./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX --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 a8791b6973aa1a0d5421161a634fa2e6c3276aa5fd05ed6d81de7a2762aa206a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:50:45,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:50:45,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:50:45,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:50:45,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:50:45,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:50:45,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:50:45,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:50:45,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:50:45,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:50:45,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:50:45,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:50:45,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:50:45,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:50:45,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:50:45,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:50:46,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:50:46,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:50:46,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:50:46,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:50:46,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:50:46,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:50:46,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:50:46,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:50:46,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:50:46,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:50:46,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:50:46,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:50:46,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:50:46,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:50:46,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:50:46,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:50:46,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:50:46,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:50:46,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:50:46,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:50:46,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:50:46,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:50:46,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:50:46,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:50:46,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:50:46,058 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:50:46,085 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:50:46,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:50:46,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:50:46,086 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:50:46,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:50:46,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:50:46,088 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:50:46,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:50:46,088 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:50:46,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:50:46,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:50:46,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:50:46,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:50:46,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:50:46,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:50:46,090 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:50:46,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:50:46,090 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:50:46,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:50:46,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:50:46,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:50:46,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:50:46,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:50:46,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:50:46,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:50:46,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:50:46,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:50:46,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:50:46,093 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:50:46,093 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:50:46,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:50:46,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:50:46,093 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_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8791b6973aa1a0d5421161a634fa2e6c3276aa5fd05ed6d81de7a2762aa206a [2021-11-09 09:50:46,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:50:46,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:50:46,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:50:46,409 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:50:46,410 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:50:46,411 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c [2021-11-09 09:50:46,488 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/data/058d492fe/e6f576cc2b474689b59ea7e2e925e883/FLAG83aa4031f [2021-11-09 09:50:47,021 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:50:47,021 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c [2021-11-09 09:50:47,027 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/data/058d492fe/e6f576cc2b474689b59ea7e2e925e883/FLAG83aa4031f [2021-11-09 09:50:47,400 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/data/058d492fe/e6f576cc2b474689b59ea7e2e925e883 [2021-11-09 09:50:47,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:50:47,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:50:47,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:50:47,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:50:47,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:50:47,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:50:47" (1/1) ... [2021-11-09 09:50:47,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d9507b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:47, skipping insertion in model container [2021-11-09 09:50:47,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:50:47" (1/1) ... [2021-11-09 09:50:47,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:50:47,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:50:47,568 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_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c[468,481] [2021-11-09 09:50:47,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:50:47,593 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:50:47,603 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_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c[468,481] [2021-11-09 09:50:47,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:50:47,623 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:50:47,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:47 WrapperNode [2021-11-09 09:50:47,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:50:47,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:50:47,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:50:47,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:50:47,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:47" (1/1) ... [2021-11-09 09:50:47,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:47" (1/1) ... [2021-11-09 09:50:47,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:50:47,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:50:47,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:50:47,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:50:47,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:47" (1/1) ... [2021-11-09 09:50:47,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:47" (1/1) ... [2021-11-09 09:50:47,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:47" (1/1) ... [2021-11-09 09:50:47,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:47" (1/1) ... [2021-11-09 09:50:47,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:47" (1/1) ... [2021-11-09 09:50:47,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:47" (1/1) ... [2021-11-09 09:50:47,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:47" (1/1) ... [2021-11-09 09:50:47,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:50:47,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:50:47,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:50:47,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:50:47,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:47" (1/1) ... [2021-11-09 09:50:47,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:50:47,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:47,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:50:47,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:50:47,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:50:47,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:50:47,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:50:47,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:50:47,953 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:50:47,954 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-09 09:50:47,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:50:47 BoogieIcfgContainer [2021-11-09 09:50:47,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:50:47,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:50:47,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:50:47,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:50:47,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:50:47" (1/3) ... [2021-11-09 09:50:47,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e62779a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:50:47, skipping insertion in model container [2021-11-09 09:50:47,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:47" (2/3) ... [2021-11-09 09:50:47,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e62779a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:50:47, skipping insertion in model container [2021-11-09 09:50:47,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:50:47" (3/3) ... [2021-11-09 09:50:47,965 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_notd2.c [2021-11-09 09:50:47,970 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:50:47,971 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:50:48,042 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:50:48,055 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:50:48,055 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:50:48,078 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) [2021-11-09 09:50:48,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:50:48,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:48,099 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:48,100 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:48,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:48,114 INFO L85 PathProgramCache]: Analyzing trace with hash -493598204, now seen corresponding path program 1 times [2021-11-09 09:50:48,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:48,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42217649] [2021-11-09 09:50:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:48,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:48,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:48,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42217649] [2021-11-09 09:50:48,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42217649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:48,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:48,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:50:48,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175772119] [2021-11-09 09:50:48,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:50:48,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:48,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:50:48,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:50:48,380 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) [2021-11-09 09:50:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:48,397 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2021-11-09 09:50:48,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:50:48,399 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 [2021-11-09 09:50:48,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:48,408 INFO L225 Difference]: With dead ends: 33 [2021-11-09 09:50:48,408 INFO L226 Difference]: Without dead ends: 16 [2021-11-09 09:50:48,411 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:50:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-09 09:50:48,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-09 09:50:48,439 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) [2021-11-09 09:50:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-11-09 09:50:48,442 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 12 [2021-11-09 09:50:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:48,443 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-11-09 09:50:48,443 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) [2021-11-09 09:50:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2021-11-09 09:50:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:50:48,444 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:48,444 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:48,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:50:48,445 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:48,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:48,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2059231113, now seen corresponding path program 1 times [2021-11-09 09:50:48,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:48,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887566418] [2021-11-09 09:50:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:48,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:48,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:48,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887566418] [2021-11-09 09:50:48,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887566418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:48,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:48,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:50:48,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369081173] [2021-11-09 09:50:48,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:50:48,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:48,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:50:48,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:50:48,548 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) [2021-11-09 09:50:48,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:48,607 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2021-11-09 09:50:48,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:50:48,608 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 [2021-11-09 09:50:48,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:48,609 INFO L225 Difference]: With dead ends: 32 [2021-11-09 09:50:48,609 INFO L226 Difference]: Without dead ends: 20 [2021-11-09 09:50:48,610 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:50:48,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-09 09:50:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-11-09 09:50:48,615 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) [2021-11-09 09:50:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-11-09 09:50:48,616 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 12 [2021-11-09 09:50:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:48,617 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-11-09 09:50:48,617 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) [2021-11-09 09:50:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-11-09 09:50:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 09:50:48,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:48,619 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:48,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:50:48,619 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash 573171571, now seen corresponding path program 1 times [2021-11-09 09:50:48,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:48,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197487410] [2021-11-09 09:50:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:48,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:50:48,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:48,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197487410] [2021-11-09 09:50:48,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197487410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:48,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:48,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:50:48,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478982669] [2021-11-09 09:50:48,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:50:48,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:48,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:50:48,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:48,677 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) [2021-11-09 09:50:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:48,752 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2021-11-09 09:50:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:50:48,753 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 [2021-11-09 09:50:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:48,754 INFO L225 Difference]: With dead ends: 38 [2021-11-09 09:50:48,755 INFO L226 Difference]: Without dead ends: 25 [2021-11-09 09:50:48,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:48,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-09 09:50:48,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-11-09 09:50:48,759 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) [2021-11-09 09:50:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-09 09:50:48,760 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 15 [2021-11-09 09:50:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:48,761 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-09 09:50:48,761 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) [2021-11-09 09:50:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-09 09:50:48,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 09:50:48,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:48,763 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:48,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:50:48,763 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:48,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:48,764 INFO L85 PathProgramCache]: Analyzing trace with hash 630429873, now seen corresponding path program 1 times [2021-11-09 09:50:48,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:48,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721487289] [2021-11-09 09:50:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:48,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:50:48,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:48,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721487289] [2021-11-09 09:50:48,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721487289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:48,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:48,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:50:48,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279842728] [2021-11-09 09:50:48,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:50:48,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:48,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:50:48,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:50:48,865 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) [2021-11-09 09:50:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:48,929 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2021-11-09 09:50:48,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:50:48,933 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 [2021-11-09 09:50:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:48,935 INFO L225 Difference]: With dead ends: 46 [2021-11-09 09:50:48,938 INFO L226 Difference]: Without dead ends: 32 [2021-11-09 09:50:48,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:50:48,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-09 09:50:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-11-09 09:50:48,955 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) [2021-11-09 09:50:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 42 transitions. [2021-11-09 09:50:48,958 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 42 transitions. Word has length 15 [2021-11-09 09:50:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:48,959 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 42 transitions. [2021-11-09 09:50:48,959 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) [2021-11-09 09:50:48,961 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 42 transitions. [2021-11-09 09:50:48,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 09:50:48,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:48,963 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:48,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:50:48,964 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:48,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash 630489455, now seen corresponding path program 1 times [2021-11-09 09:50:48,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:48,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892601093] [2021-11-09 09:50:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:48,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:49,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:49,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892601093] [2021-11-09 09:50:49,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892601093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:49,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369114629] [2021-11-09 09:50:49,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:49,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:49,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:49,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:49,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:50:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:49,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:50:49,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:49,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369114629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:49,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:50:49,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-09 09:50:49,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416528687] [2021-11-09 09:50:49,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:50:49,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:49,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:50:49,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:50:49,390 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) [2021-11-09 09:50:49,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:49,462 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2021-11-09 09:50:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:50:49,462 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 [2021-11-09 09:50:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:49,463 INFO L225 Difference]: With dead ends: 67 [2021-11-09 09:50:49,464 INFO L226 Difference]: Without dead ends: 41 [2021-11-09 09:50:49,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:50:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-09 09:50:49,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-11-09 09:50:49,470 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) [2021-11-09 09:50:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2021-11-09 09:50:49,472 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 15 [2021-11-09 09:50:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:49,472 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2021-11-09 09:50:49,472 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) [2021-11-09 09:50:49,473 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2021-11-09 09:50:49,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 09:50:49,473 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:49,474 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:49,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:50:49,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:49,690 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:49,690 INFO L85 PathProgramCache]: Analyzing trace with hash 730990835, now seen corresponding path program 2 times [2021-11-09 09:50:49,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:49,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237580558] [2021-11-09 09:50:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:49,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:49,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:49,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237580558] [2021-11-09 09:50:49,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237580558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:49,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402274001] [2021-11-09 09:50:49,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:50:49,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:49,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:49,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:49,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:50:49,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:50:49,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:50:49,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:50:49,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:50:50,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402274001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:50,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:50:50,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-09 09:50:50,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030557691] [2021-11-09 09:50:50,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:50:50,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:50,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:50:50,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:50:50,116 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) [2021-11-09 09:50:50,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:50,348 INFO L93 Difference]: Finished difference Result 123 states and 179 transitions. [2021-11-09 09:50:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:50:50,349 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 [2021-11-09 09:50:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:50,350 INFO L225 Difference]: With dead ends: 123 [2021-11-09 09:50:50,350 INFO L226 Difference]: Without dead ends: 91 [2021-11-09 09:50:50,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:50:50,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-09 09:50:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-11-09 09:50:50,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 75 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 101 transitions. [2021-11-09 09:50:50,366 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 101 transitions. Word has length 18 [2021-11-09 09:50:50,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:50,366 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 