,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:20,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1868779761, now seen corresponding path program 1 times [2021-10-21 19:16:20,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:20,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010371779] [2021-10-21 19:16:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:20,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-21 19:16:20,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:20,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010371779] [2021-10-21 19:16:20,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010371779] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:16:20,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:16:20,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:16:20,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898015923] [2021-10-21 19:16:20,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:16:20,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:20,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:16:20,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:16:20,879 INFO L87 Difference]: Start difference. First operand 164 states and 206 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:20,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:20,909 INFO L93 Difference]: Finished difference Result 344 states and 436 transitions. [2021-10-21 19:16:20,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:16:20,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-21 19:16:20,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:20,911 INFO L225 Difference]: With dead ends: 344 [2021-10-21 19:16:20,912 INFO L226 Difference]: Without dead ends: 184 [2021-10-21 19:16:20,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:16:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-21 19:16:20,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 162. [2021-10-21 19:16:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.2422360248447204) internal successors, (200), 161 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:20,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 200 transitions. [2021-10-21 19:16:20,933 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 200 transitions. Word has length 27 [2021-10-21 19:16:20,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:20,934 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 200 transitions. [2021-10-21 19:16:20,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:20,934 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 200 transitions. [2021-10-21 19:16:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:16:20,940 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:20,940 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:20,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:16:20,941 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:20,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:20,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1323368939, now seen corresponding path program 1 times [2021-10-21 19:16:20,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:20,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424279611] [2021-10-21 19:16:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:20,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-21 19:16:20,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:20,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424279611] [2021-10-21 19:16:20,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424279611] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:16:20,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:16:20,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:16:20,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590911296] [2021-10-21 19:16:20,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:16:20,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:20,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:16:20,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:16:20,990 INFO L87 Difference]: Start difference. First operand 162 states and 200 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:21,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:21,013 INFO L93 Difference]: Finished difference Result 256 states and 318 transitions. [2021-10-21 19:16:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:16:21,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-21 19:16:21,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:21,016 INFO L225 Difference]: With dead ends: 256 [2021-10-21 19:16:21,016 INFO L226 Difference]: Without dead ends: 176 [2021-10-21 19:16:21,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:16:21,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-21 19:16:21,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2021-10-21 19:16:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2121212121212122) internal successors, (200), 165 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 200 transitions. [2021-10-21 19:16:21,031 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 200 transitions. Word has length 28 [2021-10-21 19:16:21,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:21,032 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 200 transitions. [2021-10-21 19:16:21,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:21,032 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 200 transitions. [2021-10-21 19:16:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:16:21,035 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:21,035 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:21,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:16:21,036 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:21,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:21,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1325275563, now seen corresponding path program 1 times [2021-10-21 19:16:21,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:21,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326238870] [2021-10-21 19:16:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:21,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:21,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:21,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326238870] [2021-10-21 19:16:21,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326238870] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:21,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108609214] [2021-10-21 19:16:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:21,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:21,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:21,151 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:21,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:16:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:21,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:16:21,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:21,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108609214] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:21,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:21,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-21 19:16:21,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928689789] [2021-10-21 19:16:21,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:16:21,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:21,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:16:21,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:16:21,473 INFO L87 Difference]: Start difference. First operand 166 states and 200 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:21,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:21,563 INFO L93 Difference]: Finished difference Result 457 states and 547 transitions. [2021-10-21 19:16:21,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:16:21,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 28 [2021-10-21 19:16:21,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:21,566 INFO L225 Difference]: With dead ends: 457 [2021-10-21 19:16:21,566 INFO L226 Difference]: Without dead ends: 295 [2021-10-21 19:16:21,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:16:21,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-10-21 19:16:21,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 196. [2021-10-21 19:16:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.2) internal successors, (234), 195 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 234 transitions. [2021-10-21 19:16:21,585 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 234 transitions. Word has length 28 [2021-10-21 19:16:21,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:21,587 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 234 transitions. [2021-10-21 19:16:21,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 234 transitions. [2021-10-21 19:16:21,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:16:21,589 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:21,589 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:21,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:21,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:21,811 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:21,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:21,812 INFO L82 PathProgramCache]: Analyzing trace with hash 399501479, now seen corresponding path program 2 times [2021-10-21 19:16:21,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:21,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091077777] [2021-10-21 19:16:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:21,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:21,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:21,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091077777] [2021-10-21 19:16:21,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091077777] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:21,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039713720] [2021-10-21 19:16:21,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:16:21,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:21,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:21,916 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:21,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:16:22,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:16:22,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:22,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:16:22,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:22,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039713720] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:22,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:22,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-21 19:16:22,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982699367] [2021-10-21 19:16:22,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:16:22,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:22,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:16:22,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:16:22,275 INFO L87 Difference]: Start difference. First operand 196 states and 234 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:22,375 INFO L93 Difference]: Finished difference Result 517 states and 615 transitions. [2021-10-21 19:16:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:16:22,375 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-21 19:16:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:22,378 INFO L225 Difference]: With dead ends: 517 [2021-10-21 19:16:22,378 INFO L226 Difference]: Without dead ends: 325 [2021-10-21 19:16:22,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:16:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-10-21 19:16:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 226. [2021-10-21 19:16:22,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.191111111111111) internal successors, (268), 225 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 268 transitions. [2021-10-21 19:16:22,398 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 268 transitions. Word has length 31 [2021-10-21 19:16:22,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:22,398 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 268 transitions. [2021-10-21 19:16:22,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:22,399 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 268 transitions. [2021-10-21 19:16:22,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:16:22,399 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:22,399 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:22,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:22,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:16:22,627 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:22,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:22,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1351227349, now seen corresponding path program 3 times [2021-10-21 19:16:22,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:22,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591222941] [2021-10-21 19:16:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:22,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:22,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:22,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591222941] [2021-10-21 19:16:22,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591222941] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:22,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325091740] [2021-10-21 19:16:22,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:16:22,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:22,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:22,742 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:22,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:16:22,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:16:22,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:22,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:16:22,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-21 19:16:22,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325091740] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:16:22,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:16:22,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2021-10-21 19:16:22,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906303515] [2021-10-21 19:16:22,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:16:22,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:22,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:16:22,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:16:22,979 INFO L87 Difference]: Start difference. First operand 226 states and 268 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:23,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:23,045 INFO L93 Difference]: Finished difference Result 229 states and 270 transitions. [2021-10-21 19:16:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:16:23,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-21 19:16:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:23,047 INFO L225 Difference]: With dead ends: 229 [2021-10-21 19:16:23,047 INFO L226 Difference]: Without dead ends: 169 [2021-10-21 19:16:23,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:16:23,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-21 19:16:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-10-21 19:16:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 167 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 201 transitions. [2021-10-21 19:16:23,060 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 201 transitions. Word has length 34 [2021-10-21 19:16:23,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:23,061 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 201 transitions. [2021-10-21 19:16:23,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:23,061 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 201 transitions. [2021-10-21 19:16:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:16:23,061 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:23,061 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:23,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:23,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 19:16:23,287 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:23,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1860700439, now seen corresponding path program 1 times [2021-10-21 19:16:23,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:23,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336498907] [2021-10-21 19:16:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:23,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:23,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:23,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336498907] [2021-10-21 19:16:23,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336498907] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:23,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214390254] [2021-10-21 19:16:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:23,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:23,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:23,365 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:23,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:16:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:23,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:16:23,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:23,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214390254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:23,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:23,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-21 19:16:23,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861391369] [2021-10-21 19:16:23,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:16:23,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:23,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:16:23,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:16:23,752 INFO L87 Difference]: Start difference. First operand 168 states and 201 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:23,852 INFO L93 Difference]: Finished difference Result 451 states and 537 transitions. [2021-10-21 19:16:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:16:23,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-21 19:16:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:23,855 INFO L225 Difference]: With dead ends: 451 [2021-10-21 19:16:23,855 INFO L226 Difference]: Without dead ends: 287 [2021-10-21 19:16:23,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:16:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-21 19:16:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 192. [2021-10-21 19:16:23,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.198952879581152) internal successors, (229), 191 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 229 transitions. [2021-10-21 19:16:23,873 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 229 transitions. Word has length 34 [2021-10-21 19:16:23,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:23,873 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 