101 transitions. [2021-11-09 09:50:50,366 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) [2021-11-09 09:50:50,366 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 101 transitions. [2021-11-09 09:50:50,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 09:50:50,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:50,368 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:50,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:50:50,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:50,585 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:50,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:50,585 INFO L85 PathProgramCache]: Analyzing trace with hash -104466575, now seen corresponding path program 1 times [2021-11-09 09:50:50,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:50,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379303565] [2021-11-09 09:50:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:50,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:50,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:50,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379303565] [2021-11-09 09:50:50,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379303565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:50,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702343712] [2021-11-09 09:50:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:50,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:50,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:50,713 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:50,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:50:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:50,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:50:50,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:50,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702343712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:50,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:50:50,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 09:50:50,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098766222] [2021-11-09 09:50:50,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:50:50,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:50,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:50:50,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:50:50,975 INFO L87 Difference]: Start difference. First operand 76 states and 101 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) [2021-11-09 09:50:51,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:51,075 INFO L93 Difference]: Finished difference Result 199 states and 267 transitions. [2021-11-09 09:50:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:50:51,076 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 [2021-11-09 09:50:51,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:51,082 INFO L225 Difference]: With dead ends: 199 [2021-11-09 09:50:51,082 INFO L226 Difference]: Without dead ends: 127 [2021-11-09 09:50:51,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:50:51,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-09 09:50:51,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2021-11-09 09:50:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3448275862068966) internal successors, (117), 87 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:51,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 117 transitions. [2021-11-09 09:50:51,111 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 117 transitions. Word has length 21 [2021-11-09 09:50:51,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:51,111 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 117 transitions. [2021-11-09 09:50:51,111 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) [2021-11-09 09:50:51,112 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 117 transitions. [2021-11-09 09:50:51,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:50:51,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:51,113 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:51,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:50:51,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 09:50:51,314 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:51,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:51,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1399176113, now seen corresponding path program 2 times [2021-11-09 09:50:51,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:51,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935731848] [2021-11-09 09:50:51,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:51,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:51,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:51,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935731848] [2021-11-09 09:50:51,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935731848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:51,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600531163] [2021-11-09 09:50:51,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:50:51,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:51,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:51,405 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:51,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:50:51,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:50:51,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:50:51,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:50:51,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:50:51,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600531163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:51,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:50:51,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-09 09:50:51,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372239415] [2021-11-09 09:50:51,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:50:51,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:50:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:50:51,712 INFO L87 Difference]: Start difference. First operand 88 states and 117 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) [2021-11-09 09:50:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:51,986 INFO L93 Difference]: Finished difference Result 291 states and 403 transitions. [2021-11-09 09:50:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:50:51,994 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 [2021-11-09 09:50:51,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:51,996 INFO L225 Difference]: With dead ends: 291 [2021-11-09 09:50:51,996 INFO L226 Difference]: Without dead ends: 207 [2021-11-09 09:50:51,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:50:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-09 09:50:52,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 146. [2021-11-09 09:50:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3379310344827586) internal successors, (194), 145 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:52,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 194 transitions. [2021-11-09 09:50:52,030 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 194 transitions. Word has length 24 [2021-11-09 09:50:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:52,031 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 194 transitions. [2021-11-09 09:50:52,031 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) [2021-11-09 09:50:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 194 transitions. [2021-11-09 09:50:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 09:50:52,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:52,033 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:52,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:50:52,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:52,245 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:52,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2084547665, now seen corresponding path program 3 times [2021-11-09 09:50:52,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:52,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361749701] [2021-11-09 09:50:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:52,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:52,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:52,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361749701] [2021-11-09 09:50:52,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361749701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:52,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045089202] [2021-11-09 09:50:52,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:50:52,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:52,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:52,357 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:52,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:50:52,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:50:52,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:50:52,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:50:52,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-09 09:50:52,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045089202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:52,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:50:52,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2021-11-09 09:50:52,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107799101] [2021-11-09 09:50:52,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:50:52,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:52,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:50:52,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:50:52,540 INFO L87 Difference]: Start difference. First operand 146 states and 194 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) [2021-11-09 09:50:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:52,595 INFO L93 Difference]: Finished difference Result 334 states and 446 transitions. [2021-11-09 09:50:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:50:52,596 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 [2021-11-09 09:50:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:52,597 INFO L225 Difference]: With dead ends: 334 [2021-11-09 09:50:52,598 INFO L226 Difference]: Without dead ends: 192 [2021-11-09 09:50:52,599 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:50:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-09 09:50:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 164. [2021-11-09 09:50:52,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.2392638036809815) internal successors, (202), 163 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 202 transitions. [2021-11-09 09:50:52,615 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 202 transitions. Word has length 27 [2021-11-09 09:50:52,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:52,616 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 202 transitions. [2021-11-09 09:50:52,616 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) [2021-11-09 09:50:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 202 transitions. [2021-11-09 09:50:52,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 09:50:52,617 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:52,617 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:52,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:50:52,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:52,835 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:52,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:52,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1868779761, now seen corresponding path program 1 times [2021-11-09 09:50:52,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:52,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681754132] [2021-11-09 09:50:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:52,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-09 09:50:52,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:52,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681754132] [2021-11-09 09:50:52,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681754132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:52,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:52,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:50:52,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555952444] [2021-11-09 09:50:52,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:50:52,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:52,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:50:52,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:52,902 INFO L87 Difference]: Start difference. First operand 164 states and 202 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) [2021-11-09 09:50:52,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:52,934 INFO L93 Difference]: Finished difference Result 336 states and 416 transitions. [2021-11-09 09:50:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:50:52,935 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 [2021-11-09 09:50:52,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:52,937 INFO L225 Difference]: With dead ends: 336 [2021-11-09 09:50:52,937 INFO L226 Difference]: Without dead ends: 176 [2021-11-09 09:50:52,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-09 09:50:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 162. [2021-11-09 09:50:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.2173913043478262) internal successors, (196), 161 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) [2021-11-09 09:50:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 196 transitions. [2021-11-09 09:50:52,955 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 196 transitions. Word has length 27 [2021-11-09 09:50:52,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:52,957 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 196 transitions. [2021-11-09 09:50:52,958 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) [2021-11-09 09:50:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 196 transitions. [2021-11-09 09:50:52,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 09:50:52,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:52,969 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:52,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:50:52,970 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:52,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:52,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1325275563, now seen corresponding path program 1 times [2021-11-09 09:50:52,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:52,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920863394] [2021-11-09 09:50:52,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:52,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:53,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:53,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920863394] [2021-11-09 09:50:53,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920863394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:53,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354156789] [2021-11-09 09:50:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:53,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:53,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:53,053 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:53,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:50:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:53,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:50:53,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:53,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354156789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:53,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:50:53,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-09 09:50:53,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388539465] [2021-11-09 09:50:53,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:50:53,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:53,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:50:53,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:50:53,358 INFO L87 Difference]: Start difference. First operand 162 states and 196 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) [2021-11-09 09:50:53,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:53,448 INFO L93 Difference]: Finished difference Result 449 states and 539 transitions. [2021-11-09 09:50:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:50:53,449 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 [2021-11-09 09:50:53,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:53,451 INFO L225 Difference]: With dead ends: 449 [2021-11-09 09:50:53,451 INFO L226 Difference]: Without dead ends: 291 [2021-11-09 09:50:53,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:50:53,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-09 09:50:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 192. [2021-11-09 09:50:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.2041884816753927) internal successors, (230), 191 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:53,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 230 transitions. [2021-11-09 09:50:53,468 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 230 transitions. Word has length 28 [2021-11-09 09:50:53,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:53,469 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 230 transitions. [2021-11-09 09:50:53,469 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) [2021-11-09 09:50:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 230 transitions. [2021-11-09 09:50:53,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:50:53,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:53,472 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:53,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:50:53,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:53,693 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash 399501479, now seen corresponding path program 2 times [2021-11-09 09:50:53,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:53,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053207789] [2021-11-09 09:50:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:53,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:53,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:53,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053207789] [2021-11-09 09:50:53,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053207789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:53,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712915440] [2021-11-09 09:50:53,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:50:53,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:53,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:53,802 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:53,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:50:53,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:50:53,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:50:53,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:50:53,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:54,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712915440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:54,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:50:54,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-09 09:50:54,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048786095] [2021-11-09 09:50:54,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:50:54,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:54,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:50:54,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:50:54,161 INFO L87 Difference]: Start difference. First operand 192 states and 230 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) [2021-11-09 09:50:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:54,283 INFO L93 Difference]: Finished difference Result 509 states and 607 transitions. [2021-11-09 09:50:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:50:54,284 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 [2021-11-09 09:50:54,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:54,286 INFO L225 Difference]: With dead ends: 509 [2021-11-09 09:50:54,286 INFO L226 Difference]: Without dead ends: 321 [2021-11-09 09:50:54,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:50:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-09 09:50:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 222. [2021-11-09 09:50:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.1945701357466063) internal successors, (264), 221 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2021-11-09 09:50:54,305 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 31 [2021-11-09 09:50:54,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:54,305 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2021-11-09 09:50:54,305 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) [2021-11-09 09:50:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2021-11-09 09:50:54,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 09:50:54,306 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:54,306 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:54,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:50:54,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:50:54,533 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:54,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:54,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1351227349, now seen corresponding path program 3 times [2021-11-09 09:50:54,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:54,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64674599] [2021-11-09 09:50:54,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:54,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:54,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:54,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64674599] [2021-11-09 09:50:54,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64674599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:54,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437466335] [2021-11-09 09:50:54,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:50:54,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:54,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:54,659 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:54,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:50:54,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:50:54,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:50:54,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:50:54,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 09:50:54,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437466335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:54,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:50:54,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2021-11-09 09:50:54,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596002492] [2021-11-09 09:50:54,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:50:54,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:50:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:50:54,901 INFO L87 Difference]: Start difference. First operand 222 states and 264 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) [2021-11-09 09:50:54,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:54,968 INFO L93 Difference]: Finished difference Result 225 states and 266 transitions. [2021-11-09 09:50:54,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:50:54,969 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 [2021-11-09 09:50:54,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:54,970 INFO L225 Difference]: With dead ends: 225 [2021-11-09 09:50:54,970 INFO L226 Difference]: Without dead ends: 165 [2021-11-09 09:50:54,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:50:54,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-09 09:50:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-11-09 09:50:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.2085889570552146) internal successors, (197), 163 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 197 transitions. [2021-11-09 09:50:55,002 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 197 transitions. Word has length 34 [2021-11-09 09:50:55,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:55,002 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 197 transitions. [2021-11-09 09:50:55,002 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) [2021-11-09 09:50:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 197 transitions. [2021-11-09 09:50:55,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 09:50:55,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:55,003 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:55,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:50:55,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:55,220 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:55,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1860700439, now seen corresponding path program 1 times [2021-11-09 09:50:55,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:55,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139325583] [2021-11-09 09:50:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:55,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:55,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:55,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139325583] [2021-11-09 09:50:55,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139325583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:55,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723314800] [2021-11-09 09:50:55,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:55,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:55,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:55,329 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:55,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:50:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:55,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:50:55,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:55,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723314800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:55,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:50:55,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-09 09:50:55,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916763728] [2021-11-09 09:50:55,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:50:55,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:55,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:50:55,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:50:55,734 INFO L87 Difference]: Start difference. First operand 164 states and 197 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) [2021-11-09 09:50:55,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:55,860 INFO L93 Difference]: Finished difference Result 443 states and 529 transitions. [2021-11-09 09:50:55,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:50:55,861 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 [2021-11-09 09:50:55,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:55,863 INFO L225 Difference]: With dead ends: 443 [2021-11-09 09:50:55,863 INFO L226 Difference]: Without dead ends: 283 [2021-11-09 09:50:55,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:50:55,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-09 09:50:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 188. [2021-11-09 09:50:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.2032085561497325) internal successors, (225), 187 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 225 transitions. [2021-11-09 09:50:55,879 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 225 transitions. Word has length 34 [2021-11-09 09:50:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:55,880 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 225 transitions. [2021-11-09 09:50:55,880 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) [2021-11-09 09:50:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 225 transitions. [2021-11-09 09:50:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 09:50:55,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:55,881 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:55,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:50:56,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:50:56,096 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:56,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:56,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1470700201, now seen corresponding path program 2 times [2021-11-09 09:50:56,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:56,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217673667] [2021-11-09 09:50:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:56,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:56,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:56,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217673667] [2021-11-09 09:50:56,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217673667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:56,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177140996] [2021-11-09 09:50:56,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:50:56,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:56,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:56,232 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:56,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:50:56,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:50:56,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:50:56,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:50:56,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:56,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177140996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:56,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:50:56,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-09 09:50:56,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891623907] [2021-11-09 09:50:56,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:50:56,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:56,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:50:56,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:50:56,745 INFO L87 Difference]: Start difference. First operand 188 states and 225 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) [2021-11-09 09:50:56,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:56,884 INFO L93 Difference]: Finished difference Result 491 states and 585 transitions. [2021-11-09 09:50:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:50:56,884 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 [2021-11-09 09:50:56,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:56,887 INFO L225 Difference]: With dead ends: 491 [2021-11-09 09:50:56,887 INFO L226 Difference]: Without dead ends: 307 [2021-11-09 09:50:56,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:50:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-09 09:50:56,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 212. [2021-11-09 09:50:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.1990521327014219) internal successors, (253), 211 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:56,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 253 transitions. [2021-11-09 09:50:56,904 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 253 transitions. Word has length 37 [2021-11-09 09:50:56,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:56,905 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 253 transitions. [2021-11-09 09:50:56,905 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) [2021-11-09 09:50:56,905 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 253 transitions. [2021-11-09 09:50:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 09:50:56,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:56,906 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:56,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:50:57,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 09:50:57,121 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:57,121 INFO L85 PathProgramCache]: Analyzing trace with hash -877109527, now seen corresponding path program 3 times [2021-11-09 09:50:57,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:57,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163133006] [2021-11-09 09:50:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:57,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:57,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:57,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163133006] [2021-11-09 09:50:57,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163133006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:57,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27795578] [2021-11-09 09:50:57,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:50:57,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:57,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:57,253 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:57,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:50:57,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:50:57,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:50:57,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:50:57,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-09 09:50:57,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27795578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:57,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:50:57,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2021-11-09 09:50:57,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865475972] [2021-11-09 09:50:57,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:50:57,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:57,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:50:57,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:50:57,821 INFO L87 Difference]: Start difference. First operand 212 states and 253 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) [2021-11-09 09:50:57,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:57,943 INFO L93 Difference]: Finished difference Result 486 states and 576 transitions. [2021-11-09 09:50:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:50:57,944 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 [2021-11-09 09:50:57,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:57,947 INFO L225 Difference]: With dead ends: 486 [2021-11-09 09:50:57,947 INFO L226 Difference]: Without dead ends: 484 [2021-11-09 09:50:57,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:50:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-09 09:50:57,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 300. [2021-11-09 09:50:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.1872909698996656) internal successors, (355), 299 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 355 transitions. [2021-11-09 09:50:57,978 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 355 transitions. Word has length 40 [2021-11-09 09:50:57,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:57,979 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 355 transitions. [2021-11-09 09:50:57,979 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) [2021-11-09 09:50:57,979 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 355 transitions. [2021-11-09 09:50:57,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 09:50:57,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:57,980 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:58,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:50:58,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:50:58,197 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:58,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:58,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1952423639, now seen corresponding path program 1 times [2021-11-09 09:50:58,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:58,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35101046] [2021-11-09 09:50:58,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:58,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-09 09:50:58,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:58,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35101046] [2021-11-09 09:50:58,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35101046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:58,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:58,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:50:58,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389161711] [2021-11-09 09:50:58,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:50:58,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:58,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:50:58,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:58,234 INFO L87 Difference]: Start difference. First operand 300 states and 355 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:58,268 INFO L93 Difference]: Finished difference Result 427 states and 509 transitions. [2021-11-09 09:50:58,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:50:58,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 09:50:58,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:58,270 INFO L225 Difference]: With dead ends: 427 [2021-11-09 09:50:58,271 INFO L226 Difference]: Without dead ends: 319 [2021-11-09 09:50:58,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:58,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-09 09:50:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 306. [2021-11-09 09:50:58,296 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) [2021-11-09 09:50:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 361 transitions. [2021-11-09 09:50:58,298 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 361 transitions. Word has length 40 [2021-11-09 09:50:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:58,298 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 361 transitions. [2021-11-09 09:50:58,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 361 transitions. [2021-11-09 09:50:58,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 09:50:58,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:58,299 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:58,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 09:50:58,300 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:58,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:58,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1950517015, now seen corresponding path program 1 times [2021-11-09 09:50:58,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:58,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221576920] [2021-11-09 09:50:58,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:58,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:58,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:58,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221576920] [2021-11-09 09:50:58,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221576920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:58,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108114632] [2021-11-09 09:50:58,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:58,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:58,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:58,414 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:58,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:50:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:58,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:50:58,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:58,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108114632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:58,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:50:58,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-09 09:50:58,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012848963] [2021-11-09 09:50:58,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:50:58,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:58,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:50:58,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:50:58,958 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) [2021-11-09 09:50:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:59,130 INFO L93 Difference]: Finished difference Result 669 states and 793 transitions. [2021-11-09 09:50:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:50:59,131 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 [2021-11-09 09:50:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:59,133 INFO L225 Difference]: With dead ends: 669 [2021-11-09 09:50:59,134 INFO L226 Difference]: Without dead ends: 439 [2021-11-09 09:50:59,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:50:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-09 09:50:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 339. [2021-11-09 09:50:59,166 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) [2021-11-09 09:50:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 399 transitions. [2021-11-09 09:50:59,168 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 399 transitions. Word has length 40 [2021-11-09 09:50:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:59,168 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 399 transitions. [2021-11-09 09:50:59,169 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) [2021-11-09 09:50:59,169 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 399 transitions. [2021-11-09 09:50:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:50:59,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:59,169 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:59,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:50:59,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:50:59,393 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:59,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:59,393 INFO L85 PathProgramCache]: Analyzing trace with hash -658324379, now seen corresponding path program 2 times [2021-11-09 09:50:59,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:59,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090238060] [2021-11-09 09:50:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:59,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:59,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:59,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090238060] [2021-11-09 09:50:59,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090238060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:59,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985633487] [2021-11-09 09:50:59,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:50:59,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:59,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:59,534 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:59,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:50:59,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:50:59,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:50:59,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:50:59,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-09 09:51:00,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985633487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:00,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:00,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-11-09 09:51:00,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909490556] [2021-11-09 09:51:00,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:51:00,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:00,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:51:00,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:51:00,073 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) [2021-11-09 09:51:00,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:00,532 INFO L93 Difference]: Finished difference Result 1075 states and 1251 transitions. [2021-11-09 09:51:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:51:00,532 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 [2021-11-09 09:51:00,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:00,537 INFO L225 Difference]: With dead ends: 1075 [2021-11-09 09:51:00,537 INFO L226 Difference]: Without dead ends: 821 [2021-11-09 09:51:00,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=996, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:51:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-11-09 09:51:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 333. [2021-11-09 09:51:00,571 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) [2021-11-09 09:51:00,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-11-09 09:51:00,573 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 43 [2021-11-09 09:51:00,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:00,573 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-11-09 09:51:00,574 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) [2021-11-09 09:51:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-11-09 09:51:00,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 09:51:00,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:00,575 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:00,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:00,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:00,800 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1311604647, now seen corresponding path program 3 times [2021-11-09 09:51:00,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:00,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474876433] [2021-11-09 09:51:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:00,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:00,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:00,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474876433] [2021-11-09 09:51:00,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474876433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:00,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728812942] [2021-11-09 09:51:00,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:51:00,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:00,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:00,969 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:00,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:51:01,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:51:01,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:01,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:51:01,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 09:51:01,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728812942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:01,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:51:01,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 21 [2021-11-09 09:51:01,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231913811] [2021-11-09 09:51:01,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:51:01,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:01,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:51:01,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:51:01,657 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) [2021-11-09 09:51:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:01,823 INFO L93 Difference]: Finished difference Result 442 states and 513 transitions. [2021-11-09 09:51:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:51:01,823 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 [2021-11-09 09:51:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:01,826 INFO L225 Difference]: With dead ends: 442 [2021-11-09 09:51:01,826 INFO L226 Difference]: Without dead ends: 440 [2021-11-09 09:51:01,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:51:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-09 09:51:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 333. [2021-11-09 09:51:01,857 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) [2021-11-09 09:51:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-11-09 09:51:01,859 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 46 [2021-11-09 09:51:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:01,859 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-11-09 09:51:01,859 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) [2021-11-09 09:51:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-11-09 09:51:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 09:51:01,860 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:01,861 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:01,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:02,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:02,077 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:02,077 INFO L85 PathProgramCache]: Analyzing trace with hash -53609623, now seen corresponding path program 1 times [2021-11-09 09:51:02,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:02,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141834797] [2021-11-09 09:51:02,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:02,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-09 09:51:02,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:02,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141834797] [2021-11-09 09:51:02,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141834797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:02,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:02,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:51:02,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239492594] [2021-11-09 09:51:02,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:51:02,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:02,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:51:02,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:51:02,128 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) [2021-11-09 09:51:02,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:02,190 INFO L93 Difference]: Finished difference Result 561 states and 655 transitions. [2021-11-09 09:51:02,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:51:02,191 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 [2021-11-09 09:51:02,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:02,193 INFO L225 Difference]: With dead ends: 561 [2021-11-09 09:51:02,193 INFO L226 Difference]: Without dead ends: 448 [2021-11-09 09:51:02,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:51:02,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-09 09:51:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 400. [2021-11-09 09:51:02,229 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) [2021-11-09 09:51:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 469 transitions. [2021-11-09 09:51:02,231 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 469 transitions. Word has length 46 [2021-11-09 09:51:02,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:02,232 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 469 transitions. [2021-11-09 09:51:02,232 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) [2021-11-09 09:51:02,232 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 469 transitions. [2021-11-09 09:51:02,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 09:51:02,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:02,233 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:02,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 09:51:02,234 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:02,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:02,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1284068705, now seen corresponding path program 1 times [2021-11-09 09:51:02,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:02,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194090757] [2021-11-09 09:51:02,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:02,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-09 09:51:02,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:02,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194090757] [2021-11-09 09:51:02,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194090757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:02,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255863593] [2021-11-09 09:51:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:02,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:02,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:02,397 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:02,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:51:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:02,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:51:02,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-09 09:51:03,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255863593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:03,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:03,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-11-09 09:51:03,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236661787] [2021-11-09 09:51:03,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:51:03,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:03,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:51:03,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:51:03,164 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) [2021-11-09 09:51:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:03,416 INFO L93 Difference]: Finished difference Result 1102 states and 1266 transitions. [2021-11-09 09:51:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:51:03,417 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 [2021-11-09 09:51:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:03,422 INFO L225 Difference]: With dead ends: 1102 [2021-11-09 09:51:03,422 INFO L226 Difference]: Without dead ends: 793 [2021-11-09 09:51:03,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:51:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-11-09 09:51:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 439. [2021-11-09 09:51:03,467 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) [2021-11-09 09:51:03,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 514 transitions. [2021-11-09 09:51:03,469 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 514 transitions. Word has length 87 [2021-11-09 09:51:03,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:03,469 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 514 transitions. [2021-11-09 09:51:03,470 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) [2021-11-09 09:51:03,470 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 514 transitions. [2021-11-09 09:51:03,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-09 09:51:03,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:03,472 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:03,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:03,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:03,691 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:03,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:03,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1856213775, now seen corresponding path program 2 times [2021-11-09 09:51:03,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:03,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504798630] [2021-11-09 09:51:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:03,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-09 09:51:03,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:03,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504798630] [2021-11-09 09:51:03,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504798630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:03,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464624173] [2021-11-09 09:51:03,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:51:03,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:03,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:03,877 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:03,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:51:04,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:51:04,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:04,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:51:04,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-09 09:51:04,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464624173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:04,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:04,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-11-09 09:51:04,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923614822] [2021-11-09 09:51:04,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 09:51:04,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:04,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 09:51:04,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:51:04,659 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) [2021-11-09 09:51:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:04,953 INFO L93 Difference]: Finished difference Result 1171 states and 1346 transitions. [2021-11-09 09:51:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:51:04,954 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 [2021-11-09 09:51:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:04,958 INFO L225 Difference]: With dead ends: 1171 [2021-11-09 09:51:04,959 INFO L226 Difference]: Without dead ends: 832 [2021-11-09 09:51:04,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:51:04,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-11-09 09:51:05,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 478. [2021-11-09 09:51:05,013 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) [2021-11-09 09:51:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 559 transitions. [2021-11-09 09:51:05,016 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 559 transitions. Word has length 93 [2021-11-09 09:51:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:05,016 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 559 transitions. [2021-11-09 09:51:05,017 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) [2021-11-09 09:51:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 559 transitions. [2021-11-09 09:51:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-09 09:51:05,018 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:05,018 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:05,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:05,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 09:51:05,233 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:05,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:05,233 INFO L85 PathProgramCache]: Analyzing trace with hash -267019423, now seen corresponding path program 3 times [2021-11-09 09:51:05,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:05,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102740437] [2021-11-09 09:51:05,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:05,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 535 proven. 