229 transitions. [2021-10-21 19:16:23,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 229 transitions. [2021-10-21 19:16:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:16:23,874 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:23,875 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:23,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:24,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:16:24,091 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:24,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1470700201, now seen corresponding path program 2 times [2021-10-21 19:16:24,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:24,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493614838] [2021-10-21 19:16:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:24,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:24,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:24,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493614838] [2021-10-21 19:16:24,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493614838] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:24,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018430886] [2021-10-21 19:16:24,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:16:24,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:24,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:24,188 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:24,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:16:24,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:16:24,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:24,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:16:24,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:24,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018430886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:24,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:24,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-10-21 19:16:24,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028007481] [2021-10-21 19:16:24,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 19:16:24,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:24,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 19:16:24,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:16:24,628 INFO L87 Difference]: Start difference. First operand 192 states and 229 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:24,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:24,753 INFO L93 Difference]: Finished difference Result 499 states and 593 transitions. [2021-10-21 19:16:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:16:24,754 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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 37 [2021-10-21 19:16:24,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:24,756 INFO L225 Difference]: With dead ends: 499 [2021-10-21 19:16:24,756 INFO L226 Difference]: Without dead ends: 311 [2021-10-21 19:16:24,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:16:24,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-10-21 19:16:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 216. [2021-10-21 19:16:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.1953488372093024) internal successors, (257), 215 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:24,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 257 transitions. [2021-10-21 19:16:24,774 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 257 transitions. Word has length 37 [2021-10-21 19:16:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:24,774 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 257 transitions. [2021-10-21 19:16:24,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 257 transitions. [2021-10-21 19:16:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:16:24,775 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:24,776 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:24,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:25,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:16:25,003 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:25,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:25,004 INFO L82 PathProgramCache]: Analyzing trace with hash -877109527, now seen corresponding path program 3 times [2021-10-21 19:16:25,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:25,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057676210] [2021-10-21 19:16:25,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:25,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:25,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:25,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057676210] [2021-10-21 19:16:25,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057676210] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:25,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824066025] [2021-10-21 19:16:25,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:16:25,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:25,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:25,119 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:25,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:16:25,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:16:25,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:25,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:16:25,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-21 19:16:25,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824066025] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:16:25,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:16:25,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2021-10-21 19:16:25,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399219169] [2021-10-21 19:16:25,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:16:25,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:25,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:16:25,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:16:25,663 INFO L87 Difference]: Start difference. First operand 216 states and 257 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:25,774 INFO L93 Difference]: Finished difference Result 496 states and 586 transitions. [2021-10-21 19:16:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:16:25,774 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-21 19:16:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:25,777 INFO L225 Difference]: With dead ends: 496 [2021-10-21 19:16:25,777 INFO L226 Difference]: Without dead ends: 494 [2021-10-21 19:16:25,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:16:25,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-10-21 19:16:25,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 306. [2021-10-21 19:16:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1836065573770491) internal successors, (361), 305 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 361 transitions. [2021-10-21 19:16:25,810 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 361 transitions. Word has length 40 [2021-10-21 19:16:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:25,810 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 361 transitions. [2021-10-21 19:16:25,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 361 transitions. [2021-10-21 19:16:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:16:25,811 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:25,811 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:25,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:26,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:16:26,035 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:26,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:26,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1950517015, now seen corresponding path program 1 times [2021-10-21 19:16:26,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:26,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004493180] [2021-10-21 19:16:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:26,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:26,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:26,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004493180] [2021-10-21 19:16:26,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004493180] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:26,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976780868] [2021-10-21 19:16:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:26,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:26,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:26,171 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:26,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:16:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:26,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:16:26,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:26,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976780868] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:26,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:26,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-21 19:16:26,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714947735] [2021-10-21 19:16:26,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:16:26,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:26,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:16:26,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:16:26,716 INFO L87 Difference]: Start difference. First operand 306 states and 361 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:26,845 INFO L93 Difference]: Finished difference Result 669 states and 793 transitions. [2021-10-21 19:16:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:16:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-21 19:16:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:26,849 INFO L225 Difference]: With dead ends: 669 [2021-10-21 19:16:26,849 INFO L226 Difference]: Without dead ends: 439 [2021-10-21 19:16:26,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:16:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-10-21 19:16:26,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 339. [2021-10-21 19:16:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.180473372781065) internal successors, (399), 338 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:26,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 399 transitions. [2021-10-21 19:16:26,878 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 399 transitions. Word has length 40 [2021-10-21 19:16:26,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:26,879 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 399 transitions. [2021-10-21 19:16:26,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:26,879 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 399 transitions. [2021-10-21 19:16:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:16:26,880 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:26,880 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:26,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:27,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:16:27,095 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:27,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:27,096 INFO L82 PathProgramCache]: Analyzing trace with hash -658324379, now seen corresponding path program 2 times [2021-10-21 19:16:27,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:27,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337234847] [2021-10-21 19:16:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:27,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:27,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:27,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337234847] [2021-10-21 19:16:27,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337234847] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:27,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062201539] [2021-10-21 19:16:27,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:16:27,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:27,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:27,234 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:27,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:16:27,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:16:27,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:27,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:16:27,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-21 19:16:27,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062201539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:27,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:27,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-10-21 19:16:27,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911561039] [2021-10-21 19:16:27,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:16:27,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:16:27,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:16:27,736 INFO L87 Difference]: Start difference. First operand 339 states and 399 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:28,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:28,173 INFO L93 Difference]: Finished difference Result 1075 states and 1251 transitions. [2021-10-21 19:16:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 19:16:28,173 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-21 19:16:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:28,178 INFO L225 Difference]: With dead ends: 1075 [2021-10-21 19:16:28,178 INFO L226 Difference]: Without dead ends: 821 [2021-10-21 19:16:28,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 351.0ms TimeCoverageRelationStatistics Valid=486, Invalid=996, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 19:16:28,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-10-21 19:16:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 333. [2021-10-21 19:16:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.1686746987951808) internal successors, (388), 332 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-10-21 19:16:28,218 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 43 [2021-10-21 19:16:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:28,218 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-10-21 19:16:28,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:28,219 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-10-21 19:16:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:16:28,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:28,220 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:28,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:28,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:28,435 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:28,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1311604647, now seen corresponding path program 3 times [2021-10-21 19:16:28,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:28,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284249551] [2021-10-21 19:16:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:28,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:28,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:28,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284249551] [2021-10-21 19:16:28,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284249551] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:28,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188011464] [2021-10-21 19:16:28,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:16:28,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:28,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:28,618 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:28,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:16:28,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:16:28,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:28,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:16:28,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:16:29,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188011464] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:16:29,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:16:29,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 21 [2021-10-21 19:16:29,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614207476] [2021-10-21 19:16:29,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:16:29,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:29,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:16:29,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:16:29,232 INFO L87 Difference]: Start difference. First operand 333 states and 388 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:29,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:29,376 INFO L93 Difference]: Finished difference Result 442 states and 513 transitions. [2021-10-21 19:16:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:16:29,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-21 19:16:29,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:29,379 INFO L225 Difference]: With dead ends: 442 [2021-10-21 19:16:29,379 INFO L226 Difference]: Without dead ends: 440 [2021-10-21 19:16:29,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:16:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-10-21 19:16:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 333. [2021-10-21 19:16:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.1686746987951808) internal successors, (388), 332 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-10-21 19:16:29,411 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 46 [2021-10-21 19:16:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:29,411 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-10-21 19:16:29,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:29,412 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-10-21 19:16:29,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:16:29,412 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:29,413 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:29,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:29,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:29,639 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:29,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:29,640 INFO L82 PathProgramCache]: Analyzing trace with hash -53609623, now seen corresponding path program 1 times [2021-10-21 19:16:29,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:29,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89928160] [2021-10-21 19:16:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:29,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-10-21 19:16:29,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:29,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89928160] [2021-10-21 19:16:29,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89928160] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:16:29,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:16:29,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:16:29,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214346458] [2021-10-21 