247 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-09 09:51:05,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:05,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102740437] [2021-11-09 09:51:05,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102740437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:05,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230311777] [2021-11-09 09:51:05,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:51:05,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:05,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:05,425 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:05,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:51:05,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:51:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:05,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:51:05,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 37 proven. 541 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-11-09 09:51:06,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230311777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:06,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:06,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 24 [2021-11-09 09:51:06,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449882932] [2021-11-09 09:51:06,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 09:51:06,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:06,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 09:51:06,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:51:06,507 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) [2021-11-09 09:51:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:08,383 INFO L93 Difference]: Finished difference Result 2208 states and 2540 transitions. [2021-11-09 09:51:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-09 09:51:08,383 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 [2021-11-09 09:51:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:08,407 INFO L225 Difference]: With dead ends: 2208 [2021-11-09 09:51:08,407 INFO L226 Difference]: Without dead ends: 1839 [2021-11-09 09:51:08,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1574, Invalid=5908, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 09:51:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-11-09 09:51:08,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 770. [2021-11-09 09:51:08,526 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) [2021-11-09 09:51:08,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 901 transitions. [2021-11-09 09:51:08,528 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 901 transitions. Word has length 99 [2021-11-09 09:51:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:08,529 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 901 transitions. [2021-11-09 09:51:08,529 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) [2021-11-09 09:51:08,529 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 901 transitions. [2021-11-09 09:51:08,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-09 09:51:08,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:08,531 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 24, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:08,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:08,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 09:51:08,752 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:08,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:08,753 INFO L85 PathProgramCache]: Analyzing trace with hash -111346257, now seen corresponding path program 1 times [2021-11-09 09:51:08,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:08,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751614034] [2021-11-09 09:51:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:08,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 49 proven. 861 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-09 09:51:08,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:08,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751614034] [2021-11-09 09:51:08,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751614034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:08,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109983648] [2021-11-09 09:51:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:08,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:08,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:08,958 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:08,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:51:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:09,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:51:09,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 618 proven. 287 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-11-09 09:51:09,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109983648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:09,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:09,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-11-09 09:51:09,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415458167] [2021-11-09 09:51:09,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 09:51:09,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:09,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 09:51:09,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:51:09,934 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) [2021-11-09 09:51:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:10,266 INFO L93 Difference]: Finished difference Result 1968 states and 2264 transitions. [2021-11-09 09:51:10,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:51:10,268 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 [2021-11-09 09:51:10,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:10,275 INFO L225 Difference]: With dead ends: 1968 [2021-11-09 09:51:10,275 INFO L226 Difference]: Without dead ends: 1316 [2021-11-09 09:51:10,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:51:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-11-09 09:51:10,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 809. [2021-11-09 09:51:10,376 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) [2021-11-09 09:51:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 946 transitions. [2021-11-09 09:51:10,379 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 946 transitions. Word has length 105 [2021-11-09 09:51:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:10,379 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 946 transitions. [2021-11-09 09:51:10,380 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) [2021-11-09 09:51:10,380 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 946 transitions. [2021-11-09 09:51:10,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-09 09:51:10,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:10,382 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 26, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:10,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:10,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 09:51:10,609 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:10,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:10,609 INFO L85 PathProgramCache]: Analyzing trace with hash 802849635, now seen corresponding path program 2 times [2021-11-09 09:51:10,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:10,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623573656] [2021-11-09 09:51:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:10,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 52 proven. 990 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-09 09:51:10,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:10,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623573656] [2021-11-09 09:51:10,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623573656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:10,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253137836] [2021-11-09 09:51:10,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:51:10,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:10,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:10,841 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:10,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:51:11,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:51:11,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:11,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:51:11,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-11-09 09:51:11,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253137836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:11,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:11,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-09 09:51:11,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233029973] [2021-11-09 09:51:11,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 09:51:11,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:11,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 09:51:11,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 09:51:11,961 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) [2021-11-09 09:51:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:12,382 INFO L93 Difference]: Finished difference Result 2078 states and 2393 transitions. [2021-11-09 09:51:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:51:12,388 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 [2021-11-09 09:51:12,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:12,394 INFO L225 Difference]: With dead ends: 2078 [2021-11-09 09:51:12,394 INFO L226 Difference]: Without dead ends: 1396 [2021-11-09 09:51:12,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 09:51:12,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-11-09 09:51:12,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 866. [2021-11-09 09:51:12,513 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) [2021-11-09 09:51:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1012 transitions. [2021-11-09 09:51:12,516 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1012 transitions. Word has length 111 [2021-11-09 09:51:12,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:12,516 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1012 transitions. [2021-11-09 09:51:12,517 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) [2021-11-09 09:51:12,517 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1012 transitions. [2021-11-09 09:51:12,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-09 09:51:12,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:12,519 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 28, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:12,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:12,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 09:51:12,733 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:12,733 INFO L85 PathProgramCache]: Analyzing trace with hash -780287697, now seen corresponding path program 3 times [2021-11-09 09:51:12,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:12,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724572351] [2021-11-09 09:51:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:12,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 55 proven. 1128 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-11-09 09:51:12,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:12,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724572351] [2021-11-09 09:51:12,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724572351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:12,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670512893] [2021-11-09 09:51:12,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:51:12,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:12,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:12,981 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:13,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:51:13,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:51:13,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:13,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:51:13,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 807 proven. 47 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2021-11-09 09:51:14,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670512893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:14,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:14,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 25 [2021-11-09 09:51:14,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626411145] [2021-11-09 09:51:14,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:51:14,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:14,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:51:14,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:51:14,035 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) [2021-11-09 09:51:15,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:15,625 INFO L93 Difference]: Finished difference Result 1933 states and 2278 transitions. [2021-11-09 09:51:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-09 09:51:15,632 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 [2021-11-09 09:51:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:15,636 INFO L225 Difference]: With dead ends: 1933 [2021-11-09 09:51:15,637 INFO L226 Difference]: Without dead ends: 1203 [2021-11-09 09:51:15,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1816, Invalid=4990, Unknown=0, NotChecked=0, Total=6806 [2021-11-09 09:51:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-11-09 09:51:15,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 794. [2021-11-09 09:51:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 1.1235813366960907) internal successors, (891), 793 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 891 transitions. [2021-11-09 09:51:15,748 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 891 transitions. Word has length 117 [2021-11-09 09:51:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:15,749 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 891 transitions. [2021-11-09 09:51:15,749 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) [2021-11-09 09:51:15,749 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 891 transitions. [2021-11-09 09:51:15,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-09 09:51:15,758 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:15,758 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 20, 14, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:15,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:15,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:51:15,981 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:15,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash 838744801, now seen corresponding path program 1 times [2021-11-09 09:51:15,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:15,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081345825] [2021-11-09 09:51:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:15,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 984 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-11-09 09:51:16,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:16,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081345825] [2021-11-09 09:51:16,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081345825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:16,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:16,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:51:16,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599904593] [2021-11-09 09:51:16,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:51:16,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:16,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:51:16,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:51:16,036 INFO L87 Difference]: Start difference. First operand 794 states and 891 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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) [2021-11-09 09:51:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:16,205 INFO L93 Difference]: Finished difference Result 1253 states and 1372 transitions. [2021-11-09 09:51:16,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:51:16,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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) Word has length 123 [2021-11-09 09:51:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:16,211 INFO L225 Difference]: With dead ends: 1253 [2021-11-09 09:51:16,212 INFO L226 Difference]: Without dead ends: 1051 [2021-11-09 09:51:16,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:51:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-11-09 09:51:16,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 803. [2021-11-09 09:51:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.125935162094763) internal successors, (903), 802 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 903 transitions. [2021-11-09 09:51:16,362 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 903 transitions. Word has length 123 [2021-11-09 09:51:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:16,363 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 903 transitions. [2021-11-09 09:51:16,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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) [2021-11-09 09:51:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 903 transitions. [2021-11-09 09:51:16,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-09 09:51:16,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:16,365 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 19, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:16,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-09 09:51:16,365 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:16,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1273355935, now seen corresponding path program 4 times [2021-11-09 09:51:16,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:16,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8407074] [2021-11-09 09:51:16,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:16,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 903 proven. 425 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-11-09 09:51:16,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:16,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8407074] [2021-11-09 09:51:16,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8407074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:16,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649319772] [2021-11-09 09:51:16,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:51:16,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:16,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:16,631 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:16,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:51:17,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:51:17,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:17,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:51:17,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 1033 proven. 206 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2021-11-09 09:51:17,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649319772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:17,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:17,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 30 [2021-11-09 09:51:17,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247001927] [2021-11-09 09:51:17,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 09:51:17,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:17,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 09:51:17,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:51:17,569 INFO L87 Difference]: Start difference. First operand 803 states and 903 transitions. Second operand has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:18,777 INFO L93 Difference]: Finished difference Result 1871 states and 2087 transitions. [2021-11-09 09:51:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-09 09:51:18,778 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 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 [2021-11-09 09:51:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:18,784 INFO L225 Difference]: With dead ends: 1871 [2021-11-09 09:51:18,784 INFO L226 Difference]: Without dead ends: 1215 [2021-11-09 09:51:18,788 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1937, Invalid=5035, Unknown=0, NotChecked=0, Total=6972 [2021-11-09 09:51:18,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-11-09 09:51:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 793. [2021-11-09 09:51:18,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 1.1161616161616161) internal successors, (884), 792 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 884 transitions. [2021-11-09 09:51:18,905 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 884 transitions. Word has length 123 [2021-11-09 09:51:18,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:18,905 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 884 transitions. [2021-11-09 09:51:18,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:18,906 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 884 transitions. [2021-11-09 09:51:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-09 09:51:18,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:18,907 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 21, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:18,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:19,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 09:51:19,133 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:19,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1151168365, now seen corresponding path program 5 times [2021-11-09 09:51:19,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:19,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492053272] [2021-11-09 09:51:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:19,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 1010 proven. 477 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-11-09 09:51:19,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:19,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492053272] [2021-11-09 09:51:19,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492053272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:19,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297276791] [2021-11-09 09:51:19,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:51:19,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:19,397 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:19,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:51:19,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-11-09 09:51:19,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:19,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:51:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 1257 proven. 451 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-11-09 09:51:20,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297276791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:20,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:20,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 45 [2021-11-09 09:51:20,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646569144] [2021-11-09 09:51:20,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 09:51:20,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:20,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 09:51:20,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=1553, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 09:51:20,799 INFO L87 Difference]: Start difference. First operand 793 states and 884 transitions. Second operand has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:22,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:22,193 INFO L93 Difference]: Finished difference Result 1897 states and 2110 transitions. [2021-11-09 09:51:22,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-09 09:51:22,193 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 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 [2021-11-09 09:51:22,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:22,198 INFO L225 Difference]: With dead ends: 1897 [2021-11-09 09:51:22,198 INFO L226 Difference]: Without dead ends: 1251 [2021-11-09 09:51:22,201 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2325, Invalid=7977, Unknown=0, NotChecked=0, Total=10302 [2021-11-09 09:51:22,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-11-09 09:51:22,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1003. [2021-11-09 09:51:22,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.1047904191616766) internal successors, (1107), 1002 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1107 transitions. [2021-11-09 09:51:22,306 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1107 transitions. Word has length 129 [2021-11-09 09:51:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:22,307 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1107 transitions. [2021-11-09 09:51:22,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1107 transitions. [2021-11-09 09:51:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-09 09:51:22,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:22,309 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 23, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:22,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-09 09:51:22,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:22,525 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:22,525 INFO L85 PathProgramCache]: Analyzing trace with hash 244793185, now seen corresponding path program 6 times [2021-11-09 09:51:22,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:22,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188586383] [2021-11-09 09:51:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:22,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 1123 proven. 532 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2021-11-09 09:51:22,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:22,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188586383] [2021-11-09 09:51:22,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188586383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:22,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636308430] [2021-11-09 09:51:22,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:51:22,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:22,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:22,821 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:22,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:51:23,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 09:51:23,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:23,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:51:23,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 247 proven. 1141 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-11-09 09:51:24,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636308430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:24,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:24,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 30 [2021-11-09 09:51:24,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264672844] [2021-11-09 09:51:24,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 09:51:24,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:24,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 09:51:24,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:51:24,606 INFO L87 Difference]: Start difference. First operand 1003 states and 1107 transitions. Second operand has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:27,416 INFO L93 Difference]: Finished difference Result 2162 states and 2408 transitions. [2021-11-09 09:51:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-09 09:51:27,417 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 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 135 [2021-11-09 09:51:27,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:27,422 INFO L225 Difference]: With dead ends: 2162 [2021-11-09 09:51:27,422 INFO L226 Difference]: Without dead ends: 1354 [2021-11-09 09:51:27,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5858 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3764, Invalid=14326, Unknown=0, NotChecked=0, Total=18090 [2021-11-09 09:51:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-11-09 09:51:27,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1117. [2021-11-09 09:51:27,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 1.1155913978494623) internal successors, (1245), 1116 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:27,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1245 transitions. [2021-11-09 09:51:27,572 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1245 transitions. Word has length 135 [2021-11-09 09:51:27,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:27,573 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 1245 transitions. [2021-11-09 09:51:27,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1245 transitions. [2021-11-09 09:51:27,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-09 09:51:27,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:27,575 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 38, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:27,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:27,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:27,796 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:27,797 INFO L85 PathProgramCache]: Analyzing trace with hash 525616749, now seen corresponding path program 1 times [2021-11-09 09:51:27,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:27,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713272918] [2021-11-09 09:51:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:27,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 0 proven. 1858 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2021-11-09 09:51:28,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:28,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713272918] [2021-11-09 09:51:28,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713272918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:28,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136330859] [2021-11-09 09:51:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:28,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:28,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:28,430 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:28,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:51:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:29,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 09:51:29,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 0 proven. 1838 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-09 09:51:31,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136330859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:31,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:31,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 54 [2021-11-09 09:51:31,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793985816] [2021-11-09 09:51:31,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 09:51:31,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:31,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 09:51:31,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2359, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 09:51:31,179 INFO L87 Difference]: Start difference. First operand 1117 states and 1245 transitions. Second operand has 55 states, 55 states have (on average 3.018181818181818) internal successors, (166), 54 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:34,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:34,316 INFO L93 Difference]: Finished difference Result 1938 states and 2125 transitions. [2021-11-09 09:51:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-09 09:51:34,317 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.018181818181818) internal successors, (166), 54 states have internal predecessors, (166), 0 states have call successors, (0), 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 141 [2021-11-09 09:51:34,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:34,323 INFO L225 Difference]: With dead ends: 1938 [2021-11-09 09:51:34,323 INFO L226 Difference]: Without dead ends: 1790 [2021-11-09 09:51:34,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5804 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2911, Invalid=16271, Unknown=0, NotChecked=0, Total=19182 [2021-11-09 09:51:34,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-11-09 09:51:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1421. [2021-11-09 09:51:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 1.1119718309859155) internal successors, (1579), 1420 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:34,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 1579 transitions. [2021-11-09 09:51:34,452 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 1579 transitions. Word has length 141 [2021-11-09 09:51:34,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:34,453 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 1579 transitions. [2021-11-09 09:51:34,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.018181818181818) internal successors, (166), 54 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:34,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 1579 transitions. [2021-11-09 09:51:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-09 09:51:34,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:34,456 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 39, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:34,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:34,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:34,670 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:34,670 INFO L85 PathProgramCache]: Analyzing trace with hash 714830123, now seen corresponding path program 2 times [2021-11-09 09:51:34,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:34,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561865494] [2021-11-09 09:51:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:34,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 587 proven. 1841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:35,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:35,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561865494] [2021-11-09 09:51:35,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561865494] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:35,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619763314] [2021-11-09 09:51:35,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:51:35,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:35,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:35,294 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:35,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:51:36,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:51:36,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:36,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 09:51:36,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 86 proven. 1752 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-09 09:51:37,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619763314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:37,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:37,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 23] total 64 [2021-11-09 09:51:37,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759345790] [2021-11-09 09:51:37,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-09 09:51:37,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:37,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-09 09:51:37,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=3105, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:51:37,099 INFO L87 Difference]: Start difference. First operand 1421 states and 1579 transitions. Second operand has 64 states, 64 states have (on average 3.328125) internal successors, (213), 64 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:39,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:39,060 INFO L93 Difference]: Finished difference Result 2544 states and 2842 transitions. [2021-11-09 09:51:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-09 09:51:39,060 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.328125) internal successors, (213), 64 states have internal predecessors, (213), 0 states have call successors, (0), 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 141 [2021-11-09 09:51:39,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:39,068 INFO L225 Difference]: With dead ends: 2544 [2021-11-09 09:51:39,068 INFO L226 Difference]: Without dead ends: 1654 [2021-11-09 09:51:39,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4030 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3100, Invalid=12400, Unknown=0, NotChecked=0, Total=15500 [2021-11-09 09:51:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-11-09 09:51:39,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1640. [2021-11-09 09:51:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 1.0835875533862112) internal successors, (1776), 1639 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1776 transitions. [2021-11-09 09:51:39,196 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1776 transitions. Word has length 141 [2021-11-09 09:51:39,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:39,196 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 1776 transitions. [2021-11-09 09:51:39,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.328125) internal successors, (213), 64 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1776 transitions. [2021-11-09 09:51:39,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-09 09:51:39,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:39,198 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 40, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:39,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:39,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-09 09:51:39,410 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:39,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:39,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2094903851, now seen corresponding path program 1 times [2021-11-09 09:51:39,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:39,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064756352] [2021-11-09 09:51:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:39,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 2 proven. 1246 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-11-09 09:51:39,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:39,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064756352] [2021-11-09 09:51:39,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064756352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:39,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028563008] [2021-11-09 09:51:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:39,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:39,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:39,497 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:39,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 09:51:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:40,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:51:40,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 2 proven. 1246 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-11-09 09:51:41,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028563008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:41,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:41,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-09 09:51:41,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896925107] [2021-11-09 09:51:41,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:51:41,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:41,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:51:41,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:51:41,403 INFO L87 Difference]: Start difference. First operand 1640 states and 1776 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:41,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:41,616 INFO L93 Difference]: Finished difference Result 1796 states and 1938 transitions. [2021-11-09 09:51:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:51:41,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 141 [2021-11-09 09:51:41,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:41,625 INFO L225 Difference]: With dead ends: 1796 [2021-11-09 09:51:41,626 INFO L226 Difference]: Without dead ends: 1720 [2021-11-09 09:51:41,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:51:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2021-11-09 09:51:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1714. [2021-11-09 09:51:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.0817279626386456) internal successors, (1853), 1713 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 1853 transitions. [2021-11-09 09:51:41,757 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 1853 transitions. Word has length 141 [2021-11-09 09:51:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:41,758 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 1853 transitions. [2021-11-09 09:51:41,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 1853 transitions. [2021-11-09 09:51:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-09 09:51:41,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:41,760 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 40, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:41,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:41,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 09:51:41,976 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:41,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:41,976 INFO L85 PathProgramCache]: Analyzing trace with hash 574504483, now seen corresponding path program 7 times [2021-11-09 09:51:41,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:41,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492609563] [2021-11-09 09:51:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:41,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 701 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:42,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:42,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492609563] [2021-11-09 09:51:42,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492609563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:42,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351871224] [2021-11-09 09:51:42,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:51:42,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:42,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:42,603 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:42,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 09:51:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:43,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 09:51:43,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 797 proven. 1751 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:51:44,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351871224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:44,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:44,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 65 [2021-11-09 09:51:44,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837054072] [2021-11-09 09:51:44,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-09 09:51:44,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:44,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-09 09:51:44,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=3210, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 09:51:44,752 INFO L87 Difference]: Start difference. First operand 1714 states and 1853 transitions. Second operand has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:46,848 INFO L93 Difference]: Finished difference Result 2006 states and 2163 transitions. [2021-11-09 09:51:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-11-09 09:51:46,849 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-09 09:51:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:46,854 INFO L225 Difference]: With dead ends: 2006 [2021-11-09 09:51:46,855 INFO L226 Difference]: Without dead ends: 1701 [2021-11-09 09:51:46,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7016 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5539, Invalid=19583, Unknown=0, NotChecked=0, Total=25122 [2021-11-09 09:51:46,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-11-09 09:51:46,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1566. [2021-11-09 09:51:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 1.0830670926517572) internal successors, (1695), 1565 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 1695 transitions. [2021-11-09 09:51:46,967 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 1695 transitions. Word has length 144 [2021-11-09 09:51:46,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:46,967 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 1695 transitions. [2021-11-09 09:51:46,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:46,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 1695 transitions. [2021-11-09 09:51:46,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-09 09:51:46,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:46,970 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 40, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:47,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:47,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 09:51:47,197 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:47,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:47,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1051056613, now seen corresponding path program 3 times [2021-11-09 09:51:47,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:47,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353897807] [2021-11-09 09:51:47,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:47,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 721 proven. 1238 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2021-11-09 09:51:47,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:47,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353897807] [2021-11-09 09:51:47,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353897807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:47,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777772689] [2021-11-09 09:51:47,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:51:47,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:47,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:47,533 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:47,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 09:51:48,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:51:48,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:48,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:51:48,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 1350 proven. 20 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-11-09 09:51:49,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777772689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:49,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:49,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 4] total 26 [2021-11-09 09:51:49,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991666857] [2021-11-09 09:51:49,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:51:49,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:49,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:51:49,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:51:49,072 INFO L87 Difference]: Start difference. First operand 1566 states and 1695 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 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) [2021-11-09 09:51:50,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:50,659 INFO L93 Difference]: Finished difference Result 2515 states and 2719 transitions. [2021-11-09 09:51:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-09 09:51:50,660 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 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 144 [2021-11-09 09:51:50,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:50,664 INFO L225 Difference]: With dead ends: 2515 [2021-11-09 09:51:50,664 INFO L226 Difference]: Without dead ends: 1151 [2021-11-09 09:51:50,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3000, Invalid=8130, Unknown=0, NotChecked=0, Total=11130 [2021-11-09 09:51:50,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-11-09 09:51:50,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1145. [2021-11-09 09:51:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 1.06993006993007) internal successors, (1224), 1144 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1224 transitions. [2021-11-09 09:51:50,771 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1224 transitions. Word has length 144 [2021-11-09 09:51:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:50,771 INFO L470 AbstractCegarLoop]: Abstraction has 1145 states and 1224 transitions. [2021-11-09 09:51:50,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 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) [2021-11-09 09:51:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1224 transitions. [2021-11-09 09:51:50,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-09 09:51:50,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:50,774 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 57, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:50,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-09 09:51:50,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:50,974 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:50,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:50,975 INFO L85 PathProgramCache]: Analyzing trace with hash -668312775, now seen corresponding path program 4 times [2021-11-09 09:51:50,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:50,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679726303] [2021-11-09 09:51:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:50,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 61 proven. 4267 refuted. 0 times theorem prover too weak. 1186 trivial. 