19:16:29,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:16:29,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:29,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:16:29,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:16:29,703 INFO L87 Difference]: Start difference. First operand 333 states and 388 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:29,764 INFO L93 Difference]: Finished difference Result 561 states and 655 transitions. [2021-10-21 19:16:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:16:29,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-21 19:16:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:29,767 INFO L225 Difference]: With dead ends: 561 [2021-10-21 19:16:29,767 INFO L226 Difference]: Without dead ends: 448 [2021-10-21 19:16:29,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:16:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-10-21 19:16:29,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 400. [2021-10-21 19:16:29,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.1754385964912282) internal successors, (469), 399 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 469 transitions. [2021-10-21 19:16:29,806 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 469 transitions. Word has length 46 [2021-10-21 19:16:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:29,806 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 469 transitions. [2021-10-21 19:16:29,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 469 transitions. [2021-10-21 19:16:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-21 19:16:29,807 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:29,808 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:29,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-21 19:16:29,808 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:29,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1284068705, now seen corresponding path program 1 times [2021-10-21 19:16:29,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:29,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478610978] [2021-10-21 19:16:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:29,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-10-21 19:16:29,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:29,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478610978] [2021-10-21 19:16:29,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478610978] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:29,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595393039] [2021-10-21 19:16:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:29,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:29,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:29,961 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:29,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:16:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:30,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:16:30,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-10-21 19:16:30,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595393039] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:30,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:30,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-10-21 19:16:30,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943463512] [2021-10-21 19:16:30,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-21 19:16:30,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:30,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-21 19:16:30,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:16:30,763 INFO L87 Difference]: Start difference. First operand 400 states and 469 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:31,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:31,013 INFO L93 Difference]: Finished difference Result 1102 states and 1266 transitions. [2021-10-21 19:16:31,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:16:31,014 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 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 87 [2021-10-21 19:16:31,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:31,018 INFO L225 Difference]: With dead ends: 1102 [2021-10-21 19:16:31,018 INFO L226 Difference]: Without dead ends: 793 [2021-10-21 19:16:31,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 225.6ms TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:16:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-10-21 19:16:31,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 439. [2021-10-21 19:16:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.17351598173516) internal successors, (514), 438 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 514 transitions. [2021-10-21 19:16:31,076 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 514 transitions. Word has length 87 [2021-10-21 19:16:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:31,076 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 514 transitions. [2021-10-21 19:16:31,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:31,076 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 514 transitions. [2021-10-21 19:16:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-21 19:16:31,083 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:31,083 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:31,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:31,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-21 19:16:31,300 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1856213775, now seen corresponding path program 2 times [2021-10-21 19:16:31,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:31,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778820027] [2021-10-21 19:16:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:31,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-10-21 19:16:31,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:31,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778820027] [2021-10-21 19:16:31,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778820027] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:31,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444139132] [2021-10-21 19:16:31,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:16:31,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:31,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:31,452 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:31,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:16:31,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:16:31,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:31,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:16:31,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-10-21 19:16:32,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444139132] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:32,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:32,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-10-21 19:16:32,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069718481] [2021-10-21 19:16:32,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 19:16:32,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 19:16:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:16:32,207 INFO L87 Difference]: Start difference. First operand 439 states and 514 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:32,484 INFO L93 Difference]: Finished difference Result 1171 states and 1346 transitions. [2021-10-21 19:16:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:16:32,485 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-10-21 19:16:32,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:32,489 INFO L225 Difference]: With dead ends: 1171 [2021-10-21 19:16:32,489 INFO L226 Difference]: Without dead ends: 832 [2021-10-21 19:16:32,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:16:32,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-10-21 19:16:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 478. [2021-10-21 19:16:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.1719077568134173) internal successors, (559), 477 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:32,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 559 transitions. [2021-10-21 19:16:32,545 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 559 transitions. Word has length 93 [2021-10-21 19:16:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:32,545 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 559 transitions. [2021-10-21 19:16:32,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:32,545 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 559 transitions. [2021-10-21 19:16:32,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-21 19:16:32,547 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:32,547 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:32,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:32,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 19:16:32,763 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:32,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:32,763 INFO L82 PathProgramCache]: Analyzing trace with hash -267019423, now seen corresponding path program 3 times [2021-10-21 19:16:32,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:32,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531402616] [2021-10-21 19:16:32,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:32,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 535 proven. 247 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-10-21 19:16:32,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:32,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531402616] [2021-10-21 19:16:32,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531402616] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:32,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120272108] [2021-10-21 19:16:32,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:16:32,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:32,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:32,957 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:32,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:16:33,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:16:33,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:33,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 19:16:33,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 37 proven. 541 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-10-21 19:16:33,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120272108] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:33,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:33,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 24 [2021-10-21 19:16:33,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476378057] [2021-10-21 19:16:33,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-21 19:16:33,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:33,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-21 19:16:33,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:16:33,999 INFO L87 Difference]: Start difference. First operand 478 states and 559 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:35,829 INFO L93 Difference]: Finished difference Result 2208 states and 2540 transitions. [2021-10-21 19:16:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-21 19:16:35,829 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 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 99 [2021-10-21 19:16:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:35,839 INFO L225 Difference]: With dead ends: 2208 [2021-10-21 19:16:35,840 INFO L226 Difference]: Without dead ends: 1839 [2021-10-21 19:16:35,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 1300.6ms TimeCoverageRelationStatistics Valid=1574, Invalid=5908, Unknown=0, NotChecked=0, Total=7482 [2021-10-21 19:16:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-10-21 19:16:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 770. [2021-10-21 19:16:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 1.1716514954486346) internal successors, (901), 769 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:35,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 901 transitions. [2021-10-21 19:16:35,960 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 901 transitions. Word has length 99 [2021-10-21 19:16:35,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:35,961 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 901 transitions. [2021-10-21 19:16:35,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:35,961 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 901 transitions. [2021-10-21 19:16:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-21 19:16:35,963 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:35,963 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 24, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:35,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:36,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:36,191 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:36,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:36,192 INFO L82 PathProgramCache]: Analyzing trace with hash -111346257, now seen corresponding path program 1 times [2021-10-21 19:16:36,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:36,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498319840] [2021-10-21 19:16:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:36,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 49 proven. 861 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-10-21 19:16:36,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:36,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498319840] [2021-10-21 19:16:36,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498319840] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:36,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081113638] [2021-10-21 19:16:36,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:36,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:36,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:36,385 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:36,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:16:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:36,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:16:36,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 618 proven. 287 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-10-21 19:16:37,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081113638] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:37,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:37,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-10-21 19:16:37,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662992447] [2021-10-21 19:16:37,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-21 19:16:37,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-21 19:16:37,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:16:37,407 INFO L87 Difference]: Start difference. First operand 770 states and 901 transitions. Second operand has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:37,728 INFO L93 Difference]: Finished difference Result 1968 states and 2264 transitions. [2021-10-21 19:16:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:16:37,729 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-10-21 19:16:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:37,734 INFO L225 Difference]: With dead ends: 1968 [2021-10-21 19:16:37,735 INFO L226 Difference]: Without dead ends: 1316 [2021-10-21 19:16:37,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:16:37,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-10-21 19:16:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 809. [2021-10-21 19:16:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 1.1707920792079207) internal successors, (946), 808 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:37,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 946 transitions. [2021-10-21 19:16:37,847 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 946 transitions. Word has length 105 [2021-10-21 19:16:37,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:37,847 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 946 transitions. [2021-10-21 19:16:37,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:37,848 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 946 transitions. [2021-10-21 19:16:37,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-21 19:16:37,850 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:37,850 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 26, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:37,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:38,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:38,063 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:38,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:38,064 INFO L82 PathProgramCache]: Analyzing trace with hash 802849635, now seen corresponding path program 2 times [2021-10-21 19:16:38,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:38,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873591319] [2021-10-21 19:16:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:38,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 52 proven. 990 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-10-21 19:16:38,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:38,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873591319] [2021-10-21 19:16:38,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873591319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:38,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603182314] [2021-10-21 19:16:38,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:16:38,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:38,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:38,265 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:38,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:16:38,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:16:38,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:38,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 19:16:38,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-10-21 19:16:39,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603182314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:39,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:39,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-10-21 19:16:39,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458603809] [2021-10-21 19:16:39,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-21 19:16:39,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:39,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-21 19:16:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:16:39,283 INFO L87 Difference]: Start difference. First operand 809 states and 946 transitions. Second operand has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 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) [2021-10-21 19:16:39,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:39,673 INFO L93 Difference]: Finished difference Result 2078 states and 2393 transitions. [2021-10-21 19:16:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:16:39,674 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 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 111 [2021-10-21 19:16:39,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:39,681 INFO L225 Difference]: With dead ends: 2078 [2021-10-21 19:16:39,681 INFO L226 Difference]: Without dead ends: 1396 [2021-10-21 19:16:39,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:16:39,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-10-21 19:16:39,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 866. [2021-10-21 19:16:39,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.169942196531792) internal successors, (1012), 865 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1012 transitions. [2021-10-21 19:16:39,846 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1012 transitions. Word has length 111 [2021-10-21 19:16:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:39,846 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1012 transitions. [2021-10-21 19:16:39,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 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) [2021-10-21 19:16:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1012 transitions. [2021-10-21 19:16:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-21 19:16:39,849 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:39,849 INFO L512 BasicCegarLoop]: trace histogram [32, 32, 28, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:39,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:40,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 19:16:40,075 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:40,076 INFO L82 PathProgramCache]: Analyzing trace with hash -780287697, now seen corresponding path program 3 times [2021-10-21 19:16:40,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:40,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734103947] [2021-10-21 19:16:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:40,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 55 proven. 1128 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-10-21 19:16:40,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:40,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734103947] [2021-10-21 19:16:40,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734103947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:40,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844910020] [2021-10-21 19:16:40,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:16:40,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:40,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:40,311 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:40,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:16:40,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:16:40,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:40,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:16:40,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 807 proven. 47 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2021-10-21 19:16:41,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844910020] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:41,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:41,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 25 [2021-10-21 19:16:41,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506902111] [2021-10-21 19:16:41,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-21 19:16:41,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:41,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-21 19:16:41,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:16:41,286 INFO L87 Difference]: Start difference. First operand 866 states and 1012 transitions. Second operand has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:42,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:42,861 INFO L93 Difference]: Finished difference Result 2428 states and 2841 transitions. [2021-10-21 19:16:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-21 19:16:42,861 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 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 117 [2021-10-21 19:16:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:42,867 INFO L225 Difference]: With dead ends: 2428 [2021-10-21 19:16:42,867 INFO L226 Difference]: Without dead ends: 1698 [2021-10-21 19:16:42,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 1195.6ms TimeCoverageRelationStatistics Valid=1816, Invalid=4990, Unknown=0, NotChecked=0, Total=6806 [2021-10-21 19:16:42,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-10-21 19:16:43,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1132. [2021-10-21 19:16:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.1520778072502211) internal successors, (1303), 1131 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:43,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1303 transitions. [2021-10-21 19:16:43,016 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1303 transitions. Word has length 117 [2021-10-21 19:16:43,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:43,016 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1303 transitions. [2021-10-21 19:16:43,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:43,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1303 transitions. [2021-10-21 19:16:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-21 19:16:43,018 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:43,019 INFO L512 BasicCegarLoop]: trace histogram [34, 34, 20, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:43,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:43,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:43,240 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:43,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:43,240 INFO L82 PathProgramCache]: Analyzing trace with hash 840591843, now seen corresponding path program 4 times [2021-10-21 19:16:43,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:43,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792907957] [2021-10-21 19:16:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:43,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 984 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-10-21 19:16:43,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:43,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792907957] [2021-10-21 19:16:43,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792907957] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:16:43,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:16:43,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:16:43,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481686080] [2021-10-21 19:16:43,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:16:43,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:43,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:16:43,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:16:43,295 INFO L87 Difference]: Start difference. First operand 1132 states and 1303 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:43,465 INFO L93 Difference]: Finished difference Result 1815 states and 2023 transitions. [2021-10-21 19:16:43,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:16:43,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 123 [2021-10-21 19:16:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:43,473 INFO L225 Difference]: With dead ends: 1815 [2021-10-21 19:16:43,473 INFO L226 Difference]: Without dead ends: 1604 [2021-10-21 19:16:43,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:16:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-10-21 19:16:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1150. [2021-10-21 19:16:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.154917319408181) internal successors, (1327), 1149 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1327 transitions. [2021-10-21 19:16:43,653 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1327 transitions. Word has length 123 [2021-10-21 19:16:43,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:43,654 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1327 transitions. [2021-10-21 19:16:43,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:43,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1327 transitions. [2021-10-21 19:16:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-21 19:16:43,656 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:43,656 INFO L512 BasicCegarLoop]: trace histogram [34, 34, 19, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:43,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-21 19:16:43,657 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1273355935, now seen corresponding path program 5 times [2021-10-21 19:16:43,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:43,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143133606] [2021-10-21 19:16:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:43,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 903 proven. 425 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-10-21 19:16:43,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:43,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143133606] [2021-10-21 19:16:43,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143133606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:43,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948327251] [2021-10-21 19:16:43,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:16:43,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:43,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:43,911 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:43,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:16:44,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-10-21 19:16:44,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:44,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 19:16:44,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 1159 proven. 338 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-10-21 19:16:45,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948327251] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:45,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:45,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 42 [2021-10-21 19:16:45,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169583766] [2021-10-21 19:16:45,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-21 19:16:45,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:45,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-21 19:16:45,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1341, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 19:16:45,338 INFO L87 Difference]: Start difference. First operand 1150 states and 1327 transitions. Second operand has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:46,685 INFO L93 Difference]: Finished difference Result 2896 states and 3293 transitions. [2021-10-21 19:16:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-21 19:16:46,685 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 states have internal predecessors, (146), 0 states have call successors, (0), 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 123 [2021-10-21 19:16:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:46,692 INFO L225 Difference]: With dead ends: 2896 [2021-10-21 19:16:46,692 INFO L226 Difference]: Without dead ends: 1893 [2021-10-21 19:16:46,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 1384.5ms TimeCoverageRelationStatistics Valid=2087, Invalid=7033, Unknown=0, NotChecked=0, Total=9120 [2021-10-21 19:16:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-10-21 19:16:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1123. [2021-10-21 19:16:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 1.1452762923351159) internal successors, (1285), 1122 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1285 transitions. [2021-10-21 19:16:46,821 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1285 transitions. Word has length 123 [2021-10-21 19:16:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:46,821 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1285 transitions. [2021-10-21 19:16:46,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1285 transitions. [2021-10-21 19:16:46,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-10-21 19:16:46,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:46,824 INFO L512 BasicCegarLoop]: trace histogram [36, 36, 21, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:46,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:47,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:16:47,035 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:47,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:47,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1151168365, now seen corresponding path program 6 times [2021-10-21 19:16:47,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:47,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332369128] [2021-10-21 19:16:47,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:47,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 1010 proven. 477 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-21 19:16:47,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:47,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332369128] [2021-10-21 19:16:47,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332369128] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:47,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145182039] [2021-10-21 19:16:47,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:16:47,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:47,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:47,287 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:47,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:16:47,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-21 19:16:47,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:47,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:16:47,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 228 proven. 1027 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-10-21 19:16:48,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145182039] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:48,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:48,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 29 [2021-10-21 19:16:48,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739325176] [2021-10-21 19:16:48,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 19:16:48,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:48,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 19:16:48,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:16:48,996 INFO L87 Difference]: Start difference. First operand 1123 states and 1285 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:51,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:51,553 INFO L93 Difference]: Finished difference Result 2474 states and 2859 transitions. [2021-10-21 19:16:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-10-21 19:16:51,554 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 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 129 [2021-10-21 19:16:51,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:51,559 INFO L225 Difference]: With dead ends: 2474 [2021-10-21 19:16:51,559 INFO L226 Difference]: Without dead ends: 1496 [2021-10-21 19:16:51,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5530 ImplicationChecksByTransitivity, 2293.7ms TimeCoverageRelationStatistics Valid=3495, Invalid=13535, Unknown=0, NotChecked=0, Total=17030 [2021-10-21 19:16:51,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-10-21 19:16:51,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1254. [2021-10-21 19:16:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 1.1524341580207502) internal successors, (1444), 1253 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1444 transitions. [2021-10-21 19:16:51,707 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1444 transitions. Word has length 129 [2021-10-21 19:16:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:51,707 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 1444 transitions. [2021-10-21 19:16:51,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1444 transitions. [2021-10-21 19:16:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-21 19:16:51,709 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:51,710 INFO L512 BasicCegarLoop]: trace histogram [39, 39, 37, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:51,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:51,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:51,923 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:51,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:51,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2144366173, now seen corresponding path program 1 times [2021-10-21 19:16:51,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:51,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334499108] [2021-10-21 19:16:51,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:51,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 1182 proven. 590 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-10-21 19:16:52,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:52,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334499108] [2021-10-21 19:16:52,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334499108] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:52,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939342346] [2021-10-21 19:16:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:52,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:52,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:52,204 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:52,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:16:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:16:52,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 1181 proven. 