0 not checked. [2021-11-09 09:51:51,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:51,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679726303] [2021-11-09 09:51:51,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679726303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:51,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060790756] [2021-11-09 09:51:51,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:51:51,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:51,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:51,685 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:51,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 09:51:52,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:51:52,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:52,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 09:51:52,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 532 proven. 4392 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-09 09:51:55,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060790756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:55,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:55,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 50] total 75 [2021-11-09 09:51:55,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377844649] [2021-11-09 09:51:55,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-09 09:51:55,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:55,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-09 09:51:55,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=4458, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 09:51:55,955 INFO L87 Difference]: Start difference. First operand 1145 states and 1224 transitions. Second operand has 75 states, 75 states have (on average 3.2133333333333334) internal successors, (241), 75 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:59,409 INFO L93 Difference]: Finished difference Result 1676 states and 1791 transitions. [2021-11-09 09:51:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-09 09:51:59,409 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.2133333333333334) internal successors, (241), 75 states have internal predecessors, (241), 0 states have call successors, (0), 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 209 [2021-11-09 09:51:59,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:59,413 INFO L225 Difference]: With dead ends: 1676 [2021-11-09 09:51:59,413 INFO L226 Difference]: Without dead ends: 768 [2021-11-09 09:51:59,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10117 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4357, Invalid=23699, Unknown=0, NotChecked=0, Total=28056 [2021-11-09 09:51:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-11-09 09:51:59,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 346. [2021-11-09 09:51:59,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.0231884057971015) internal successors, (353), 345 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 353 transitions. [2021-11-09 09:51:59,446 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 353 transitions. Word has length 209 [2021-11-09 09:51:59,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:59,447 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 353 transitions. [2021-11-09 09:51:59,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.2133333333333334) internal successors, (241), 75 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 353 transitions. [2021-11-09 09:51:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-09 09:51:59,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:59,448 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 60, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:59,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:59,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 09:51:59,673 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:59,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2084159889, now seen corresponding path program 2 times [2021-11-09 09:51:59,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:59,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656149474] [2021-11-09 09:51:59,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:59,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 4 proven. 3740 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2021-11-09 09:51:59,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:59,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656149474] [2021-11-09 09:51:59,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656149474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:59,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129774041] [2021-11-09 09:51:59,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:51:59,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:59,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:59,781 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:59,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 09:52:01,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:52:01,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:01,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:52:01,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 4 proven. 3740 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2021-11-09 09:52:02,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129774041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:02,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:02,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 09:52:02,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510491983] [2021-11-09 09:52:02,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:52:02,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:02,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:52:02,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:52:02,353 INFO L87 Difference]: Start difference. First operand 346 states and 353 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:02,407 INFO L93 Difference]: Finished difference Result 484 states and 495 transitions. [2021-11-09 09:52:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:52:02,407 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 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 209 [2021-11-09 09:52:02,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:02,409 INFO L225 Difference]: With dead ends: 484 [2021-11-09 09:52:02,409 INFO L226 Difference]: Without dead ends: 414 [2021-11-09 09:52:02,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:52:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-09 09:52:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2021-11-09 09:52:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.0217917675544794) internal successors, (422), 413 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 422 transitions. [2021-11-09 09:52:02,429 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 422 transitions. Word has length 209 [2021-11-09 09:52:02,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:02,429 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 422 transitions. [2021-11-09 09:52:02,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 422 transitions. [2021-11-09 09:52:02,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-09 09:52:02,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:02,430 INFO L513 BasicCegarLoop]: trace histogram [80, 80, 80, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:02,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-09 09:52:02,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 09:52:02,631 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:02,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:02,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1255336115, now seen corresponding path program 3 times [2021-11-09 09:52:02,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:02,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317880686] [2021-11-09 09:52:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:02,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9848 backedges. 6 proven. 7482 refuted. 0 times theorem prover too weak. 2360 trivial. 0 not checked. [2021-11-09 09:52:02,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:02,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317880686] [2021-11-09 09:52:02,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317880686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:02,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660926920] [2021-11-09 09:52:02,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:52:02,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:02,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:02,756 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:02,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 09:52:04,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2021-11-09 09:52:04,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:04,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:52:04,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9848 backedges. 6 proven. 7482 refuted. 0 times theorem prover too weak. 2360 trivial. 0 not checked. [2021-11-09 09:52:05,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660926920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:05,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:05,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-09 09:52:05,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074755964] [2021-11-09 09:52:05,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:52:05,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:05,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:52:05,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:52:05,767 INFO L87 Difference]: Start difference. First operand 414 states and 422 transitions. Second operand has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:05,897 INFO L93 Difference]: Finished difference Result 552 states and 564 transitions. [2021-11-09 09:52:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:52:05,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 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 277 [2021-11-09 09:52:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:05,901 INFO L225 Difference]: With dead ends: 552 [2021-11-09 09:52:05,901 INFO L226 Difference]: Without dead ends: 482 [2021-11-09 09:52:05,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:52:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-09 09:52:05,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2021-11-09 09:52:05,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.0207900207900207) internal successors, (491), 481 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 491 transitions. [2021-11-09 09:52:05,943 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 491 transitions. Word has length 277 [2021-11-09 09:52:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:05,945 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 491 transitions. [2021-11-09 09:52:05,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 491 transitions. [2021-11-09 09:52:05,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-09 09:52:05,948 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:05,948 INFO L513 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:05,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:06,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:06,173 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:06,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:06,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1898663689, now seen corresponding path program 4 times [2021-11-09 09:52:06,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:06,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799670916] [2021-11-09 09:52:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:06,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 15430 backedges. 8 proven. 12472 refuted. 0 times theorem prover too weak. 2950 trivial. 0 not checked. [2021-11-09 09:52:06,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:06,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799670916] [2021-11-09 09:52:06,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799670916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:06,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108297592] [2021-11-09 09:52:06,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:52:06,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:06,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:06,354 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:06,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 09:52:08,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:52:08,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:08,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:52:08,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 15430 backedges. 540 proven. 12530 refuted. 0 times theorem prover too weak. 2360 trivial. 0 not checked. [2021-11-09 09:52:10,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108297592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:10,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:10,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 29] total 36 [2021-11-09 09:52:10,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110583463] [2021-11-09 09:52:10,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 09:52:10,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:10,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 09:52:10,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=916, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:52:10,373 INFO L87 Difference]: Start difference. First operand 482 states and 491 transitions. Second operand has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:10,852 INFO L93 Difference]: Finished difference Result 621 states and 634 transitions. [2021-11-09 09:52:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:52:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 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 345 [2021-11-09 09:52:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:10,855 INFO L225 Difference]: With dead ends: 621 [2021-11-09 09:52:10,855 INFO L226 Difference]: Without dead ends: 551 [2021-11-09 09:52:10,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1064, Invalid=2016, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 09:52:10,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-09 09:52:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 550. [2021-11-09 09:52:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.0200364298724955) internal successors, (560), 549 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 560 transitions. [2021-11-09 09:52:10,881 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 560 transitions. Word has length 345 [2021-11-09 09:52:10,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:10,881 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 560 transitions. [2021-11-09 09:52:10,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 560 transitions. [2021-11-09 09:52:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2021-11-09 09:52:10,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:10,883 INFO L513 BasicCegarLoop]: trace histogram [120, 120, 120, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:10,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-09 09:52:11,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:52:11,084 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:11,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:11,084 INFO L85 PathProgramCache]: Analyzing trace with hash 874288955, now seen corresponding path program 5 times [2021-11-09 09:52:11,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:11,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416056678] [2021-11-09 09:52:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:11,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 10 proven. 18710 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2021-11-09 09:52:11,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:11,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416056678] [2021-11-09 09:52:11,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416056678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:11,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839758660] [2021-11-09 09:52:11,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:52:11,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:11,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:11,317 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:11,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 09:52:13,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2021-11-09 09:52:13,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:13,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 09:52:13,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 580 proven. 18730 refuted. 0 times theorem prover too weak. 2950 trivial. 0 not checked. [2021-11-09 09:52:15,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839758660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:15,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:15,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 31] total 39 [2021-11-09 09:52:15,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480612241] [2021-11-09 09:52:15,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 09:52:15,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:15,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 09:52:15,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1089, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:52:15,659 INFO L87 Difference]: Start difference. First operand 550 states and 560 transitions. Second operand has 39 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 39 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) [2021-11-09 09:52:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:16,493 INFO L93 Difference]: Finished difference Result 689 states and 703 transitions. [2021-11-09 09:52:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-09 09:52:16,493 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 39 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 413 [2021-11-09 09:52:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:16,497 INFO L225 Difference]: With dead ends: 689 [2021-11-09 09:52:16,497 INFO L226 Difference]: Without dead ends: 619 [2021-11-09 09:52:16,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2182, Invalid=4138, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 09:52:16,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-09 09:52:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 618. [2021-11-09 09:52:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.019448946515397) internal successors, (629), 617 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 629 transitions. [2021-11-09 09:52:16,551 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 629 transitions. Word has length 413 [2021-11-09 09:52:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:16,552 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 629 transitions. [2021-11-09 09:52:16,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 39 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) [2021-11-09 09:52:16,552 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 629 transitions. [2021-11-09 09:52:16,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-11-09 09:52:16,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:16,556 INFO L513 BasicCegarLoop]: trace histogram [140, 140, 140, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:16,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:16,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:16,756 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:16,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:16,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2038719617, now seen corresponding path program 6 times [2021-11-09 09:52:16,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:16,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850733811] [2021-11-09 09:52:16,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:16,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 30338 backedges. 12 proven. 26196 refuted. 0 times theorem prover too weak. 4130 trivial. 0 not checked. [2021-11-09 09:52:16,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:16,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850733811] [2021-11-09 09:52:16,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850733811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:16,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873712512] [2021-11-09 09:52:16,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:52:16,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:16,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:16,973 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:16,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 09:52:19,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 65 check-sat command(s) [2021-11-09 09:52:19,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:19,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:52:19,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30338 backedges. 12 proven. 26196 refuted. 0 times theorem prover too weak. 4130 trivial. 0 not checked. [2021-11-09 09:52:21,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873712512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:21,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:21,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-09 09:52:21,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964173015] [2021-11-09 09:52:21,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:52:21,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:21,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:52:21,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:52:21,748 INFO L87 Difference]: Start difference. First operand 618 states and 629 transitions. Second operand has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:21,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:21,842 INFO L93 Difference]: Finished difference Result 756 states and 771 transitions. [2021-11-09 09:52:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:52:21,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 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 481 [2021-11-09 09:52:21,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:21,846 INFO L225 Difference]: With dead ends: 756 [2021-11-09 09:52:21,846 INFO L226 Difference]: Without dead ends: 686 [2021-11-09 09:52:21,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:52:21,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-11-09 09:52:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 686. [2021-11-09 09:52:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 1.018978102189781) internal successors, (698), 685 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 698 transitions. [2021-11-09 09:52:21,881 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 698 transitions. Word has length 481 [2021-11-09 09:52:21,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:21,882 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 698 transitions. [2021-11-09 09:52:21,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:21,882 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 698 transitions. [2021-11-09 09:52:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2021-11-09 09:52:21,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:21,886 INFO L513 BasicCegarLoop]: trace histogram [160, 160, 160, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:21,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:22,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-09 09:52:22,101 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:22,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:22,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2034417091, now seen corresponding path program 7 times [2021-11-09 09:52:22,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:22,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178133235] [2021-11-09 09:52:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:22,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 39664 backedges. 14 proven. 34930 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2021-11-09 09:52:22,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:22,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178133235] [2021-11-09 09:52:22,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178133235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:22,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655058772] [2021-11-09 09:52:22,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:52:22,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:22,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:22,394 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:22,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 09:52:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:24,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:52:24,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 39664 backedges. 14 proven. 34930 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2021-11-09 09:52:27,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655058772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:27,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:27,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-09 09:52:27,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720136886] [2021-11-09 09:52:27,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:52:27,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:27,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:52:27,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:52:27,697 INFO L87 Difference]: Start difference. First operand 686 states and 698 transitions. Second operand has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 20 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:27,809 INFO L93 Difference]: Finished difference Result 824 states and 840 transitions. [2021-11-09 09:52:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:52:27,810 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 20 states have internal predecessors, (180), 0 states have call successors, (0), 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 549 [2021-11-09 09:52:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:27,812 INFO L225 Difference]: With dead ends: 824 [2021-11-09 09:52:27,813 INFO L226 Difference]: Without dead ends: 754 [2021-11-09 09:52:27,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:52:27,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-11-09 09:52:27,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2021-11-09 09:52:27,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 1.0185922974767596) internal successors, (767), 753 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 767 transitions. [2021-11-09 09:52:27,848 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 767 transitions. Word has length 549 [2021-11-09 09:52:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:27,849 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 767 transitions. [2021-11-09 09:52:27,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 20 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 767 transitions. [2021-11-09 09:52:27,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2021-11-09 09:52:27,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:27,853 INFO L513 BasicCegarLoop]: trace histogram [180, 180, 180, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:27,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-09 09:52:28,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 09:52:28,053 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:28,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:28,054 INFO L85 PathProgramCache]: Analyzing trace with hash -415039993, now seen corresponding path program 8 times [2021-11-09 09:52:28,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:28,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813768444] [2021-11-09 09:52:28,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:28,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 50238 backedges. 