590 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2021-10-21 19:16:53,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939342346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:53,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:53,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-10-21 19:16:53,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047808302] [2021-10-21 19:16:53,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-21 19:16:53,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:53,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-21 19:16:53,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2021-10-21 19:16:53,677 INFO L87 Difference]: Start difference. First operand 1254 states and 1444 transitions. Second operand has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:54,399 INFO L93 Difference]: Finished difference Result 2876 states and 3425 transitions. [2021-10-21 19:16:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-21 19:16:54,399 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-10-21 19:16:54,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:54,405 INFO L225 Difference]: With dead ends: 2876 [2021-10-21 19:16:54,405 INFO L226 Difference]: Without dead ends: 1781 [2021-10-21 19:16:54,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 912.4ms TimeCoverageRelationStatistics Valid=1654, Invalid=3748, Unknown=0, NotChecked=0, Total=5402 [2021-10-21 19:16:54,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-10-21 19:16:54,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1496. [2021-10-21 19:16:54,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 1.1812709030100335) internal successors, (1766), 1495 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 1766 transitions. [2021-10-21 19:16:54,569 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 1766 transitions. Word has length 138 [2021-10-21 19:16:54,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:54,570 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 1766 transitions. [2021-10-21 19:16:54,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 1766 transitions. [2021-10-21 19:16:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-10-21 19:16:54,573 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:54,573 INFO L512 BasicCegarLoop]: trace histogram [42, 42, 40, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:54,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:54,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:54,792 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:54,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:54,792 INFO L82 PathProgramCache]: Analyzing trace with hash 297433953, now seen corresponding path program 2 times [2021-10-21 19:16:54,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:54,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281674094] [2021-10-21 19:16:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:54,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 1368 proven. 651 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-10-21 19:16:55,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:55,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281674094] [2021-10-21 19:16:55,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281674094] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:55,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973949252] [2021-10-21 19:16:55,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:16:55,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:55,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:55,108 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:55,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 19:16:55,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:16:55,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:55,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 19:16:55,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 6 proven. 1975 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-10-21 19:16:56,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973949252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:56,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:56,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-10-21 19:16:56,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791155062] [2021-10-21 19:16:56,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-21 19:16:56,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-21 19:16:56,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=1561, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 19:16:56,847 INFO L87 Difference]: Start difference. First operand 1496 states and 1766 transitions. Second operand has 49 states, 49 states have (on average 3.2857142857142856) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:57,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:57,472 INFO L93 Difference]: Finished difference Result 2748 states and 3281 transitions. [2021-10-21 19:16:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-21 19:16:57,475 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.2857142857142856) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 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 147 [2021-10-21 19:16:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:57,487 INFO L225 Difference]: With dead ends: 2748 [2021-10-21 19:16:57,487 INFO L226 Difference]: Without dead ends: 1869 [2021-10-21 19:16:57,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 787.9ms TimeCoverageRelationStatistics Valid=1575, Invalid=3395, Unknown=0, NotChecked=0, Total=4970 [2021-10-21 19:16:57,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-10-21 19:16:57,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1506. [2021-10-21 19:16:57,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.1847176079734218) internal successors, (1783), 1505 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 1783 transitions. [2021-10-21 19:16:57,683 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 1783 transitions. Word has length 147 [2021-10-21 19:16:57,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:57,683 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 1783 transitions. [2021-10-21 19:16:57,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.2857142857142856) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 1783 transitions. [2021-10-21 19:16:57,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-10-21 19:16:57,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:57,686 INFO L512 BasicCegarLoop]: trace histogram [42, 42, 42, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:57,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:57,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:57,907 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:16:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:57,908 INFO L82 PathProgramCache]: Analyzing trace with hash -758927133, now seen corresponding path program 1 times [2021-10-21 19:16:57,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:57,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044551620] [2021-10-21 19:16:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:57,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 2 proven. 1371 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2021-10-21 19:16:57,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:57,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044551620] [2021-10-21 19:16:57,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044551620] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:57,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622062453] [2021-10-21 19:16:57,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:57,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:57,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:57,983 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:57,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 19:16:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:58,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:16:58,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 1367 proven. 651 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2021-10-21 19:16:59,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622062453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:59,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:59,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 24] total 27 [2021-10-21 19:16:59,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134667837] [2021-10-21 19:16:59,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-21 19:16:59,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-21 19:16:59,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=446, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:16:59,550 INFO L87 Difference]: Start difference. First operand 1506 states and 1783 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:01,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:17:01,242 INFO L93 Difference]: Finished difference Result 3583 states and 4220 transitions. [2021-10-21 19:17:01,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-21 19:17:01,243 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 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 147 [2021-10-21 19:17:01,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:17:01,251 INFO L225 Difference]: With dead ends: 3583 [2021-10-21 19:17:01,251 INFO L226 Difference]: Without dead ends: 2342 [2021-10-21 19:17:01,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 1511.2ms TimeCoverageRelationStatistics Valid=2973, Invalid=6147, Unknown=0, NotChecked=0, Total=9120 [2021-10-21 19:17:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-10-21 19:17:01,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1721. [2021-10-21 19:17:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 1.1808139534883721) internal successors, (2031), 1720 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 2031 transitions. [2021-10-21 19:17:01,400 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 2031 transitions. Word has length 147 [2021-10-21 19:17:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:17:01,401 INFO L470 AbstractCegarLoop]: Abstraction has 1721 states and 2031 transitions. [2021-10-21 19:17:01,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 2031 transitions. [2021-10-21 19:17:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-10-21 19:17:01,404 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:17:01,404 INFO L512 BasicCegarLoop]: trace histogram [44, 44, 42, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:17:01,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-21 19:17:01,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 19:17:01,631 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:17:01,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:17:01,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1034830995, now seen corresponding path program 3 times [2021-10-21 19:17:01,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:17:01,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361825694] [2021-10-21 19:17:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:17:01,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:17:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:17:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 1499 proven. 715 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2021-10-21 19:17:01,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:17:01,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361825694] [2021-10-21 19:17:01,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361825694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:01,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086841555] [2021-10-21 19:17:01,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:17:01,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:17:01,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:17:01,991 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:17:02,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 19:17:02,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:17:02,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:17:02,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:17:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:17:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 0 proven. 1504 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-10-21 19:17:03,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086841555] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:03,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:17:03,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 34 [2021-10-21 19:17:03,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274052357] [2021-10-21 19:17:03,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-21 19:17:03,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:17:03,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-21 19:17:03,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=823, Unknown=0, NotChecked=0, Total=1122 [2021-10-21 19:17:03,994 INFO L87 Difference]: Start difference. First operand 1721 states and 2031 transitions. Second operand has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 34 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) [2021-10-21 19:17:08,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:17:08,369 INFO L93 Difference]: Finished difference Result 3442 states and 4091 transitions. [2021-10-21 19:17:08,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-10-21 19:17:08,369 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 34 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 153 [2021-10-21 19:17:08,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:17:08,377 INFO L225 Difference]: With dead ends: 3442 [2021-10-21 19:17:08,377 INFO L226 Difference]: Without dead ends: 2356 [2021-10-21 19:17:08,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11383 ImplicationChecksByTransitivity, 4100.7ms TimeCoverageRelationStatistics Valid=5990, Invalid=26952, Unknown=0, NotChecked=0, Total=32942 [2021-10-21 19:17:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-10-21 19:17:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1810. [2021-10-21 19:17:08,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 1.1774461028192371) internal successors, (2130), 1809 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2130 transitions. [2021-10-21 19:17:08,513 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2130 transitions. Word has length 153 [2021-10-21 19:17:08,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:17:08,514 INFO L470 AbstractCegarLoop]: Abstraction has 1810 states and 2130 transitions. [2021-10-21 19:17:08,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 34 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) [2021-10-21 19:17:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2130 transitions. [2021-10-21 19:17:08,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-10-21 19:17:08,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:17:08,515 INFO L512 BasicCegarLoop]: trace histogram [45, 45, 44, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:17:08,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-21 19:17:08,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:17:08,716 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:17:08,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:17:08,716 INFO L82 PathProgramCache]: Analyzing trace with hash 882596709, now seen corresponding path program 1 times [2021-10-21 19:17:08,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:17:08,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823972421] [2021-10-21 19:17:08,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:17:08,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:17:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:17:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 1565 proven. 715 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-10-21 19:17:09,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:17:09,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823972421] [2021-10-21 19:17:09,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823972421] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:09,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433528056] [2021-10-21 19:17:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:17:09,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:17:09,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:17:09,085 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:17:09,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 19:17:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:17:10,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 19:17:10,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:17:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 1565 proven. 715 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-10-21 19:17:10,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433528056] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:10,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:17:10,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-10-21 19:17:10,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204590193] [2021-10-21 19:17:10,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-21 19:17:10,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:17:10,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-21 19:17:10,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=1429, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 19:17:10,782 INFO L87 Difference]: Start difference. First operand 1810 states and 2130 transitions. Second operand has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:11,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:17:11,099 INFO L93 Difference]: Finished difference Result 3392 states and 4017 transitions. [2021-10-21 19:17:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:17:11,099 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 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 156 [2021-10-21 19:17:11,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:17:11,107 INFO L225 Difference]: With dead ends: 3392 [2021-10-21 19:17:11,107 INFO L226 Difference]: Without dead ends: 1936 [2021-10-21 19:17:11,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 547.0ms TimeCoverageRelationStatistics Valid=923, Invalid=1429, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 19:17:11,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-10-21 19:17:11,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1869. [2021-10-21 19:17:11,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.1734475374732334) internal successors, (2192), 1868 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2192 transitions. [2021-10-21 19:17:11,235 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2192 transitions. Word has length 156 [2021-10-21 19:17:11,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:17:11,235 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2192 transitions. [2021-10-21 19:17:11,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2192 transitions. [2021-10-21 19:17:11,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-10-21 19:17:11,237 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:17:11,237 INFO L512 BasicCegarLoop]: trace histogram [46, 46, 45, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:17:11,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-21 19:17:11,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-21 19:17:11,438 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:17:11,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:17:11,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1319566561, now seen corresponding path program 2 times [2021-10-21 19:17:11,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:17:11,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319840303] [2021-10-21 19:17:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:17:11,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:17:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:17:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 1636 proven. 