16 proven. 44912 refuted. 0 times theorem prover too weak. 5310 trivial. 0 not checked. [2021-11-09 09:52:28,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:28,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813768444] [2021-11-09 09:52:28,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813768444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:28,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339526491] [2021-11-09 09:52:28,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:52:28,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:28,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:28,325 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:28,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 09:52:30,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:52:30,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:30,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:52:31,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 50238 backedges. 16 proven. 44912 refuted. 0 times theorem prover too weak. 5310 trivial. 0 not checked. [2021-11-09 09:52:34,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339526491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:34,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:34,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-09 09:52:34,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937336248] [2021-11-09 09:52:34,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:52:34,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:34,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:52:34,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:52:34,336 INFO L87 Difference]: Start difference. First operand 754 states and 767 transitions. Second operand has 23 states, 23 states have (on average 8.782608695652174) internal successors, (202), 22 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:34,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:34,455 INFO L93 Difference]: Finished difference Result 892 states and 909 transitions. [2021-11-09 09:52:34,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:52:34,455 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 8.782608695652174) internal successors, (202), 22 states have internal predecessors, (202), 0 states have call successors, (0), 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 617 [2021-11-09 09:52:34,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:34,458 INFO L225 Difference]: With dead ends: 892 [2021-11-09 09:52:34,458 INFO L226 Difference]: Without dead ends: 822 [2021-11-09 09:52:34,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:52:34,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-11-09 09:52:34,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 822. [2021-11-09 09:52:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.0182704019488429) internal successors, (836), 821 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 836 transitions. [2021-11-09 09:52:34,565 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 836 transitions. Word has length 617 [2021-11-09 09:52:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:34,565 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 836 transitions. [2021-11-09 09:52:34,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.782608695652174) internal successors, (202), 22 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 836 transitions. [2021-11-09 09:52:34,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2021-11-09 09:52:34,571 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:34,571 INFO L513 BasicCegarLoop]: trace histogram [200, 200, 200, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:34,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:34,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:34,797 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:34,797 INFO L85 PathProgramCache]: Analyzing trace with hash -758293429, now seen corresponding path program 9 times [2021-11-09 09:52:34,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:34,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120599533] [2021-11-09 09:52:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:34,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 62060 backedges. 18 proven. 56142 refuted. 0 times theorem prover too weak. 5900 trivial. 0 not checked. [2021-11-09 09:52:35,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:35,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120599533] [2021-11-09 09:52:35,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120599533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:35,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621233160] [2021-11-09 09:52:35,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:52:35,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:35,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:35,109 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:35,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 09:52:38,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2021-11-09 09:52:38,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:38,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 09:52:38,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 62060 backedges. 18 proven. 56142 refuted. 0 times theorem prover too weak. 5900 trivial. 0 not checked. [2021-11-09 09:52:41,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621233160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:41,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:41,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-09 09:52:41,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445176021] [2021-11-09 09:52:41,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:52:41,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:41,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:52:41,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:52:41,952 INFO L87 Difference]: Start difference. First operand 822 states and 836 transitions. Second operand has 25 states, 25 states have (on average 8.96) internal successors, (224), 24 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:42,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:42,117 INFO L93 Difference]: Finished difference Result 960 states and 978 transitions. [2021-11-09 09:52:42,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:52:42,118 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.96) internal successors, (224), 24 states have internal predecessors, (224), 0 states have call successors, (0), 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 685 [2021-11-09 09:52:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:42,121 INFO L225 Difference]: With dead ends: 960 [2021-11-09 09:52:42,121 INFO L226 Difference]: Without dead ends: 890 [2021-11-09 09:52:42,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:52:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-11-09 09:52:42,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2021-11-09 09:52:42,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 1.0179977502812148) internal successors, (905), 889 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:42,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 905 transitions. [2021-11-09 09:52:42,161 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 905 transitions. Word has length 685 [2021-11-09 09:52:42,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:42,162 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 905 transitions. [2021-11-09 09:52:42,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.96) internal successors, (224), 24 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 905 transitions. [2021-11-09 09:52:42,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2021-11-09 09:52:42,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:42,166 INFO L513 BasicCegarLoop]: trace histogram [220, 220, 220, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:42,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:42,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:42,369 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:42,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:42,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1515005809, now seen corresponding path program 10 times [2021-11-09 09:52:42,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:42,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473783516] [2021-11-09 09:52:42,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:42,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 75130 backedges. 20 proven. 68620 refuted. 0 times theorem prover too weak. 6490 trivial. 0 not checked. [2021-11-09 09:52:42,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:42,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473783516] [2021-11-09 09:52:42,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473783516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:42,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363645623] [2021-11-09 09:52:42,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:52:42,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:42,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:42,811 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:42,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 09:52:46,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:52:46,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:46,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1142 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 09:52:46,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 75130 backedges. 552 proven. 68678 refuted. 0 times theorem prover too weak. 5900 trivial. 0 not checked. [2021-11-09 09:52:50,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363645623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:50,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:50,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 35] total 48 [2021-11-09 09:52:50,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230383559] [2021-11-09 09:52:50,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 09:52:50,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:50,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 09:52:50,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1717, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 09:52:50,757 INFO L87 Difference]: Start difference. First operand 890 states and 905 transitions. Second operand has 48 states, 48 states have (on average 6.375) internal successors, (306), 48 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:51,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:51,224 INFO L93 Difference]: Finished difference Result 1029 states and 1048 transitions. [2021-11-09 09:52:51,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:52:51,224 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.375) internal successors, (306), 48 states have internal predecessors, (306), 0 states have call successors, (0), 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 753 [2021-11-09 09:52:51,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:51,226 INFO L225 Difference]: With dead ends: 1029 [2021-11-09 09:52:51,226 INFO L226 Difference]: Without dead ends: 959 [2021-11-09 09:52:51,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1499, Invalid=3057, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 09:52:51,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-11-09 09:52:51,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 958. [2021-11-09 09:52:51,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 1.0177638453500522) internal successors, (974), 957 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 974 transitions. [2021-11-09 09:52:51,268 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 974 transitions. Word has length 753 [2021-11-09 09:52:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:51,269 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 974 transitions. [2021-11-09 09:52:51,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.375) internal successors, (306), 48 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 974 transitions. [2021-11-09 09:52:51,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2021-11-09 09:52:51,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:51,276 INFO L513 BasicCegarLoop]: trace histogram [240, 240, 240, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:51,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:51,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 09:52:51,505 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:51,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1900311251, now seen corresponding path program 11 times [2021-11-09 09:52:51,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:51,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604799196] [2021-11-09 09:52:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:51,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 89448 backedges. 22 proven. 82346 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2021-11-09 09:52:51,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:51,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604799196] [2021-11-09 09:52:51,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604799196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:51,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105305088] [2021-11-09 09:52:51,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:52:51,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:51,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:51,953 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:51,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 09:52:56,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 110 check-sat command(s) [2021-11-09 09:52:56,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:56,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 09:52:56,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 89448 backedges. 592 proven. 82366 refuted. 0 times theorem prover too weak. 6490 trivial. 0 not checked. [2021-11-09 09:53:01,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105305088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:01,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:01,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 37] total 51 [2021-11-09 09:53:01,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971316597] [2021-11-09 09:53:01,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 09:53:01,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:01,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 09:53:01,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 09:53:01,178 INFO L87 Difference]: Start difference. First operand 958 states and 974 transitions. Second operand has 51 states, 51 states have (on average 6.431372549019608) internal successors, (328), 51 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:02,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:02,047 INFO L93 Difference]: Finished difference Result 1097 states and 1117 transitions. [2021-11-09 09:53:02,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-09 09:53:02,047 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 6.431372549019608) internal successors, (328), 51 states have internal predecessors, (328), 0 states have call successors, (0), 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 821 [2021-11-09 09:53:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:02,049 INFO L225 Difference]: With dead ends: 1097 [2021-11-09 09:53:02,049 INFO L226 Difference]: Without dead ends: 1027 [2021-11-09 09:53:02,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1917 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2887, Invalid=5485, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 09:53:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-11-09 09:53:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 1026. [2021-11-09 09:53:02,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 1.0175609756097561) internal successors, (1043), 1025 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1043 transitions. [2021-11-09 09:53:02,093 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1043 transitions. Word has length 821 [2021-11-09 09:53:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:02,094 INFO L470 AbstractCegarLoop]: Abstraction has 1026 states and 1043 transitions. [2021-11-09 09:53:02,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.431372549019608) internal successors, (328), 51 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1043 transitions. [2021-11-09 09:53:02,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 890 [2021-11-09 09:53:02,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:02,101 INFO L513 BasicCegarLoop]: trace histogram [260, 260, 260, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:02,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:02,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:02,301 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:02,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash 777202455, now seen corresponding path program 12 times [2021-11-09 09:53:02,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:02,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682853415] [2021-11-09 09:53:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:02,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 105014 backedges. 24 proven. 97320 refuted. 0 times theorem prover too weak. 7670 trivial. 0 not checked. [2021-11-09 09:53:02,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:02,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682853415] [2021-11-09 09:53:02,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682853415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:02,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396580089] [2021-11-09 09:53:02,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:53:02,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:02,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:02,742 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:02,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 09:53:07,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 131 check-sat command(s) [2021-11-09 09:53:07,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:07,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:53:07,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 105014 backedges. 24 proven. 97320 refuted. 0 times theorem prover too weak. 7670 trivial. 0 not checked. [2021-11-09 09:53:12,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396580089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:12,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:12,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-11-09 09:53:12,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590673073] [2021-11-09 09:53:12,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 09:53:12,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 09:53:12,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=556, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:53:12,159 INFO L87 Difference]: Start difference. First operand 1026 states and 1043 transitions. Second operand has 31 states, 31 states have (on average 9.35483870967742) internal successors, (290), 30 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:12,308 INFO L93 Difference]: Finished difference Result 1164 states and 1185 transitions. [2021-11-09 09:53:12,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:53:12,308 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 9.35483870967742) internal successors, (290), 30 states have internal predecessors, (290), 0 states have call successors, (0), 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 889 [2021-11-09 09:53:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:12,311 INFO L225 Difference]: With dead ends: 1164 [2021-11-09 09:53:12,311 INFO L226 Difference]: Without dead ends: 1094 [2021-11-09 09:53:12,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=374, Invalid=556, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:53:12,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-11-09 09:53:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1094. [2021-11-09 09:53:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 1.0173833485818846) internal successors, (1112), 1093 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1112 transitions. [2021-11-09 09:53:12,360 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1112 transitions. Word has length 889 [2021-11-09 09:53:12,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:12,361 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1112 transitions. [2021-11-09 09:53:12,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.35483870967742) internal successors, (290), 30 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1112 transitions. [2021-11-09 09:53:12,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2021-11-09 09:53:12,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:12,370 INFO L513 BasicCegarLoop]: trace histogram [280, 280, 280, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:12,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:12,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:12,586 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:12,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:12,587 INFO L85 PathProgramCache]: Analyzing trace with hash -47185573, now seen corresponding path program 13 times [2021-11-09 09:53:12,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:12,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422707464] [2021-11-09 09:53:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:12,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 121828 backedges. 26 proven. 113542 refuted. 0 times theorem prover too weak. 8260 trivial. 0 not checked. [2021-11-09 09:53:13,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:13,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422707464] [2021-11-09 09:53:13,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422707464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:13,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501593367] [2021-11-09 09:53:13,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:53:13,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:13,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:13,097 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:13,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 09:53:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:18,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:53:18,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 121828 backedges. 26 proven. 113542 refuted. 0 times theorem prover too weak. 8260 trivial. 0 not checked. [2021-11-09 09:53:23,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501593367] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:23,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:23,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-11-09 09:53:23,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668106119] [2021-11-09 09:53:23,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 09:53:23,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 09:53:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:53:23,522 INFO L87 Difference]: Start difference. First operand 1094 states and 1112 transitions. Second operand has 33 states, 33 states have (on average 9.454545454545455) internal successors, (312), 32 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:23,701 INFO L93 Difference]: Finished difference Result 1232 states and 1254 transitions. [2021-11-09 09:53:23,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:53:23,706 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 9.454545454545455) internal successors, (312), 32 states have internal predecessors, (312), 0 states have call successors, (0), 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 957 [2021-11-09 09:53:23,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:23,709 INFO L225 Difference]: With dead ends: 1232 [2021-11-09 09:53:23,709 INFO L226 Difference]: Without dead ends: 1162 [2021-11-09 09:53:23,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 973 GetRequests, 942 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:53:23,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-11-09 09:53:23,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1162. [2021-11-09 09:53:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 1.0172265288544358) internal successors, (1181), 1161 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1181 transitions. [2021-11-09 09:53:23,775 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1181 transitions. Word has length 957 [2021-11-09 09:53:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:23,776 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1181 transitions. [2021-11-09 09:53:23,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.454545454545455) internal successors, (312), 32 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1181 transitions. [2021-11-09 09:53:23,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1026 [2021-11-09 09:53:23,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:23,784 INFO L513 BasicCegarLoop]: trace histogram [300, 300, 300, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:23,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-09 09:53:23,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 09:53:23,984 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:23,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1705768351, now seen corresponding path program 14 times [2021-11-09 09:53:23,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:23,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527789290] [2021-11-09 09:53:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:23,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 139890 backedges. 28 proven. 131012 refuted. 0 times theorem prover too weak. 8850 trivial. 0 not checked. [2021-11-09 09:53:24,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:24,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527789290] [2021-11-09 09:53:24,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527789290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:24,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492892065] [2021-11-09 09:53:24,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:53:24,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:24,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:24,520 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:24,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 09:53:30,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:53:30,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:30,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:53:30,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 139890 backedges. 28 proven. 131012 refuted. 0 times theorem prover too weak. 8850 trivial. 