782 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2021-10-21 19:17:11,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:17:11,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319840303] [2021-10-21 19:17:11,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319840303] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:11,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732337427] [2021-10-21 19:17:11,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:17:11,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:17:11,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:17:11,827 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:17:11,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 19:17:12,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:17:12,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:17:12,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 19:17:12,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:17:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 1635 proven. 782 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-10-21 19:17:13,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732337427] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:13,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:17:13,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2021-10-21 19:17:13,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290260] [2021-10-21 19:17:13,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-21 19:17:13,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:17:13,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-21 19:17:13,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 19:17:13,917 INFO L87 Difference]: Start difference. First operand 1869 states and 2192 transitions. Second operand has 52 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:17:14,778 INFO L93 Difference]: Finished difference Result 4186 states and 5017 transitions. [2021-10-21 19:17:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-21 19:17:14,779 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 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 159 [2021-10-21 19:17:14,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:17:14,787 INFO L225 Difference]: With dead ends: 4186 [2021-10-21 19:17:14,787 INFO L226 Difference]: Without dead ends: 2509 [2021-10-21 19:17:14,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 1134.5ms TimeCoverageRelationStatistics Valid=2098, Invalid=4708, Unknown=0, NotChecked=0, Total=6806 [2021-10-21 19:17:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-10-21 19:17:14,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1941. [2021-10-21 19:17:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 1.172680412371134) internal successors, (2275), 1940 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2275 transitions. [2021-10-21 19:17:14,955 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2275 transitions. Word has length 159 [2021-10-21 19:17:14,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:17:14,955 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 2275 transitions. [2021-10-21 19:17:14,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2275 transitions. [2021-10-21 19:17:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-21 19:17:14,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:17:14,957 INFO L512 BasicCegarLoop]: trace histogram [48, 48, 47, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:17:14,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-21 19:17:15,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-21 19:17:15,158 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:17:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:17:15,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1553693227, now seen corresponding path program 3 times [2021-10-21 19:17:15,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:17:15,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681433505] [2021-10-21 19:17:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:17:15,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:17:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:17:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 1779 proven. 852 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2021-10-21 19:17:15,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:17:15,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681433505] [2021-10-21 19:17:15,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681433505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:15,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776416679] [2021-10-21 19:17:15,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:17:15,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:17:15,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:17:15,505 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:17:15,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 19:17:16,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:17:16,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:17:16,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:17:16,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:17:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 3386 trivial. 0 not checked. [2021-10-21 19:17:16,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776416679] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:17:16,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:17:16,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [28] total 32 [2021-10-21 19:17:16,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127547735] [2021-10-21 19:17:16,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:17:16,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:17:16,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:17:16,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=653, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:17:16,861 INFO L87 Difference]: Start difference. First operand 1941 states and 2275 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) [2021-10-21 19:17:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:17:17,017 INFO L93 Difference]: Finished difference Result 2712 states and 3137 transitions. [2021-10-21 19:17:17,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:17:17,018 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 165 [2021-10-21 19:17:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:17:17,020 INFO L225 Difference]: With dead ends: 2712 [2021-10-21 19:17:17,020 INFO L226 Difference]: Without dead ends: 1328 [2021-10-21 19:17:17,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2021-10-21 19:17:17,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-10-21 19:17:17,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1178. [2021-10-21 19:17:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 1.1257434154630417) internal successors, (1325), 1177 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1325 transitions. [2021-10-21 19:17:17,158 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1325 transitions. Word has length 165 [2021-10-21 19:17:17,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:17:17,158 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 1325 transitions. [2021-10-21 19:17:17,158 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) [2021-10-21 19:17:17,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1325 transitions. [2021-10-21 19:17:17,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-21 19:17:17,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:17:17,160 INFO L512 BasicCegarLoop]: trace histogram [48, 48, 47, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:17:17,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-21 19:17:17,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:17:17,371 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:17:17,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:17:17,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1555540269, now seen corresponding path program 7 times [2021-10-21 19:17:17,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:17:17,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732490079] [2021-10-21 19:17:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:17:17,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:17:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:17:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 913 proven. 2575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:17:18,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:17:18,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732490079] [2021-10-21 19:17:18,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732490079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:18,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193542433] [2021-10-21 19:17:18,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:17:18,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:17:18,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:17:18,247 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:17:18,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-21 19:17:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:17:19,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-21 19:17:19,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:17:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 1778 proven. 852 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2021-10-21 19:17:20,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193542433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:20,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:17:20,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 27] total 77 [2021-10-21 19:17:20,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634018512] [2021-10-21 19:17:20,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-10-21 19:17:20,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:17:20,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-10-21 19:17:20,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1329, Invalid=4523, Unknown=0, NotChecked=0, Total=5852 [2021-10-21 19:17:20,460 INFO L87 Difference]: Start difference. First operand 1178 states and 1325 transitions. Second operand has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:17:21,979 INFO L93 Difference]: Finished difference Result 2412 states and 2752 transitions. [2021-10-21 19:17:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-10-21 19:17:21,980 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 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 165 [2021-10-21 19:17:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:17:21,982 INFO L225 Difference]: With dead ends: 2412 [2021-10-21 19:17:21,982 INFO L226 Difference]: Without dead ends: 1441 [2021-10-21 19:17:21,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4685 ImplicationChecksByTransitivity, 2247.8ms TimeCoverageRelationStatistics Valid=4308, Invalid=12204, Unknown=0, NotChecked=0, Total=16512 [2021-10-21 19:17:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-10-21 19:17:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1211. [2021-10-21 19:17:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 1.1231404958677687) internal successors, (1359), 1210 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1359 transitions. [2021-10-21 19:17:22,142 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1359 transitions. Word has length 165 [2021-10-21 19:17:22,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:17:22,142 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 1359 transitions. [2021-10-21 19:17:22,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:22,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1359 transitions. [2021-10-21 19:17:22,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-21 19:17:22,145 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:17:22,145 INFO L512 BasicCegarLoop]: trace histogram [50, 50, 49, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:17:22,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-21 19:17:22,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-21 19:17:22,359 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:17:22,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:17:22,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1830883295, now seen corresponding path program 8 times [2021-10-21 19:17:22,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:17:22,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107237284] [2021-10-21 19:17:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:17:22,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:17:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:17:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 988 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:17:23,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:17:23,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107237284] [2021-10-21 19:17:23,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107237284] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:23,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36142251] [2021-10-21 19:17:23,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:17:23,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:17:23,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:17:23,326 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:17:23,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 19:17:24,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:17:24,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:17:24,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-21 19:17:24,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:17:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 1927 proven. 925 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2021-10-21 19:17:25,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36142251] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:25,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:17:25,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 28] total 80 [2021-10-21 19:17:25,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121981003] [2021-10-21 19:17:25,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-10-21 19:17:25,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:17:25,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-10-21 19:17:25,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1434, Invalid=4886, Unknown=0, NotChecked=0, Total=6320 [2021-10-21 19:17:25,618 INFO L87 Difference]: Start difference. First operand 1211 states and 1359 transitions. Second operand has 80 states, 80 states have (on average 3.2125) internal successors, (257), 80 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:27,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:17:27,137 INFO L93 Difference]: Finished difference Result 2481 states and 2824 transitions. [2021-10-21 19:17:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-10-21 19:17:27,137 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.2125) internal successors, (257), 80 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-10-21 19:17:27,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:17:27,139 INFO L225 Difference]: With dead ends: 2481 [2021-10-21 19:17:27,139 INFO L226 Difference]: Without dead ends: 1486 [2021-10-21 19:17:27,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5068 ImplicationChecksByTransitivity, 2362.5ms TimeCoverageRelationStatistics Valid=4649, Invalid=13173, Unknown=0, NotChecked=0, Total=17822 [2021-10-21 19:17:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-10-21 19:17:27,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1433. [2021-10-21 19:17:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.1410614525139664) internal successors, (1634), 1432 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1634 transitions. [2021-10-21 19:17:27,260 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1634 transitions. Word has length 171 [2021-10-21 19:17:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:17:27,260 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 1634 transitions. [2021-10-21 19:17:27,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.2125) internal successors, (257), 80 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1634 transitions. [2021-10-21 19:17:27,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-10-21 19:17:27,262 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:17:27,263 INFO L512 BasicCegarLoop]: trace histogram [52, 52, 51, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:17:27,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-21 19:17:27,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-21 19:17:27,467 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:17:27,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:17:27,468 INFO L82 PathProgramCache]: Analyzing trace with hash 505372205, now seen corresponding path program 9 times [2021-10-21 19:17:27,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:17:27,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678517415] [2021-10-21 19:17:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:17:27,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:17:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:17:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 1066 proven. 3024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:17:28,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:17:28,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678517415] [2021-10-21 19:17:28,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678517415] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:28,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328475743] [2021-10-21 19:17:28,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:17:28,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:17:28,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:17:28,431 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:17:28,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-21 19:17:29,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:17:29,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:17:29,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:17:29,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:17:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 2088 proven. 51 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2021-10-21 19:17:30,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328475743] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:30,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:17:30,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 7] total 60 [2021-10-21 19:17:30,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218129888] [2021-10-21 19:17:30,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-10-21 19:17:30,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:17:30,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-10-21 19:17:30,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=2745, Unknown=0, NotChecked=0, Total=3540 [2021-10-21 19:17:30,141 INFO L87 Difference]: Start difference. First operand 1433 states and 1634 transitions. Second operand has 60 states, 60 states have (on average 3.2666666666666666) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:17:39,489 INFO L93 Difference]: Finished difference Result 2528 states and 2889 transitions. [2021-10-21 19:17:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2021-10-21 19:17:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.2666666666666666) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 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 177 [2021-10-21 19:17:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:17:39,492 INFO L225 Difference]: With dead ends: 2528 [2021-10-21 19:17:39,492 INFO L226 Difference]: Without dead ends: 1913 [2021-10-21 19:17:39,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47218 ImplicationChecksByTransitivity, 9303.7ms TimeCoverageRelationStatistics Valid=22272, Invalid=99180, Unknown=0, NotChecked=0, Total=121452 [2021-10-21 19:17:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-10-21 19:17:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1807. [2021-10-21 19:17:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 1.1450719822812847) internal successors, (2068), 1806 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2068 transitions. [2021-10-21 19:17:39,653 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2068 transitions. Word has length 177 [2021-10-21 19:17:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:17:39,653 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 2068 transitions. [2021-10-21 19:17:39,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.2666666666666666) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2068 transitions. [2021-10-21 19:17:39,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-10-21 19:17:39,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:17:39,658 INFO L512 BasicCegarLoop]: trace histogram [78, 78, 75, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:17:39,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-21 19:17:39,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-21 19:17:39,883 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:17:39,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:17:39,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1331899705, now seen corresponding path program 4 times [2021-10-21 19:17:39,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:17:39,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486592755] [2021-10-21 19:17:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:17:39,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:17:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:17:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9267 backedges. 4164 proven. 1001 refuted. 0 times theorem prover too weak. 4102 trivial. 0 not checked. [2021-10-21 19:17:40,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:17:40,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486592755] [2021-10-21 19:17:40,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486592755] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:40,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118536860] [2021-10-21 19:17:40,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:17:40,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:17:40,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:17:40,349 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:17:40,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-21 19:17:41,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:17:41,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:17:41,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 74 conjunts are in the unsatisfiable core [2021-10-21 19:17:41,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:17:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9267 backedges. 925 proven. 7341 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2021-10-21 19:17:45,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118536860] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:45,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:17:45,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 62] total 90 [2021-10-21 19:17:45,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471899248] [2021-10-21 19:17:45,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-10-21 19:17:45,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:17:45,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-10-21 19:17:45,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1261, Invalid=6749, Unknown=0, NotChecked=0, Total=8010 [2021-10-21 19:17:45,904 INFO L87 Difference]: Start difference. First operand 1807 states and 2068 transitions. Second operand has 90 states, 90 states have (on average 3.1777777777777776) internal successors, (286), 90 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:49,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:17:49,859 INFO L93 Difference]: Finished difference Result 3488 states and 4035 transitions. [2021-10-21 19:17:49,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-10-21 19:17:49,859 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.1777777777777776) internal successors, (286), 90 states have internal predecessors, (286), 0 states have call successors, (0), 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 263 [2021-10-21 19:17:49,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:17:49,862 INFO L225 Difference]: With dead ends: 3488 [2021-10-21 19:17:49,862 INFO L226 Difference]: Without dead ends: 2293 [2021-10-21 19:17:49,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13421 ImplicationChecksByTransitivity, 4922.6ms TimeCoverageRelationStatistics Valid=6210, Invalid=33590, Unknown=0, NotChecked=0, Total=39800 [2021-10-21 19:17:49,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-10-21 19:17:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1662. [2021-10-21 19:17:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 1.1523178807947019) internal successors, (1914), 1661 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 1914 transitions. [2021-10-21 19:17:49,994 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 1914 transitions. Word has length 263 [2021-10-21 19:17:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:17:49,994 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 1914 transitions. [2021-10-21 19:17:49,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.1777777777777776) internal successors, (286), 90 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:49,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 1914 transitions. [2021-10-21 19:17:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-10-21 19:17:49,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:17:49,998 INFO L512 BasicCegarLoop]: trace histogram [81, 81, 78, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:17:50,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-21 19:17:50,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:17:50,211 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:17:50,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:17:50,212 INFO L82 PathProgramCache]: Analyzing trace with hash -282690071, now seen corresponding path program 5 times [2021-10-21 19:17:50,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:17:50,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545290454] [2021-10-21 19:17:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:17:50,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:17:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:17:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9987 backedges. 4486 proven. 1080 refuted. 0 times theorem prover too weak. 4421 trivial. 0 not checked. [2021-10-21 19:17:50,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:17:50,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545290454] [2021-10-21 19:17:50,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545290454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:50,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043401310] [2021-10-21 19:17:50,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:17:50,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:17:50,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:17:50,676 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:17:50,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-21 19:17:52,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2021-10-21 19:17:52,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:17:52,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 19:17:52,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:17:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9987 backedges. 4486 proven. 1080 refuted. 0 times theorem prover too weak. 4421 trivial. 0 not checked. [2021-10-21 19:17:53,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043401310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:53,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:17:53,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-10-21 19:17:53,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037638913] [2021-10-21 19:17:53,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-21 19:17:53,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:17:53,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-21 19:17:53,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=2089, Unknown=0, NotChecked=0, Total=3422 [2021-10-21 19:17:53,493 INFO L87 Difference]: Start difference. First operand 1662 states and 1914 transitions. Second operand has 59 states, 59 states have (on average 3.1186440677966103) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:53,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:17:53,785 INFO L93 Difference]: Finished difference Result 3197 states and 3696 transitions. [2021-10-21 19:17:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-21 19:17:53,786 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.1186440677966103) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 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 272 [2021-10-21 19:17:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:17:53,788 INFO L225 Difference]: With dead ends: 3197 [2021-10-21 19:17:53,788 INFO L226 Difference]: Without dead ends: 1782 [2021-10-21 19:17:53,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 770.6ms TimeCoverageRelationStatistics Valid=1333, Invalid=2089, Unknown=0, NotChecked=0, Total=3422 [2021-10-21 19:17:53,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-10-21 19:17:53,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1725. [2021-10-21 19:17:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.148491879350348) internal successors, (1980), 1724 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 1980 transitions. [2021-10-21 19:17:53,916 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 1980 transitions. Word has length 272 [2021-10-21 19:17:53,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:17:53,917 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 1980 transitions. [2021-10-21 19:17:53,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.1186440677966103) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:53,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 1980 transitions. [2021-10-21 19:17:53,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-10-21 19:17:53,921 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:17:53,921 INFO L512 BasicCegarLoop]: trace histogram [84, 84, 81, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:17:53,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-21 19:17:54,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:17:54,147 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:17:54,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:17:54,148 INFO L82 PathProgramCache]: Analyzing trace with hash -407080135, now seen corresponding path program 6 times [2021-10-21 19:17:54,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:17:54,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526736656] [2021-10-21 19:17:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:17:54,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:17:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:17:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10734 backedges. 4820 proven. 1162 refuted. 0 times theorem prover too weak. 4752 trivial. 0 not checked. [2021-10-21 19:17:54,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:17:54,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526736656] [2021-10-21 19:17:54,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526736656] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:54,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934058853] [2021-10-21 19:17:54,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:17:54,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:17:54,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:17:54,638 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:17:54,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-21 19:17:56,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-21 19:17:56,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:17:56,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:17:56,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:17:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10734 backedges. 4914 proven. 1 refuted. 0 times theorem prover too weak. 5819 trivial. 0 not checked. [2021-10-21 19:17:56,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934058853] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:17:56,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:17:56,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 8] total 38 [2021-10-21 19:17:56,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572241925] [2021-10-21 19:17:56,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-21 19:17:56,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:17:56,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-21 19:17:56,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=921, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 19:17:56,908 INFO L87 Difference]: Start difference. First operand 1725 states and 1980 transitions. Second operand has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:58,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:17:58,994 INFO L93 Difference]: Finished difference Result 3341 states and 3870 transitions. [2021-10-21 19:17:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-21 19:17:58,994 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 0 states have call successors, (0), 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 281 [2021-10-21 19:17:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:17:58,995 INFO L225 Difference]: With dead ends: 3341 [2021-10-21 19:17:58,995 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:17:58,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 2027.1ms TimeCoverageRelationStatistics Valid=3231, Invalid=7071, Unknown=0, NotChecked=0, Total=10302 [2021-10-21 19:17:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:17:58,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:17:58,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:58,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:17:58,998 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 281 [2021-10-21 19:17:58,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:17:58,998 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:17:58,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:17:58,999 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:17:58,999 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:17:59,001 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:17:59,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-21 19:17:59,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-21 19:17:59,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-21 19:17:59,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:19:03,115 WARN L207 SmtUtils]: Spent 1.06 m on a formula simplification. DAG size of input: 5989 DAG size of output: 3713 [2021-10-21 19:19:03,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:19:03,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:21:18,346 WARN L207 SmtUtils]: Spent 2.25 m on a formula simplification. DAG size of input: 3366 DAG size of output: 301 [2021-10-21 19:21:18,763 INFO L857 garLoopResultBuilder]: For program point L27-2(lines 27 29) no Hoare annotation was computed. [2021-10-21 19:21:18,765 INFO L853 garLoopResultBuilder]: At program point L27-3(lines 27 29) the Hoare annotation is: (let ((.cse13 (+ ~last~0 1)) (.cse14 (<= (+ ULTIMATE.start_main_~d~0 199998) ~SIZE~0)) (.cse15 (<= (+ ~last~0 199978) ~SIZE~0)) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse2 (= ULTIMATE.start_main_~d~0 0)) (.cse3 (< 0 ~last~0)) (.cse5 (= ULTIMATE.start_main_~st~0 1))) (let ((.cse11 (<= ULTIMATE.start_main_~c~0 21)) (.cse20 (<= ULTIMATE.start_main_~c~0 10)) (.cse21 (<= ~last~0 23)) (.cse22 (= ULTIMATE.start_main_~c~0 0)) (.cse16 (<= ULTIMATE.start_main_~c~0 7)) (.cse28 (<= ULTIMATE.start_main_~c~0 13)) (.cse4 (<= ULTIMATE.start_main_~c~0 1)) (.cse23 (<= 3 ULTIMATE.start_main_~c~0)) (.cse24 (<= ULTIMATE.start_main_~c~0 3)) (.cse17 (<= ULTIMATE.start_main_~c~0 5)) (.cse26 (<= ULTIMATE.start_main_~c~0 12)) (.cse25 (<= ULTIMATE.start_main_~c~0 19)) (.cse27 (<= ULTIMATE.start_main_~c~0 20)) (.cse7 (or (and .cse0 .cse14 .cse15 .cse3 .cse5) (and .cse0 .cse2 .cse3 .cse5))) (.cse8 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse9 (< ULTIMATE.start_main_~c~0 .cse13)) (.cse12 (< ULTIMATE.start_main_~c~0 (+ ~SIZE~0 1))) (.cse1 (= ULTIMATE.start_main_~b~0 0)) (.cse18 (<= .cse13 ULTIMATE.start_main_~c~0)) (.cse19 (= ULTIMATE.start_main_~st~0 0)) (.cse10 (<= 200000 ~SIZE~0)) (.cse6 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0))) (or (and .cse0 .cse1 (<= 1 ULTIMATE.start_main_~c~0) .cse2 .cse3 .cse4 .cse5 .cse6 (<= (+ ULTIMATE.start_main_~c~0 199999) ~SIZE~0)) (and (<= ULTIMATE.start_main_~c~0 14) .cse7 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 9)) .cse8 .cse9 .cse10 .cse6) (and .cse0 .cse1 (<= 21 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse11 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 2)) .cse7 .cse8 .cse9 .cse11 .cse10 .cse6) (and .cse12 .cse0 .cse8 (< ~SIZE~0 .cse13) .cse2 .cse5 .cse10 .cse6) (and .cse0 .cse14 .cse8 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 16)) .cse15 .cse9 .cse3 .cse16 .cse5 .cse10 .cse6) (and .cse0 (<= 5 ULTIMATE.start_main_~c~0) .cse1 .cse17 .cse2 .cse9 .cse5 .cse10 .cse6) (and .cse12 .cse0 .cse8 .cse18 .cse2 .cse19 .cse3 .cse10 .cse6) (and (<= ULTIMATE.start_main_~c~0 4) .cse0 .cse14 (<= ~last~0 (+ 19 ULTIMATE.start_main_~c~0)) .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199994) ~SIZE~0) (<= 6 ULTIMATE.start_main_~c~0) .cse5 .cse6) (and .cse0 (<= ULTIMATE.start_main_~c~0 15) .cse14 .cse8 .cse15 .cse9 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 8)) .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse14 .cse8 .cse15 .cse9 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 13)) .cse3 .cse5 .cse10 .cse6 .cse20) (and (<= ULTIMATE.start_main_~c~0 2) .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 21)) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and (<= 24 ULTIMATE.start_main_~c~0) .cse0 .cse1 .cse2 .cse9 (<= ULTIMATE.start_main_~c~0 24) .cse5 .cse10 .cse6) (and .cse0 .cse14 .cse8 .cse15 .cse3 .cse21 .cse5 .cse10 .cse6 .cse22) (and .cse12 .cse0 .cse1 .cse2 .cse9 (<= 25 ULTIMATE.start_main_~c~0) .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199991) ~SIZE~0) .cse2 .cse9 .cse5 .cse6 (<= 9 ULTIMATE.start_main_~c~0)) (and .cse0 .cse14 (<= ~last~0 ULTIMATE.start_main_~c~0) .cse8 (<= ULTIMATE.start_main_~c~0 23) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199978) ~SIZE~0) .cse2 .cse9 (<= 22 ULTIMATE.start_main_~c~0) .cse5 .cse6) (and .cse0 .cse1 (<= 10 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse5 .cse10 .cse6 .cse20) (and .cse12 .cse0 .cse14 .cse8 .cse18 .cse15 .cse19 .cse3 .cse21 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse9 (<= 16 ULTIMATE.start_main_~c~0) .cse5 .cse6 (<= (+ 199984 ULTIMATE.start_main_~c~0) ~SIZE~0)) (and .cse23 .cse0 .cse1 .cse24 .cse2 .cse9 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199986) ~SIZE~0) (<= 14 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse5 .cse6) (and .cse0 .cse14 .cse8 .cse25 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 4))) (and .cse0 .cse1 (<= 23 ULTIMATE.start_main_~c~0) (<= (+ ULTIMATE.start_main_~c~0 199977) ~SIZE~0) .cse2 .cse9 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse3 .cse5 .cse10 .cse6 .cse22) (and .cse0 .cse1 (<= 12 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse26 .cse5 .cse10 .cse6) (and (<= 7 ULTIMATE.start_main_~c~0) .cse0 .cse1 .cse2 .cse9 .cse16 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= 18 ULTIMATE.start_main_~c~0) .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199982) ~SIZE~0) .cse5 .cse6) (and .cse0 (<= ULTIMATE.start_main_~c~0 8) .cse14 .cse8 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 15)) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= 11 ULTIMATE.start_main_~c~0) .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199989) ~SIZE~0) .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse9 .cse27 .cse5 .cse10 (<= 20 ULTIMATE.start_main_~c~0) .cse6) (and .cse0 (<= ULTIMATE.start_main_~c~0 17) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 6))) (and .cse0 .cse14 .cse8 .cse28 .cse15 .cse9 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 10)) .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= 13 ULTIMATE.start_main_~c~0) .cse28 .cse2 .cse9 .cse5 .cse10 .cse6) (and .cse0 (< ULTIMATE.start_main_~c~0 ~SIZE~0) .cse8 .cse2 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse14 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 22)) .cse8 .cse15 .cse3 .cse4 .cse5 .cse10 .cse6) (and (<= ULTIMATE.start_main_~c~0 18) .cse0 .cse14 .cse8 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 5)) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse9 .cse5 .cse6 (<= (+ ULTIMATE.start_main_~c~0 199992) ~SIZE~0) (<= 8 ULTIMATE.start_main_~c~0)) (and .cse0 (<= ULTIMATE.start_main_~c~0 9) .cse14 .cse8 .cse15 .cse9 .cse3 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 14)) .cse5 .cse10 .cse6) (and (<= ULTIMATE.start_main_~c~0 11) .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 12)) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 20)) .cse0 .cse24 .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse23 .cse0 (<= ~last~0 3) .cse24 .cse14 .cse8 .cse3 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 18)) .cse0 .cse14 .cse17 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse14 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 17)) .cse8 (<= ULTIMATE.start_main_~c~0 6) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199983) ~SIZE~0) (<= 17 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse9 (<= 2 ULTIMATE.start_main_~c~0) (<= (+ ULTIMATE.start_main_~c~0 199998) ~SIZE~0) .cse5 .cse6) (and (<= (+ 199996 ULTIMATE.start_main_~c~0) ~SIZE~0) .cse0 .cse1 .cse2 .cse9 .cse5 .cse6 (<= 4 ULTIMATE.start_main_~c~0)) (and .cse0 .cse1 (<= 15 ULTIMATE.start_main_~c~0) .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199985) ~SIZE~0) .cse5 .cse6) (and .cse7 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 11)) .cse8 .cse9 .cse26 .cse10 .cse6) (and .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 1)) (<= ULTIMATE.start_main_~c~0 22) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse25 .cse9 (<= 19 ULTIMATE.start_main_~c~0) .cse5 .cse10 .cse6) (and .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 3)) .cse14 .cse8 .cse15 .cse9 .cse27 .cse3 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 7)) (<= ULTIMATE.start_main_~c~0 16) .cse7 .cse8 .cse9 .cse10 .cse6) (and .cse12 .cse0 .cse1 .cse18 .cse2 .cse19 .cse3 .cse10 .cse6)))) [2021-10-21 19:21:18,765 INFO L857 garLoopResultBuilder]: For program point L27-4(lines 25 45) no Hoare annotation was computed. [2021-10-21 19:21:18,765 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2021-10-21 19:21:18,765 INFO L853 garLoopResultBuilder]: At program point L11-2(lines 10 45) the Hoare annotation is: (let ((.cse0 (< ULTIMATE.start_main_~c~0 (+ ~SIZE~0 1))) (.cse1 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse2 (<= ~SIZE~0 ULTIMATE.start_main_~c~0)) (.cse3 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse7 (= ULTIMATE.start_main_~d~0 0)) (.cse4 (< 0 ~last~0)) (.cse5 (<= 200000 ~SIZE~0)) (.cse6 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0))) (or (and .cse0 .cse1 .cse2 (<= (+ ULTIMATE.start_main_~d~0 199998) ~SIZE~0) .cse3 (<= (+ ~last~0 199978) ~SIZE~0) .cse4 (<= ~last~0 23) .cse5 .cse6) (and .cse1 (= ULTIMATE.start_main_~b~0 0) .cse7 .cse4 .cse5 .cse6 (= ULTIMATE.start_main_~c~0 0)) (and .cse0 .cse1 .cse2 .cse3 .cse7 .cse4 .cse5 .cse6))) [2021-10-21 19:21:18,766 INFO L857 garLoopResultBuilder]: For program point L36(lines 36 38) no Hoare annotation was computed. [2021-10-21 19:21:18,766 INFO L857 garLoopResultBuilder]: For program point L36-2(lines 25 45) no Hoare annotation was computed. [2021-10-21 19:21:18,766 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-21 19:21:18,766 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-21 19:21:18,766 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-21 19:21:18,766 INFO L857 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-10-21 19:21:18,766 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-10-21 19:21:18,766 INFO L857 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-10-21 19:21:18,766 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-21 19:21:18,766 INFO L857 garLoopResultBuilder]: For program point L25-2(lines 25 45) no Hoare annotation was computed. [2021-10-21 19:21:18,766 INFO L853 garLoopResultBuilder]: At program point L46(lines 20 47) the Hoare annotation is: false [2021-10-21 19:21:18,766 INFO L857 garLoopResultBuilder]: For program point L5(lines 5 7) no Hoare annotation was computed. [2021-10-21 19:21:18,767 INFO L857 garLoopResultBuilder]: For program point L30-1(lines 25 45) no Hoare annotation was computed. [2021-10-21 19:21:18,767 INFO L857 garLoopResultBuilder]: For program point L6(line 6) no Hoare annotation was computed. [2021-10-21 19:21:18,767 INFO L857 garLoopResultBuilder]: For program point L39-1(lines 39 42) no Hoare annotation was computed. [2021-10-21 19:21:18,771 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:21:18,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:21:18 BoogieIcfgContainer [2021-10-21 19:21:18,837 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:21:18,837 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:21:18,837 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:21:18,838 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:21:18,838 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:16:16" (3/4) ... [2021-10-21 19:21:18,841 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:21:18,853 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-21 19:21:18,854 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 19:21:18,854 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:21:18,854 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:21:18,903 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:21:18,903 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:21:18,904 INFO L168 Benchmark]: Toolchain (without parser) took 303621.65 ms. Allocated memory was 107.0 MB in the beginning and 5.7 GB in the end (delta: 5.6 GB). Free memory was 63.2 MB in the beginning and 4.9 GB in the end (delta: -4.8 GB). Peak memory consumption was 747.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:21:18,904 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 107.0 MB. Free memory is still 79.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:21:18,905 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.06 ms. Allocated memory is still 107.0 MB. Free memory was 63.0 MB in the beginning and 81.1 MB in the end (delta: -18.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:21:18,906 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.90 ms. Allocated memory is still 107.0 MB. Free memory was 80.9 MB in the beginning and 79.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:21:18,907 INFO L168 Benchmark]: Boogie Preprocessor took 23.22 ms. Allocated memory is still 107.0 MB. Free memory was 79.5 MB in the beginning and 78.5 MB in the end (delta: 978.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:21:18,907 INFO L168 Benchmark]: RCFGBuilder took 344.52 ms. Allocated memory is still 107.0 MB. Free memory was 78.5 MB in the beginning and 68.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:21:18,907 INFO L168 Benchmark]: TraceAbstraction took 302828.42 ms. Allocated memory was 107.0 MB in the beginning and 5.7 GB in the end (delta: 5.6 GB). Free memory was 67.7 MB in the beginning and 4.9 GB in the end (delta: -4.8 GB). Peak memory consumption was 3.4 GB. Max. memory is 16.1 GB. [2021-10-21 19:21:18,908 INFO L168 Benchmark]: Witness Printer took 65.52 ms. Allocated memory is still 5.7 GB. Free memory was 4.9 GB in the beginning and 4.9 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:21:18,910 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 107.0 MB. Free memory is still 79.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 300.06 ms. Allocated memory is still 107.0 MB. Free memory was 63.0 MB in the beginning and 81.1 MB in the end (delta: -18.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.90 ms. Allocated memory is still 107.0 MB. Free memory was 80.9 MB in the beginning and 79.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.22 ms. Allocated memory is still 107.0 MB. Free memory was 79.5 MB in the beginning and 78.5 MB in the end (delta: 978.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 344.52 ms. Allocated memory is still 107.0 MB. Free memory was 78.5 MB in the beginning and 68.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 302828.42 ms. Allocated memory was 107.0 MB in the beginning and 5.7 GB in the end (delta: 5.6 GB). Free memory was 67.7 MB in the beginning and 4.9 GB in the end (delta: -4.8 GB). Peak memory consumption was 3.4 GB. Max. memory is 16.1 GB. * Witness Printer took 65.52 ms. Allocated memory is still 5.7 GB. Free memory was 4.9 GB in the beginning and 4.9 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 302672.3ms, OverallIterations: 43, TraceHistogramMax: 84, EmptinessCheckTime: 91.8ms, AutomataDifference: 38846.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 199561.1ms, InitialAbstractionConstructionTime: 13.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 600 SDtfs, 10075 SDslu, 1217 SDs, 0 SdLazy, 11151 SolverSat, 2479 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5825.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5567 GetRequests, 3280 SyntacticMatches, 0 SemanticMatches, 2287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108761 ImplicationChecksByTransitivity, 40038.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1941occurred in iteration=36, InterpolantAutomatonStates: 1668, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3270.5ms AutomataMinimizationTime, 43 MinimizatonAttempts, 10035 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 646 NumberOfFragments, 2105 HoareAnnotationTreeSize, 3 FomulaSimplifications, 63740626284713 FormulaSimplificationTreeSizeReduction, 64192.9ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 12598421229953 FormulaSimplificationTreeSizeReductionInter, 135333.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 396.0ms SsaConstructionTime, 1533.7ms SatisfiabilityAnalysisTime, 31995.5ms InterpolantComputationTime, 7670 NumberOfCodeBlocks, 6667 NumberOfCodeBlocksAsserted, 181 NumberOfCheckSat, 7592 ConstructedInterpolants, 0 QuantifiedInterpolants, 29362 SizeOfPredicates, 120 NumberOfNonLiveVariables, 6478 ConjunctsInSsa, 582 ConjunctsInUnsatCore, 78 InterpolantComputations, 13 PerfectInterpolantSequences, 105695/148357 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((cond == 1 && b == 0) && 1 <= c) && d == 0) && 0 < last) && c <= 1) && st == 1) && b == a) && c + 199999 <= SIZE) || ((((((c <= 14 && (((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1))) && last <= c + 9) && 1 == cond) && c < last + 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && b == 0) && 21 <= c) && d == 0) && c < last + 1) && c <= 21) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((last <= c + 2 && (((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1))) && 1 == cond) && c < last + 1) && c <= 21) && 200000 <= SIZE) && b == a)) || (((((((c < SIZE + 1 && cond == 1) && 1 == cond) && SIZE < last + 1) && d == 0) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && last <= c + 16) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && c <= 7) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && 5 <= c) && b == 0) && c <= 5) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((c < SIZE + 1 && cond == 1) && 1 == cond) && last + 1 <= c) && d == 0) && st == 0) && 0 < last) && 200000 <= SIZE) && b == a)) || ((((((((((c <= 4 && cond == 1) && d + 199998 <= SIZE) && last <= 19 + c) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && c + 199994 <= SIZE) && 6 <= c) && st == 1) && b == a)) || ((((((((((cond == 1 && c <= 15) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && last <= c + 8) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && last <= c + 13) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && c <= 10)) || ((((((((((c <= 2 && cond == 1) && last <= c + 21) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((24 <= c && cond == 1) && b == 0) && d == 0) && c < last + 1) && c <= 24) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && 0 < last) && last <= 23) && st == 1) && 200000 <= SIZE) && b == a) && c == 0)) || ((((((((c < SIZE + 1 && cond == 1) && b == 0) && d == 0) && c < last + 1) && 25 <= c) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199991 <= SIZE) && d == 0) && c < last + 1) && st == 1) && b == a) && 9 <= c)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && last <= c) && 1 == cond) && c <= 23) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199978 <= SIZE) && d == 0) && c < last + 1) && 22 <= c) && st == 1) && b == a)) || ((((((((cond == 1 && b == 0) && 10 <= c) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a) && c <= 10)) || ((((((((((c < SIZE + 1 && cond == 1) && d + 199998 <= SIZE) && 1 == cond) && last + 1 <= c) && last + 199978 <= SIZE) && st == 0) && 0 < last) && last <= 23) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && 16 <= c) && st == 1) && b == a) && 199984 + c <= SIZE)) || ((((((((3 <= c && cond == 1) && b == 0) && c <= 3) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199986 <= SIZE) && 14 <= c) && d == 0) && c < last + 1) && st == 1) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && c <= 19) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && last <= c + 4)) || (((((((cond == 1 && b == 0) && 23 <= c) && c + 199977 <= SIZE) && d == 0) && c < last + 1) && st == 1) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && c == 0)) || ((((((((cond == 1 && b == 0) && 12 <= c) && d == 0) && c < last + 1) && c <= 12) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((7 <= c && cond == 1) && b == 0) && d == 0) && c < last + 1) && c <= 7) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && 18 <= c) && d == 0) && c < last + 1) && c + 199982 <= SIZE) && st == 1) && b == a)) || ((((((((((cond == 1 && c <= 8) && d + 199998 <= SIZE) && 1 == cond) && last <= c + 15) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && 11 <= c) && d == 0) && c < last + 1) && c + 199989 <= SIZE) && st == 1) && b == a)) || ((((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && c <= 20) && st == 1) && 200000 <= SIZE) && 20 <= c) && b == a)) || ((((((((((cond == 1 && c <= 17) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && last <= c + 6)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && c <= 13) && last + 199978 <= SIZE) && c < last + 1) && last <= c + 10) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && b == 0) && 13 <= c) && c <= 13) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && c < SIZE) && 1 == cond) && d == 0) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((((cond == 1 && d + 199998 <= SIZE) && last <= c + 22) && 1 == cond) && last + 199978 <= SIZE) && 0 < last) && c <= 1) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((c <= 18 && cond == 1) && d + 199998 <= SIZE) && 1 == cond) && last <= c + 5) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && st == 1) && b == a) && c + 199992 <= SIZE) && 8 <= c)) || ((((((((((cond == 1 && c <= 9) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && last <= c + 14) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((c <= 11 && cond == 1) && last <= c + 12) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((last <= c + 20 && cond == 1) && c <= 3) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((((3 <= c && cond == 1) && last <= 3) && c <= 3) && d + 199998 <= SIZE) && 1 == cond) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((last <= c + 18 && cond == 1) && d + 199998 <= SIZE) && c <= 5) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && last <= c + 17) && 1 == cond) && c <= 6) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199983 <= SIZE) && 17 <= c) && d == 0) && c < last + 1) && st == 1) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && 2 <= c) && c + 199998 <= SIZE) && st == 1) && b == a)) || (((((((199996 + c <= SIZE && cond == 1) && b == 0) && d == 0) && c < last + 1) && st == 1) && b == a) && 4 <= c)) || (((((((cond == 1 && b == 0) && 15 <= c) && d == 0) && c < last + 1) && c + 199985 <= SIZE) && st == 1) && b == a)) || (((((((((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1)) && last <= c + 11) && 1 == cond) && c < last + 1) && c <= 12) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && last <= c + 1) && c <= 22) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && b == 0) && d == 0) && c <= 19) && c < last + 1) && 19 <= c) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && last <= c + 3) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && c <= 20) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((last <= c + 7 && c <= 16) && (((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1))) && 1 == cond) && c < last + 1) && 200000 <= SIZE) && b == a)) || ((((((((c < SIZE + 1 && cond == 1) && b == 0) && last + 1 <= c) && d == 0) && st == 0) && 0 < last) && 200000 <= SIZE) && b == a) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: ((((((((((c < SIZE + 1 && cond == 1) && SIZE <= c) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && 0 < last) && last <= 23) && 200000 <= SIZE) && b == a) || ((((((cond == 1 && b == 0) && d == 0) && 0 < last) && 200000 <= SIZE) && b == a) && c == 0)) || (((((((c < SIZE + 1 && cond == 1) && SIZE <= c) && 1 == cond) && d == 0) && 0 < last) && 200000 <= SIZE) && b == a) RESULT: Ultimate proved your program to be correct! [2021-10-21 19:21:19,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2155f7-b886-4506-9197-5cb0ac19ef23/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...