0 not checked. [2021-11-09 09:53:35,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492892065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:35,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:35,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-09 09:53:35,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730482179] [2021-11-09 09:53:35,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 09:53:35,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:35,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 09:53:35,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 09:53:35,393 INFO L87 Difference]: Start difference. First operand 1162 states and 1181 transitions. Second operand has 35 states, 35 states have (on average 9.542857142857143) internal successors, (334), 34 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:35,555 INFO L93 Difference]: Finished difference Result 1300 states and 1323 transitions. [2021-11-09 09:53:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:53:35,556 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 9.542857142857143) internal successors, (334), 34 states have internal predecessors, (334), 0 states have call successors, (0), 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 1025 [2021-11-09 09:53:35,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:35,558 INFO L225 Difference]: With dead ends: 1300 [2021-11-09 09:53:35,558 INFO L226 Difference]: Without dead ends: 1230 [2021-11-09 09:53:35,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 09:53:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-11-09 09:53:35,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1230. [2021-11-09 09:53:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 1.017087062652563) internal successors, (1250), 1229 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1250 transitions. [2021-11-09 09:53:35,608 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1250 transitions. Word has length 1025 [2021-11-09 09:53:35,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:35,609 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 1250 transitions. [2021-11-09 09:53:35,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.542857142857143) internal successors, (334), 34 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1250 transitions. [2021-11-09 09:53:35,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1094 [2021-11-09 09:53:35,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:35,618 INFO L513 BasicCegarLoop]: trace histogram [320, 320, 320, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:35,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-09 09:53:35,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 09:53:35,819 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:35,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:35,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1760032797, now seen corresponding path program 15 times [2021-11-09 09:53:35,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:35,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531443193] [2021-11-09 09:53:35,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:35,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 159200 backedges. 30 proven. 149730 refuted. 0 times theorem prover too weak. 9440 trivial. 0 not checked. [2021-11-09 09:53:36,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:36,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531443193] [2021-11-09 09:53:36,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531443193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:36,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647511429] [2021-11-09 09:53:36,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:53:36,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:36,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:36,458 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:36,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 09:53:43,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 134 check-sat command(s) [2021-11-09 09:53:43,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:43,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:53:43,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 159200 backedges. 30 proven. 149730 refuted. 0 times theorem prover too weak. 9440 trivial. 0 not checked. [2021-11-09 09:53:48,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647511429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:48,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:48,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-11-09 09:53:48,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630782764] [2021-11-09 09:53:48,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 09:53:48,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:48,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 09:53:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=802, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:53:48,947 INFO L87 Difference]: Start difference. First operand 1230 states and 1250 transitions. Second operand has 37 states, 37 states have (on average 9.621621621621621) internal successors, (356), 36 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:49,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:49,143 INFO L93 Difference]: Finished difference Result 1368 states and 1392 transitions. [2021-11-09 09:53:49,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:53:49,144 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 9.621621621621621) internal successors, (356), 36 states have internal predecessors, (356), 0 states have call successors, (0), 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 1093 [2021-11-09 09:53:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:49,147 INFO L225 Difference]: With dead ends: 1368 [2021-11-09 09:53:49,147 INFO L226 Difference]: Without dead ends: 1298 [2021-11-09 09:53:49,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1111 GetRequests, 1076 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=530, Invalid=802, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:53:49,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-11-09 09:53:49,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1298. [2021-11-09 09:53:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 1.0169622205088666) internal successors, (1319), 1297 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1319 transitions. [2021-11-09 09:53:49,201 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1319 transitions. Word has length 1093 [2021-11-09 09:53:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:49,202 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 1319 transitions. [2021-11-09 09:53:49,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.621621621621621) internal successors, (356), 36 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1319 transitions. [2021-11-09 09:53:49,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1162 [2021-11-09 09:53:49,212 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:49,212 INFO L513 BasicCegarLoop]: trace histogram [340, 340, 340, 17, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:49,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:49,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:49,413 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:49,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1471858649, now seen corresponding path program 16 times [2021-11-09 09:53:49,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:49,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28680345] [2021-11-09 09:53:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:49,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 179758 backedges. 32 proven. 169696 refuted. 0 times theorem prover too weak. 10030 trivial. 0 not checked. [2021-11-09 09:53:50,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:50,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28680345] [2021-11-09 09:53:50,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28680345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:50,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71463653] [2021-11-09 09:53:50,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:53:50,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:50,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:50,356 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:50,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 09:53:57,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:53:57,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:57,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1754 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 09:53:57,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:54:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 179758 backedges. 564 proven. 169754 refuted. 0 times theorem prover too weak. 9440 trivial. 0 not checked. [2021-11-09 09:54:04,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71463653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:54:04,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:54:04,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 41] total 60 [2021-11-09 09:54:04,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466891242] [2021-11-09 09:54:04,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-09 09:54:04,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:54:04,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-09 09:54:04,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2698, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 09:54:04,693 INFO L87 Difference]: Start difference. First operand 1298 states and 1319 transitions. Second operand has 60 states, 60 states have (on average 7.3) internal successors, (438), 60 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:05,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:54:05,291 INFO L93 Difference]: Finished difference Result 1437 states and 1462 transitions. [2021-11-09 09:54:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 09:54:05,296 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 7.3) internal successors, (438), 60 states have internal predecessors, (438), 0 states have call successors, (0), 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 1161 [2021-11-09 09:54:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:54:05,299 INFO L225 Difference]: With dead ends: 1437 [2021-11-09 09:54:05,299 INFO L226 Difference]: Without dead ends: 1367 [2021-11-09 09:54:05,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1200 GetRequests, 1122 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2042, Invalid=4278, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 09:54:05,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-11-09 09:54:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1366. [2021-11-09 09:54:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 1.0168498168498168) internal successors, (1388), 1365 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1388 transitions. [2021-11-09 09:54:05,362 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1388 transitions. Word has length 1161 [2021-11-09 09:54:05,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:54:05,363 INFO L470 AbstractCegarLoop]: Abstraction has 1366 states and 1388 transitions. [2021-11-09 09:54:05,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 7.3) internal successors, (438), 60 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1388 transitions. [2021-11-09 09:54:05,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1230 [2021-11-09 09:54:05,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:54:05,374 INFO L513 BasicCegarLoop]: trace histogram [360, 360, 360, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:54:05,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 09:54:05,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-09 09:54:05,575 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:54:05,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:54:05,575 INFO L85 PathProgramCache]: Analyzing trace with hash -679180693, now seen corresponding path program 17 times [2021-11-09 09:54:05,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:54:05,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630644696] [2021-11-09 09:54:05,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:54:05,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:54:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:54:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 201564 backedges. 34 proven. 190910 refuted. 0 times theorem prover too weak. 10620 trivial. 0 not checked. [2021-11-09 09:54:06,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:54:06,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630644696] [2021-11-09 09:54:06,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630644696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:54:06,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766191347] [2021-11-09 09:54:06,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:54:06,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:54:06,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:54:06,565 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:54:06,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 09:54:15,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 156 check-sat command(s) [2021-11-09 09:54:15,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:54:15,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 09:54:15,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:54:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 201564 backedges. 604 proven. 190930 refuted. 0 times theorem prover too weak. 10030 trivial. 0 not checked. [2021-11-09 09:54:23,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766191347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:54:23,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:54:23,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 43] total 63 [2021-11-09 09:54:23,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544826589] [2021-11-09 09:54:23,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-09 09:54:23,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:54:23,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-09 09:54:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=3015, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 09:54:23,143 INFO L87 Difference]: Start difference. First operand 1366 states and 1388 transitions. Second operand has 63 states, 63 states have (on average 7.301587301587301) internal successors, (460), 63 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:54:24,523 INFO L93 Difference]: Finished difference Result 1505 states and 1531 transitions. [2021-11-09 09:54:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-09 09:54:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 7.301587301587301) internal successors, (460), 63 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1229 [2021-11-09 09:54:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:54:24,525 INFO L225 Difference]: With dead ends: 1505 [2021-11-09 09:54:24,526 INFO L226 Difference]: Without dead ends: 1435 [2021-11-09 09:54:24,527 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1311 GetRequests, 1188 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4019 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5366, Invalid=10134, Unknown=0, NotChecked=0, Total=15500 [2021-11-09 09:54:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-11-09 09:54:24,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1434. [2021-11-09 09:54:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 1.0167480809490579) internal successors, (1457), 1433 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1457 transitions. [2021-11-09 09:54:24,590 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1457 transitions. Word has length 1229 [2021-11-09 09:54:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:54:24,591 INFO L470 AbstractCegarLoop]: Abstraction has 1434 states and 1457 transitions. [2021-11-09 09:54:24,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 7.301587301587301) internal successors, (460), 63 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1457 transitions. [2021-11-09 09:54:24,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1298 [2021-11-09 09:54:24,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:54:24,602 INFO L513 BasicCegarLoop]: trace histogram [380, 380, 380, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:54:24,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-09 09:54:24,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:54:24,803 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:54:24,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:54:24,803 INFO L85 PathProgramCache]: Analyzing trace with hash -895028561, now seen corresponding path program 18 times [2021-11-09 09:54:24,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:54:24,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68822966] [2021-11-09 09:54:24,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:54:24,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:54:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:54:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 224618 backedges. 36 proven. 213372 refuted. 0 times theorem prover too weak. 11210 trivial. 0 not checked. [2021-11-09 09:54:25,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:54:25,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68822966] [2021-11-09 09:54:25,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68822966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:54:25,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961948959] [2021-11-09 09:54:25,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:54:25,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:54:25,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:54:25,676 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:54:25,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 09:54:35,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 139 check-sat command(s) [2021-11-09 09:54:35,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:54:35,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1535 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:54:35,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:54:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 224618 backedges. 36 proven. 213372 refuted. 0 times theorem prover too weak. 11210 trivial. 0 not checked. [2021-11-09 09:54:42,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961948959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:54:42,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:54:42,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-11-09 09:54:42,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858308047] [2021-11-09 09:54:42,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 09:54:42,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:54:42,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 09:54:42,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=713, Invalid=1093, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:54:42,759 INFO L87 Difference]: Start difference. First operand 1434 states and 1457 transitions. Second operand has 43 states, 43 states have (on average 9.813953488372093) internal successors, (422), 42 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:42,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:54:42,982 INFO L93 Difference]: Finished difference Result 1572 states and 1599 transitions. [2021-11-09 09:54:42,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:54:42,982 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 9.813953488372093) internal successors, (422), 42 states have internal predecessors, (422), 0 states have call successors, (0), 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 1297 [2021-11-09 09:54:42,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:54:42,984 INFO L225 Difference]: With dead ends: 1572 [2021-11-09 09:54:42,984 INFO L226 Difference]: Without dead ends: 1502 [2021-11-09 09:54:42,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1318 GetRequests, 1277 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=713, Invalid=1093, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:54:42,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-11-09 09:54:43,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1502. [2021-11-09 09:54:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 1.016655562958028) internal successors, (1526), 1501 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 1526 transitions. [2021-11-09 09:54:43,046 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 1526 transitions. Word has length 1297 [2021-11-09 09:54:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:54:43,047 INFO L470 AbstractCegarLoop]: Abstraction has 1502 states and 1526 transitions. [2021-11-09 09:54:43,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 9.813953488372093) internal successors, (422), 42 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 1526 transitions. [2021-11-09 09:54:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1366 [2021-11-09 09:54:43,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:54:43,063 INFO L513 BasicCegarLoop]: trace histogram [400, 400, 400, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:54:43,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-09 09:54:43,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:54:43,277 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:54:43,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:54:43,277 INFO L85 PathProgramCache]: Analyzing trace with hash -822248205, now seen corresponding path program 19 times [2021-11-09 09:54:43,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:54:43,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119938296] [2021-11-09 09:54:43,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:54:43,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:54:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 09:54:43,807 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 09:54:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 09:54:44,557 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 09:54:44,557 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-09 09:54:44,558 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 09:54:44,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-09 09:54:44,564 INFO L731 BasicCegarLoop]: Path program histogram: [19, 7, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:54:44,569 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 09:54:45,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 09:54:45 BoogieIcfgContainer [2021-11-09 09:54:45,043 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 09:54:45,044 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 09:54:45,044 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 09:54:45,044 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 09:54:45,045 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:50:47" (3/4) ... [2021-11-09 09:54:45,046 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-09 09:54:45,608 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/witness.graphml [2021-11-09 09:54:45,609 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 09:54:45,611 INFO L168 Benchmark]: Toolchain (without parser) took 238200.10 ms. Allocated memory was 86.0 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 56.6 MB in the beginning and 349.4 MB in the end (delta: -292.7 MB). Peak memory consumption was 1.9 GB. Max. memory is 16.1 GB. [2021-11-09 09:54:45,611 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 86.0 MB. Free memory is still 55.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:54:45,612 INFO L168 Benchmark]: CACSL2BoogieTranslator took 211.07 ms. Allocated memory is still 86.0 MB. Free memory was 56.4 MB in the beginning and 46.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 09:54:45,613 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.34 ms. Allocated memory is still 86.0 MB. Free memory was 46.6 MB in the beginning and 45.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 09:54:45,613 INFO L168 Benchmark]: Boogie Preprocessor took 21.44 ms. Allocated memory is still 86.0 MB. Free memory was 45.1 MB in the beginning and 44.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:54:45,614 INFO L168 Benchmark]: RCFGBuilder took 274.74 ms. Allocated memory is still 86.0 MB. Free memory was 43.9 MB in the beginning and 33.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 09:54:45,614 INFO L168 Benchmark]: TraceAbstraction took 237085.71 ms. Allocated memory was 86.0 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 33.4 MB in the beginning and 336.8 MB in the end (delta: -303.5 MB). Peak memory consumption was 1.9 GB. Max. memory is 16.1 GB. [2021-11-09 09:54:45,614 INFO L168 Benchmark]: Witness Printer took 565.04 ms. Allocated memory is still 2.2 GB. Free memory was 336.8 MB in the beginning and 349.4 MB in the end (delta: -12.5 MB). Peak memory consumption was 66.7 MB. Max. memory is 16.1 GB. [2021-11-09 09:54:45,616 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 86.0 MB. Free memory is still 55.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 211.07 ms. Allocated memory is still 86.0 MB. Free memory was 56.4 MB in the beginning and 46.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.34 ms. Allocated memory is still 86.0 MB. Free memory was 46.6 MB in the beginning and 45.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.44 ms. Allocated memory is still 86.0 MB. Free memory was 45.1 MB in the beginning and 44.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 274.74 ms. Allocated memory is still 86.0 MB. Free memory was 43.9 MB in the beginning and 33.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 237085.71 ms. Allocated memory was 86.0 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 33.4 MB in the beginning and 336.8 MB in the end (delta: -303.5 MB). Peak memory consumption was 1.9 GB. Max. memory is 16.1 GB. * Witness Printer took 565.04 ms. Allocated memory is still 2.2 GB. Free memory was 336.8 MB in the beginning and 349.4 MB in the end (delta: -12.5 MB). Peak memory consumption was 66.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L9] int last ; [L18] int SIZE = 20; VAL [last=0, SIZE=20] [L20] last = __VERIFIER_nondet_int() [L6] COND FALSE !(!cond) VAL [last=22, SIZE=20] [L22] int a=0,b=0,c=0,st=0,d=0; VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND TRUE d == SIZE [L38] a = 0 [L39] b = 1 VAL [last=22, SIZE=20] [L11] COND TRUE !(cond) VAL [last=22, SIZE=20] [L12] reach_error() VAL [last=22, SIZE=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 236.5s, OverallIterations: 55, TraceHistogramMax: 400, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.1s, AutomataDifference: 31.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 756 SDtfs, 11102 SDslu, 3334 SDs, 0 SdLazy, 15137 SolverSat, 1694 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16863 GetRequests, 14566 SyntacticMatches, 2 SemanticMatches, 2295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60073 ImplicationChecksByTransitivity, 32.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1714occurred in iteration=34, InterpolantAutomatonStates: 1514, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.9s AutomataMinimizationTime, 54 MinimizatonAttempts, 6839 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 8.8s SatisfiabilityAnalysisTime, 101.6s InterpolantComputationTime, 31971 NumberOfCodeBlocks, 30611 NumberOfCodeBlocksAsserted, 1089 NumberOfCheckSat, 30506 ConstructedInterpolants, 0 QuantifiedInterpolants, 178480 SizeOfPredicates, 133 NumberOfNonLiveVariables, 23583 ConjunctsInSsa, 800 ConjunctsInUnsatCore, 100 InterpolantComputations, 12 PerfectInterpolantSequences, 253176/3128819 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 RESULT: Ultimate proved your program to be incorrect! [2021-11-09 09:54:45,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35bff7d7-b99d-4cb6-a8da-84d040aaac6c/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE