./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.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_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/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_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/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_455115a4-fcca-426e-a41e-a9bce9331c2a/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 a4747c803438fd958b3d4e84a35fe96864e05bdf175d42013e959092d33b0417 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:09:01,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:09:01,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:09:01,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:09:01,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:09:01,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:09:01,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:09:01,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:09:01,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:09:01,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:09:01,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:09:01,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:09:01,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:09:01,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:09:01,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:09:01,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:09:01,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:09:01,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:09:01,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:09:01,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:09:01,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:09:01,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:09:01,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:09:01,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:09:01,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:09:01,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:09:01,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:09:01,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:09:01,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:09:01,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:09:01,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:09:01,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:09:01,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:09:01,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:09:01,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:09:01,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:09:01,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:09:01,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:09:01,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:09:01,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:09:01,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:09:01,707 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:09:01,750 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:09:01,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:09:01,756 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:09:01,756 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:09:01,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:09:01,765 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:09:01,765 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:09:01,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:09:01,766 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:09:01,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:09:01,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:09:01,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:09:01,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:09:01,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:09:01,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:09:01,769 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:09:01,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:09:01,769 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:09:01,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:09:01,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:09:01,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:09:01,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:09:01,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:09:01,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:09:01,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:09:01,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:09:01,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:09:01,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:09:01,773 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:09:01,775 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:09:01,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:09:01,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:09:01,776 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_455115a4-fcca-426e-a41e-a9bce9331c2a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4747c803438fd958b3d4e84a35fe96864e05bdf175d42013e959092d33b0417 [2021-11-09 09:09:02,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:09:02,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:09:02,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:09:02,065 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:09:02,066 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:09:02,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-11-09 09:09:02,175 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/data/b99b049e0/72b8b3474d504646be24d859cd901279/FLAG1d67d6056 [2021-11-09 09:09:02,971 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:09:02,973 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-11-09 09:09:03,017 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/data/b99b049e0/72b8b3474d504646be24d859cd901279/FLAG1d67d6056 [2021-11-09 09:09:03,160 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/data/b99b049e0/72b8b3474d504646be24d859cd901279 [2021-11-09 09:09:03,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:09:03,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:09:03,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:09:03,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:09:03,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:09:03,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:09:03" (1/1) ... [2021-11-09 09:09:03,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35de7e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:03, skipping insertion in model container [2021-11-09 09:09:03,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:09:03" (1/1) ... [2021-11-09 09:09:03,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:09:03,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:09:03,687 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_455115a4-fcca-426e-a41e-a9bce9331c2a/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[6582,6595] [2021-11-09 09:09:03,750 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_455115a4-fcca-426e-a41e-a9bce9331c2a/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[13400,13413] [2021-11-09 09:09:04,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:09:04,913 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:09:04,949 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_455115a4-fcca-426e-a41e-a9bce9331c2a/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[6582,6595] [2021-11-09 09:09:04,962 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_455115a4-fcca-426e-a41e-a9bce9331c2a/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[13400,13413] [2021-11-09 09:09:05,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:09:05,570 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:09:05,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:05 WrapperNode [2021-11-09 09:09:05,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:09:05,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:09:05,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:09:05,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:09:05,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:05" (1/1) ... [2021-11-09 09:09:05,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:05" (1/1) ... [2021-11-09 09:09:06,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:09:06,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:09:06,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:09:06,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:09:06,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:05" (1/1) ... [2021-11-09 09:09:06,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:05" (1/1) ... [2021-11-09 09:09:06,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:05" (1/1) ... [2021-11-09 09:09:06,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:05" (1/1) ... [2021-11-09 09:09:06,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:05" (1/1) ... [2021-11-09 09:09:06,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:05" (1/1) ... [2021-11-09 09:09:06,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:05" (1/1) ... [2021-11-09 09:09:06,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:09:06,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:09:06,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:09:06,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:09:06,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:05" (1/1) ... [2021-11-09 09:09:06,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:09:06,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:06,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:09:06,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:09:06,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:09:06,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:09:06,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:09:06,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:09:11,558 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:09:11,558 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2021-11-09 09:09:11,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:09:11 BoogieIcfgContainer [2021-11-09 09:09:11,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:09:11,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:09:11,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:09:11,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:09:11,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:09:03" (1/3) ... [2021-11-09 09:09:11,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b1ed1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:09:11, skipping insertion in model container [2021-11-09 09:09:11,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:05" (2/3) ... [2021-11-09 09:09:11,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b1ed1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:09:11, skipping insertion in model container [2021-11-09 09:09:11,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:09:11" (3/3) ... [2021-11-09 09:09:11,571 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-11-09 09:09:11,579 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:09:11,580 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-09 09:09:11,646 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:09:11,652 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 09:09:11,653 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-09 09:09:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 877 states, 874 states have (on average 1.9050343249427917) internal successors, (1665), 876 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states 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 09:09:11,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:09:11,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:11,705 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:11,705 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:11,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:11,718 INFO L85 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2021-11-09 09:09:11,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:11,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598399226] [2021-11-09 09:09:11,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:11,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:11,916 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 09:09:11,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:11,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598399226] [2021-11-09 09:09:11,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598399226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:11,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:11,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:09:11,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306959148] [2021-11-09 09:09:11,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:09:11,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:11,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:09:11,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:09:11,944 INFO L87 Difference]: Start difference. First operand has 877 states, 874 states have (on average 1.9050343249427917) internal successors, (1665), 876 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:12,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:12,020 INFO L93 Difference]: Finished difference Result 1730 states and 3288 transitions. [2021-11-09 09:09:12,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:09:12,022 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 09:09:12,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:12,044 INFO L225 Difference]: With dead ends: 1730 [2021-11-09 09:09:12,045 INFO L226 Difference]: Without dead ends: 811 [2021-11-09 09:09:12,051 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 09:09:12,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-11-09 09:09:12,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2021-11-09 09:09:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 809 states have (on average 1.8936959208899877) internal successors, (1532), 810 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states 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 09:09:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1532 transitions. [2021-11-09 09:09:12,142 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1532 transitions. Word has length 26 [2021-11-09 09:09:12,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:12,143 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1532 transitions. [2021-11-09 09:09:12,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:12,143 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1532 transitions. [2021-11-09 09:09:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:09:12,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:12,145 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:12,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:09:12,146 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:12,147 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2021-11-09 09:09:12,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:12,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177353036] [2021-11-09 09:09:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:12,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:12,237 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 09:09:12,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:12,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177353036] [2021-11-09 09:09:12,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177353036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:12,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:12,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:09:12,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157398459] [2021-11-09 09:09:12,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:09:12,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:12,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:09:12,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:09:12,243 INFO L87 Difference]: Start difference. First operand 811 states and 1532 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:12,328 INFO L93 Difference]: Finished difference Result 850 states and 1591 transitions. [2021-11-09 09:09:12,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:09:12,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 09:09:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:12,334 INFO L225 Difference]: With dead ends: 850 [2021-11-09 09:09:12,335 INFO L226 Difference]: Without dead ends: 811 [2021-11-09 09:09:12,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:09:12,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-11-09 09:09:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2021-11-09 09:09:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 809 states have (on average 1.8739184177997528) internal successors, (1516), 810 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states 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 09:09:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1516 transitions. [2021-11-09 09:09:12,368 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1516 transitions. Word has length 26 [2021-11-09 09:09:12,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:12,368 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1516 transitions. [2021-11-09 09:09:12,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:12,369 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1516 transitions. [2021-11-09 09:09:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 09:09:12,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:12,371 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:12,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:09:12,372 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:12,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:12,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2021-11-09 09:09:12,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:12,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149655451] [2021-11-09 09:09:12,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:12,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:12,453 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 09:09:12,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:12,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149655451] [2021-11-09 09:09:12,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149655451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:12,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:12,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:09:12,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464286252] [2021-11-09 09:09:12,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:09:12,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:12,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:09:12,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:09:12,456 INFO L87 Difference]: Start difference. First operand 811 states and 1516 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:12,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:12,493 INFO L93 Difference]: Finished difference Result 875 states and 1616 transitions. [2021-11-09 09:09:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:09:12,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-09 09:09:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:12,499 INFO L225 Difference]: With dead ends: 875 [2021-11-09 09:09:12,500 INFO L226 Difference]: Without dead ends: 840 [2021-11-09 09:09:12,501 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 09:09:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-11-09 09:09:12,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 838. [2021-11-09 09:09:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 836 states have (on average 1.8648325358851674) internal successors, (1559), 837 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states 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 09:09:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1559 transitions. [2021-11-09 09:09:12,528 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1559 transitions. Word has length 41 [2021-11-09 09:09:12,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:12,529 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1559 transitions. [2021-11-09 09:09:12,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:12,529 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1559 transitions. [2021-11-09 09:09:12,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 09:09:12,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:12,531 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:12,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:09:12,532 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:12,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:12,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2021-11-09 09:09:12,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:12,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990366391] [2021-11-09 09:09:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:12,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:12,625 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 09:09:12,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:12,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990366391] [2021-11-09 09:09:12,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990366391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:12,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:12,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:09:12,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265231204] [2021-11-09 09:09:12,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:09:12,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:12,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:09:12,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:09:12,629 INFO L87 Difference]: Start difference. First operand 838 states and 1559 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:12,761 INFO L93 Difference]: Finished difference Result 1210 states and 2147 transitions. [2021-11-09 09:09:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:09:12,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-09 09:09:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:12,770 INFO L225 Difference]: With dead ends: 1210 [2021-11-09 09:09:12,770 INFO L226 Difference]: Without dead ends: 1148 [2021-11-09 09:09:12,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:09:12,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-11-09 09:09:12,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 898. [2021-11-09 09:09:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 896 states have (on average 1.84375) internal successors, (1652), 897 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 09:09:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1652 transitions. [2021-11-09 09:09:12,862 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1652 transitions. Word has length 41 [2021-11-09 09:09:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:12,862 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1652 transitions. [2021-11-09 09:09:12,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1652 transitions. [2021-11-09 09:09:12,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:09:12,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:12,865 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:12,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:09:12,865 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:12,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2021-11-09 09:09:12,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:12,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993115914] [2021-11-09 09:09:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:12,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:12,930 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 09:09:12,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:12,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993115914] [2021-11-09 09:09:12,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993115914] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:12,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:12,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:09:12,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413060151] [2021-11-09 09:09:12,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:09:12,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:09:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:09:12,934 INFO L87 Difference]: Start difference. First operand 898 states and 1652 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:12,971 INFO L93 Difference]: Finished difference Result 1079 states and 1933 transitions. [2021-11-09 09:09:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:09:12,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 09:09:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:12,978 INFO L225 Difference]: With dead ends: 1079 [2021-11-09 09:09:12,979 INFO L226 Difference]: Without dead ends: 957 [2021-11-09 09:09:12,980 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 09:09:12,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-11-09 09:09:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 955. [2021-11-09 09:09:13,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 953 states have (on average 1.8237145855194123) internal successors, (1738), 954 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states 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 09:09:13,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1738 transitions. [2021-11-09 09:09:13,009 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1738 transitions. Word has length 43 [2021-11-09 09:09:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:13,009 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 1738 transitions. [2021-11-09 09:09:13,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1738 transitions. [2021-11-09 09:09:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:09:13,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:13,011 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:13,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:09:13,012 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:13,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2021-11-09 09:09:13,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:13,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306104930] [2021-11-09 09:09:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:13,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:13,127 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 09:09:13,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:13,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306104930] [2021-11-09 09:09:13,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306104930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:13,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:13,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:09:13,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500084849] [2021-11-09 09:09:13,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:09:13,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:13,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:09:13,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:09:13,130 INFO L87 Difference]: Start difference. First operand 955 states and 1738 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:13,219 INFO L93 Difference]: Finished difference Result 1134 states and 2014 transitions. [2021-11-09 09:09:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:09:13,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 09:09:13,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:13,235 INFO L225 Difference]: With dead ends: 1134 [2021-11-09 09:09:13,235 INFO L226 Difference]: Without dead ends: 957 [2021-11-09 09:09:13,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:09:13,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-11-09 09:09:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 955. [2021-11-09 09:09:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 953 states have (on average 1.8205666316894018) internal successors, (1735), 954 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states 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 09:09:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1735 transitions. [2021-11-09 09:09:13,266 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1735 transitions. Word has length 43 [2021-11-09 09:09:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:13,266 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 1735 transitions. [2021-11-09 09:09:13,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1735 transitions. [2021-11-09 09:09:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:09:13,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:13,269 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:13,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:09:13,270 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:13,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:13,270 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2021-11-09 09:09:13,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:13,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727835248] [2021-11-09 09:09:13,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:13,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:13,338 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 09:09:13,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:13,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727835248] [2021-11-09 09:09:13,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727835248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:13,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:13,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:09:13,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730030221] [2021-11-09 09:09:13,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:09:13,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:13,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:09:13,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:09:13,341 INFO L87 Difference]: Start difference. First operand 955 states and 1735 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:13,378 INFO L93 Difference]: Finished difference Result 1273 states and 2219 transitions. [2021-11-09 09:09:13,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:09:13,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 09:09:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:13,386 INFO L225 Difference]: With dead ends: 1273 [2021-11-09 09:09:13,386 INFO L226 Difference]: Without dead ends: 1096 [2021-11-09 09:09:13,387 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 09:09:13,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-11-09 09:09:13,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1094. [2021-11-09 09:09:13,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1092 states have (on average 1.7765567765567765) internal successors, (1940), 1093 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 09:09:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1940 transitions. [2021-11-09 09:09:13,422 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1940 transitions. Word has length 43 [2021-11-09 09:09:13,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:13,422 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1940 transitions. [2021-11-09 09:09:13,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:13,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1940 transitions. [2021-11-09 09:09:13,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:09:13,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:13,423 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:13,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:09:13,424 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:13,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:13,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2021-11-09 09:09:13,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:13,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897155598] [2021-11-09 09:09:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:13,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:13,460 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 09:09:13,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:13,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897155598] [2021-11-09 09:09:13,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897155598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:13,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:13,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:09:13,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991069697] [2021-11-09 09:09:13,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:09:13,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:13,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:09:13,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:09:13,463 INFO L87 Difference]: Start difference. First operand 1094 states and 1940 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:13,510 INFO L93 Difference]: Finished difference Result 1654 states and 2774 transitions. [2021-11-09 09:09:13,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:09:13,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 09:09:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:13,519 INFO L225 Difference]: With dead ends: 1654 [2021-11-09 09:09:13,519 INFO L226 Difference]: Without dead ends: 1338 [2021-11-09 09:09:13,520 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 09:09:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-11-09 09:09:13,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1336. [2021-11-09 09:09:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1334 states have (on average 1.712143928035982) internal successors, (2284), 1335 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states 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 09:09:13,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2284 transitions. [2021-11-09 09:09:13,568 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2284 transitions. Word has length 43 [2021-11-09 09:09:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:13,569 INFO L470 AbstractCegarLoop]: Abstraction has 1336 states and 2284 transitions. [2021-11-09 09:09:13,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2284 transitions. [2021-11-09 09:09:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 09:09:13,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:13,570 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:13,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:09:13,570 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:13,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:13,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2021-11-09 09:09:13,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:13,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102574731] [2021-11-09 09:09:13,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:13,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:13,636 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 09:09:13,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:13,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102574731] [2021-11-09 09:09:13,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102574731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:13,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:13,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:09:13,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056940110] [2021-11-09 09:09:13,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:09:13,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:13,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:09:13,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:09:13,639 INFO L87 Difference]: Start difference. First operand 1336 states and 2284 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:13,744 INFO L93 Difference]: Finished difference Result 1843 states and 2996 transitions. [2021-11-09 09:09:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:09:13,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 09:09:13,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:13,756 INFO L225 Difference]: With dead ends: 1843 [2021-11-09 09:09:13,756 INFO L226 Difference]: Without dead ends: 1841 [2021-11-09 09:09:13,757 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:09:13,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-11-09 09:09:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1384. [2021-11-09 09:09:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1382 states have (on average 1.6845151953690305) internal successors, (2328), 1383 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:09:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2328 transitions. [2021-11-09 09:09:13,817 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2328 transitions. Word has length 44 [2021-11-09 09:09:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:13,818 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2328 transitions. [2021-11-09 09:09:13,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:13,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2328 transitions. [2021-11-09 09:09:13,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 09:09:13,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:13,819 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:13,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:09:13,820 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:13,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:13,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1037650968, now seen corresponding path program 1 times [2021-11-09 09:09:13,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:13,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650609237] [2021-11-09 09:09:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:13,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:13,868 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 09:09:13,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:13,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650609237] [2021-11-09 09:09:13,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650609237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:13,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:13,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:09:13,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619541761] [2021-11-09 09:09:13,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:09:13,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:13,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:09:13,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:09:13,871 INFO L87 Difference]: Start difference. First operand 1384 states and 2328 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:17,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:17,850 INFO L93 Difference]: Finished difference Result 2888 states and 5201 transitions. [2021-11-09 09:09:17,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:09:17,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 09:09:17,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:17,890 INFO L225 Difference]: With dead ends: 2888 [2021-11-09 09:09:17,890 INFO L226 Difference]: Without dead ends: 2135 [2021-11-09 09:09:17,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:09:17,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-11-09 09:09:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 2135. [2021-11-09 09:09:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2133 states have (on average 1.736052508204407) internal successors, (3703), 2134 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states 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 09:09:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3703 transitions. [2021-11-09 09:09:18,005 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3703 transitions. Word has length 61 [2021-11-09 09:09:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:18,006 INFO L470 AbstractCegarLoop]: Abstraction has 2135 states and 3703 transitions. [2021-11-09 09:09:18,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3703 transitions. [2021-11-09 09:09:18,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 09:09:18,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:18,008 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:18,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:09:18,009 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:18,009 INFO L85 PathProgramCache]: Analyzing trace with hash -638527781, now seen corresponding path program 1 times [2021-11-09 09:09:18,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:18,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311978281] [2021-11-09 09:09:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:18,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 09:09:18,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:18,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311978281] [2021-11-09 09:09:18,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311978281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:18,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:18,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:09:18,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713702038] [2021-11-09 09:09:18,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:09:18,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:18,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:09:18,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:09:18,117 INFO L87 Difference]: Start difference. First operand 2135 states and 3703 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 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 09:09:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:18,310 INFO L93 Difference]: Finished difference Result 4087 states and 6475 transitions. [2021-11-09 09:09:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:09:18,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 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 63 [2021-11-09 09:09:18,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:18,334 INFO L225 Difference]: With dead ends: 4087 [2021-11-09 09:09:18,334 INFO L226 Difference]: Without dead ends: 3481 [2021-11-09 09:09:18,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:09:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2021-11-09 09:09:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 2739. [2021-11-09 09:09:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2737 states have (on average 1.6642309097552064) internal successors, (4555), 2738 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states 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 09:09:18,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4555 transitions. [2021-11-09 09:09:18,460 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4555 transitions. Word has length 63 [2021-11-09 09:09:18,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:18,461 INFO L470 AbstractCegarLoop]: Abstraction has 2739 states and 4555 transitions. [2021-11-09 09:09:18,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 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 09:09:18,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4555 transitions. [2021-11-09 09:09:18,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 09:09:18,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:18,463 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:18,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:09:18,463 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:18,464 INFO L85 PathProgramCache]: Analyzing trace with hash 608979835, now seen corresponding path program 1 times [2021-11-09 09:09:18,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:18,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187290188] [2021-11-09 09:09:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:18,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:09:18,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:18,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187290188] [2021-11-09 09:09:18,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187290188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:18,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:18,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:09:18,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269237064] [2021-11-09 09:09:18,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:09:18,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:18,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:09:18,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:09:18,603 INFO L87 Difference]: Start difference. First operand 2739 states and 4555 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:18,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:18,799 INFO L93 Difference]: Finished difference Result 4691 states and 7327 transitions. [2021-11-09 09:09:18,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:09:18,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 09:09:18,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:18,829 INFO L225 Difference]: With dead ends: 4691 [2021-11-09 09:09:18,830 INFO L226 Difference]: Without dead ends: 4085 [2021-11-09 09:09:18,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:09:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-11-09 09:09:19,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 3647. [2021-11-09 09:09:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3647 states, 3645 states have (on average 1.5975308641975308) internal successors, (5823), 3646 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states 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 09:09:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 3647 states and 5823 transitions. [2021-11-09 09:09:19,024 INFO L78 Accepts]: Start accepts. Automaton has 3647 states and 5823 transitions. Word has length 63 [2021-11-09 09:09:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:19,024 INFO L470 AbstractCegarLoop]: Abstraction has 3647 states and 5823 transitions. [2021-11-09 09:09:19,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3647 states and 5823 transitions. [2021-11-09 09:09:19,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 09:09:19,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:19,026 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:19,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 09:09:19,027 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:19,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2078412817, now seen corresponding path program 1 times [2021-11-09 09:09:19,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:19,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958770620] [2021-11-09 09:09:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:19,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:09:19,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:19,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958770620] [2021-11-09 09:09:19,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958770620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:19,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:19,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:09:19,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094131611] [2021-11-09 09:09:19,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:09:19,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:19,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:09:19,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:09:19,087 INFO L87 Difference]: Start difference. First operand 3647 states and 5823 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:19,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:19,311 INFO L93 Difference]: Finished difference Result 4951 states and 7699 transitions. [2021-11-09 09:09:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:09:19,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 09:09:19,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:19,356 INFO L225 Difference]: With dead ends: 4951 [2021-11-09 09:09:19,356 INFO L226 Difference]: Without dead ends: 4517 [2021-11-09 09:09:19,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:09:19,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2021-11-09 09:09:19,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4079. [2021-11-09 09:09:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4079 states, 4077 states have (on average 1.5793475594800097) internal successors, (6439), 4078 states have internal predecessors, (6439), 0 states have call successors, (0), 0 states 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 09:09:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4079 states to 4079 states and 6439 transitions. [2021-11-09 09:09:19,590 INFO L78 Accepts]: Start accepts. Automaton has 4079 states and 6439 transitions. Word has length 63 [2021-11-09 09:09:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:19,590 INFO L470 AbstractCegarLoop]: Abstraction has 4079 states and 6439 transitions. [2021-11-09 09:09:19,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:19,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4079 states and 6439 transitions. [2021-11-09 09:09:19,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 09:09:19,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:19,598 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:19,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 09:09:19,599 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:19,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:19,599 INFO L85 PathProgramCache]: Analyzing trace with hash 47222752, now seen corresponding path program 1 times [2021-11-09 09:09:19,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:19,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283042829] [2021-11-09 09:09:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:19,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:19,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:19,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283042829] [2021-11-09 09:09:19,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283042829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:19,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:19,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:09:19,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598207046] [2021-11-09 09:09:19,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:09:19,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:19,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:09:19,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:09:19,663 INFO L87 Difference]: Start difference. First operand 4079 states and 6439 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 09:09:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:19,883 INFO L93 Difference]: Finished difference Result 6631 states and 10041 transitions. [2021-11-09 09:09:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:09:19,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-09 09:09:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:19,894 INFO L225 Difference]: With dead ends: 6631 [2021-11-09 09:09:19,895 INFO L226 Difference]: Without dead ends: 4081 [2021-11-09 09:09:19,899 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 09:09:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4081 states. [2021-11-09 09:09:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4081 to 4079. [2021-11-09 09:09:20,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4079 states, 4077 states have (on average 1.5670836399313222) internal successors, (6389), 4078 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states 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 09:09:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4079 states to 4079 states and 6389 transitions. [2021-11-09 09:09:20,145 INFO L78 Accepts]: Start accepts. Automaton has 4079 states and 6389 transitions. Word has length 64 [2021-11-09 09:09:20,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:20,146 INFO L470 AbstractCegarLoop]: Abstraction has 4079 states and 6389 transitions. [2021-11-09 09:09:20,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 09:09:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 4079 states and 6389 transitions. [2021-11-09 09:09:20,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 09:09:20,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:20,148 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:20,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 09:09:20,148 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash -39896042, now seen corresponding path program 1 times [2021-11-09 09:09:20,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:20,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496893044] [2021-11-09 09:09:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:20,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:20,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:20,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496893044] [2021-11-09 09:09:20,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496893044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:20,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:20,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:09:20,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528426882] [2021-11-09 09:09:20,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:09:20,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:20,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:09:20,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:09:20,206 INFO L87 Difference]: Start difference. First operand 4079 states and 6389 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 09:09:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:20,330 INFO L93 Difference]: Finished difference Result 5357 states and 8166 transitions. [2021-11-09 09:09:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:09:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-09 09:09:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:20,338 INFO L225 Difference]: With dead ends: 5357 [2021-11-09 09:09:20,339 INFO L226 Difference]: Without dead ends: 2807 [2021-11-09 09:09:20,345 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 09:09:20,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2021-11-09 09:09:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2805. [2021-11-09 09:09:20,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2803 states have (on average 1.6371744559400643) internal successors, (4589), 2804 states have internal predecessors, (4589), 0 states have call successors, (0), 0 states 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 09:09:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 4589 transitions. [2021-11-09 09:09:20,490 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 4589 transitions. Word has length 64 [2021-11-09 09:09:20,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:20,490 INFO L470 AbstractCegarLoop]: Abstraction has 2805 states and 4589 transitions. [2021-11-09 09:09:20,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 09:09:20,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 4589 transitions. [2021-11-09 09:09:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 09:09:20,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:20,492 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:20,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 09:09:20,493 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:20,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1159171252, now seen corresponding path program 1 times [2021-11-09 09:09:20,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:20,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026685089] [2021-11-09 09:09:20,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:20,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:20,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:20,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026685089] [2021-11-09 09:09:20,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026685089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:20,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430920203] [2021-11-09 09:09:20,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:20,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:20,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:20,730 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:20,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:09:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:20,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:09:20,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:09:21,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430920203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:21,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:21,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2021-11-09 09:09:21,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097671819] [2021-11-09 09:09:21,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:09:21,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:21,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:09:21,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:09:21,430 INFO L87 Difference]: Start difference. First operand 2805 states and 4589 transitions. Second operand has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 09:09:23,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:23,403 INFO L93 Difference]: Finished difference Result 9196 states and 13293 transitions. [2021-11-09 09:09:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:09:23,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-09 09:09:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:23,421 INFO L225 Difference]: With dead ends: 9196 [2021-11-09 09:09:23,421 INFO L226 Difference]: Without dead ends: 8222 [2021-11-09 09:09:23,425 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:09:23,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8222 states. [2021-11-09 09:09:23,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8222 to 5939. [2021-11-09 09:09:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5937 states have (on average 1.4781876368536297) internal successors, (8776), 5938 states have internal predecessors, (8776), 0 states have call successors, (0), 0 states 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 09:09:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 8776 transitions. [2021-11-09 09:09:23,833 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 8776 transitions. Word has length 64 [2021-11-09 09:09:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:23,833 INFO L470 AbstractCegarLoop]: Abstraction has 5939 states and 8776 transitions. [2021-11-09 09:09:23,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 09:09:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 8776 transitions. [2021-11-09 09:09:23,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:09:23,835 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:23,835 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:23,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:24,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:24,051 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1862030833, now seen corresponding path program 1 times [2021-11-09 09:09:24,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:24,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961696329] [2021-11-09 09:09:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:24,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:24,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:24,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961696329] [2021-11-09 09:09:24,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961696329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:24,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295689280] [2021-11-09 09:09:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:24,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:24,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:24,278 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:24,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:09:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:24,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:09:24,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:25,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295689280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:25,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:25,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-09 09:09:25,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761219777] [2021-11-09 09:09:25,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:09:25,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:25,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:09:25,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:09:25,552 INFO L87 Difference]: Start difference. First operand 5939 states and 8776 transitions. Second operand has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:29,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:29,416 INFO L93 Difference]: Finished difference Result 28219 states and 38514 transitions. [2021-11-09 09:09:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:09:29,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 09:09:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:29,468 INFO L225 Difference]: With dead ends: 28219 [2021-11-09 09:09:29,469 INFO L226 Difference]: Without dead ends: 23809 [2021-11-09 09:09:29,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 09:09:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23809 states. [2021-11-09 09:09:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23809 to 11219. [2021-11-09 09:09:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11219 states, 11217 states have (on average 1.3982348221449585) internal successors, (15684), 11218 states have internal predecessors, (15684), 0 states have call successors, (0), 0 states 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 09:09:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11219 states to 11219 states and 15684 transitions. [2021-11-09 09:09:30,628 INFO L78 Accepts]: Start accepts. Automaton has 11219 states and 15684 transitions. Word has length 65 [2021-11-09 09:09:30,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:30,629 INFO L470 AbstractCegarLoop]: Abstraction has 11219 states and 15684 transitions. [2021-11-09 09:09:30,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:30,629 INFO L276 IsEmpty]: Start isEmpty. Operand 11219 states and 15684 transitions. [2021-11-09 09:09:30,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:09:30,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:30,631 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:30,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:30,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:09:30,847 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:30,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:30,847 INFO L85 PathProgramCache]: Analyzing trace with hash 664153647, now seen corresponding path program 1 times [2021-11-09 09:09:30,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:30,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044660589] [2021-11-09 09:09:30,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:30,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:31,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:31,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044660589] [2021-11-09 09:09:31,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044660589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:31,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162293697] [2021-11-09 09:09:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:31,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:31,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:31,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:31,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:09:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:31,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:09:31,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:32,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162293697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:32,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:32,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-09 09:09:32,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674058498] [2021-11-09 09:09:32,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:09:32,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:32,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:09:32,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:09:32,347 INFO L87 Difference]: Start difference. First operand 11219 states and 15684 transitions. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 16 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 09:09:36,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:36,082 INFO L93 Difference]: Finished difference Result 52315 states and 69322 transitions. [2021-11-09 09:09:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:09:36,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 16 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 09:09:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:36,190 INFO L225 Difference]: With dead ends: 52315 [2021-11-09 09:09:36,190 INFO L226 Difference]: Without dead ends: 42625 [2021-11-09 09:09:36,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:09:36,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42625 states. [2021-11-09 09:09:38,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42625 to 27973. [2021-11-09 09:09:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27973 states, 27971 states have (on average 1.3381716778091595) internal successors, (37430), 27972 states have internal predecessors, (37430), 0 states have call successors, (0), 0 states 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 09:09:38,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27973 states to 27973 states and 37430 transitions. [2021-11-09 09:09:38,779 INFO L78 Accepts]: Start accepts. Automaton has 27973 states and 37430 transitions. Word has length 65 [2021-11-09 09:09:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:38,780 INFO L470 AbstractCegarLoop]: Abstraction has 27973 states and 37430 transitions. [2021-11-09 09:09:38,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 16 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 09:09:38,780 INFO L276 IsEmpty]: Start isEmpty. Operand 27973 states and 37430 transitions. [2021-11-09 09:09:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:09:38,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:38,783 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:38,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:39,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:09:39,011 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:39,011 INFO L85 PathProgramCache]: Analyzing trace with hash -386254747, now seen corresponding path program 1 times [2021-11-09 09:09:39,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:39,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207001935] [2021-11-09 09:09:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:39,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:39,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:39,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207001935] [2021-11-09 09:09:39,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207001935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:39,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:39,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:09:39,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891656619] [2021-11-09 09:09:39,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:09:39,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:39,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:09:39,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:09:39,083 INFO L87 Difference]: Start difference. First operand 27973 states and 37430 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:40,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:40,357 INFO L93 Difference]: Finished difference Result 39431 states and 52422 transitions. [2021-11-09 09:09:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:09:40,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 09:09:40,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:40,383 INFO L225 Difference]: With dead ends: 39431 [2021-11-09 09:09:40,383 INFO L226 Difference]: Without dead ends: 12987 [2021-11-09 09:09:40,413 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 09:09:40,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12987 states. [2021-11-09 09:09:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12987 to 12110. [2021-11-09 09:09:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12110 states, 12108 states have (on average 1.3589362405021472) internal successors, (16454), 12109 states have internal predecessors, (16454), 0 states have call successors, (0), 0 states 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 09:09:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12110 states to 12110 states and 16454 transitions. [2021-11-09 09:09:41,394 INFO L78 Accepts]: Start accepts. Automaton has 12110 states and 16454 transitions. Word has length 65 [2021-11-09 09:09:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:41,394 INFO L470 AbstractCegarLoop]: Abstraction has 12110 states and 16454 transitions. [2021-11-09 09:09:41,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 12110 states and 16454 transitions. [2021-11-09 09:09:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:09:41,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:41,396 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:41,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 09:09:41,397 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:41,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:41,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1828535725, now seen corresponding path program 1 times [2021-11-09 09:09:41,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:41,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192673794] [2021-11-09 09:09:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:41,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:09:41,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:41,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192673794] [2021-11-09 09:09:41,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192673794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:41,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:41,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:09:41,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214963995] [2021-11-09 09:09:41,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:09:41,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:41,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:09:41,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:09:41,457 INFO L87 Difference]: Start difference. First operand 12110 states and 16454 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:42,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:42,183 INFO L93 Difference]: Finished difference Result 20901 states and 27827 transitions. [2021-11-09 09:09:42,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:09:42,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 09:09:42,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:42,202 INFO L225 Difference]: With dead ends: 20901 [2021-11-09 09:09:42,202 INFO L226 Difference]: Without dead ends: 10393 [2021-11-09 09:09:42,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:09:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10393 states. [2021-11-09 09:09:43,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10393 to 10393. [2021-11-09 09:09:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10393 states, 10391 states have (on average 1.3489558271581177) internal successors, (14017), 10392 states have internal predecessors, (14017), 0 states have call successors, (0), 0 states 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 09:09:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10393 states to 10393 states and 14017 transitions. [2021-11-09 09:09:43,198 INFO L78 Accepts]: Start accepts. Automaton has 10393 states and 14017 transitions. Word has length 65 [2021-11-09 09:09:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:43,199 INFO L470 AbstractCegarLoop]: Abstraction has 10393 states and 14017 transitions. [2021-11-09 09:09:43,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 10393 states and 14017 transitions. [2021-11-09 09:09:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:09:43,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:43,201 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:43,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 09:09:43,202 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:43,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:43,202 INFO L85 PathProgramCache]: Analyzing trace with hash 269786861, now seen corresponding path program 1 times [2021-11-09 09:09:43,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:43,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920248778] [2021-11-09 09:09:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:43,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:09:43,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:43,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920248778] [2021-11-09 09:09:43,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920248778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:43,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:43,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:09:43,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312017578] [2021-11-09 09:09:43,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:09:43,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:43,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:09:43,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:09:43,268 INFO L87 Difference]: Start difference. First operand 10393 states and 14017 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:44,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:44,277 INFO L93 Difference]: Finished difference Result 16950 states and 22333 transitions. [2021-11-09 09:09:44,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:09:44,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 09:09:44,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:44,291 INFO L225 Difference]: With dead ends: 16950 [2021-11-09 09:09:44,291 INFO L226 Difference]: Without dead ends: 8197 [2021-11-09 09:09:44,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:09:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8197 states. [2021-11-09 09:09:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8197 to 8197. [2021-11-09 09:09:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8197 states, 8195 states have (on average 1.3550945698596706) internal successors, (11105), 8196 states have internal predecessors, (11105), 0 states have call successors, (0), 0 states 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 09:09:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8197 states to 8197 states and 11105 transitions. [2021-11-09 09:09:44,891 INFO L78 Accepts]: Start accepts. Automaton has 8197 states and 11105 transitions. Word has length 65 [2021-11-09 09:09:44,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:44,892 INFO L470 AbstractCegarLoop]: Abstraction has 8197 states and 11105 transitions. [2021-11-09 09:09:44,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 8197 states and 11105 transitions. [2021-11-09 09:09:44,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:09:44,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:44,893 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:44,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 09:09:44,894 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:44,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:44,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1061129165, now seen corresponding path program 1 times [2021-11-09 09:09:44,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:44,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431297444] [2021-11-09 09:09:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:44,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 09:09:44,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:44,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431297444] [2021-11-09 09:09:44,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431297444] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:44,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:44,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:09:44,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761592525] [2021-11-09 09:09:44,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:09:44,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:44,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:09:44,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:09:44,951 INFO L87 Difference]: Start difference. First operand 8197 states and 11105 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 09:09:45,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:45,647 INFO L93 Difference]: Finished difference Result 13363 states and 17578 transitions. [2021-11-09 09:09:45,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:09:45,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 09:09:45,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:45,657 INFO L225 Difference]: With dead ends: 13363 [2021-11-09 09:09:45,658 INFO L226 Difference]: Without dead ends: 6730 [2021-11-09 09:09:45,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:09:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6730 states. [2021-11-09 09:09:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6730 to 6730. [2021-11-09 09:09:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6730 states, 6728 states have (on average 1.3727705112960762) internal successors, (9236), 6729 states have internal predecessors, (9236), 0 states have call successors, (0), 0 states 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 09:09:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6730 states to 6730 states and 9236 transitions. [2021-11-09 09:09:46,180 INFO L78 Accepts]: Start accepts. Automaton has 6730 states and 9236 transitions. Word has length 65 [2021-11-09 09:09:46,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:46,181 INFO L470 AbstractCegarLoop]: Abstraction has 6730 states and 9236 transitions. [2021-11-09 09:09:46,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 09:09:46,181 INFO L276 IsEmpty]: Start isEmpty. Operand 6730 states and 9236 transitions. [2021-11-09 09:09:46,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 09:09:46,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:46,183 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:46,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 09:09:46,183 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:46,184 INFO L85 PathProgramCache]: Analyzing trace with hash 695787833, now seen corresponding path program 1 times [2021-11-09 09:09:46,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:46,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903135693] [2021-11-09 09:09:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:46,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:46,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:46,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903135693] [2021-11-09 09:09:46,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903135693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:46,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256094119] [2021-11-09 09:09:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:46,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:46,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:46,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:46,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:09:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:47,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 09:09:47,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:50,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256094119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:50,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:50,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2021-11-09 09:09:50,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671747004] [2021-11-09 09:09:50,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 09:09:50,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:50,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 09:09:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 09:09:50,969 INFO L87 Difference]: Start difference. First operand 6730 states and 9236 transitions. Second operand has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 09:09:56,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:56,324 INFO L93 Difference]: Finished difference Result 10293 states and 13781 transitions. [2021-11-09 09:09:56,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 09:09:56,325 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-09 09:09:56,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:56,334 INFO L225 Difference]: With dead ends: 10293 [2021-11-09 09:09:56,334 INFO L226 Difference]: Without dead ends: 8235 [2021-11-09 09:09:56,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1147, Invalid=6163, Unknown=0, NotChecked=0, Total=7310 [2021-11-09 09:09:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8235 states. [2021-11-09 09:09:56,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8235 to 6593. [2021-11-09 09:09:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6593 states, 6591 states have (on average 1.3803671673494158) internal successors, (9098), 6592 states have internal predecessors, (9098), 0 states have call successors, (0), 0 states 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 09:09:56,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6593 states to 6593 states and 9098 transitions. [2021-11-09 09:09:56,968 INFO L78 Accepts]: Start accepts. Automaton has 6593 states and 9098 transitions. Word has length 66 [2021-11-09 09:09:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:56,968 INFO L470 AbstractCegarLoop]: Abstraction has 6593 states and 9098 transitions. [2021-11-09 09:09:56,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 09:09:56,968 INFO L276 IsEmpty]: Start isEmpty. Operand 6593 states and 9098 transitions. [2021-11-09 09:09:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 09:09:56,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:56,969 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:56,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:57,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 09:09:57,179 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:57,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:57,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1166524545, now seen corresponding path program 1 times [2021-11-09 09:09:57,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:57,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116464343] [2021-11-09 09:09:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:57,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:57,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:57,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116464343] [2021-11-09 09:09:57,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116464343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:57,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897093635] [2021-11-09 09:09:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:57,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:57,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:57,926 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:57,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:09:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:58,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:09:58,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:03,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897093635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:03,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:03,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2021-11-09 09:10:03,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630769588] [2021-11-09 09:10:03,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 09:10:03,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:03,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 09:10:03,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1515, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 09:10:03,799 INFO L87 Difference]: Start difference. First operand 6593 states and 9098 transitions. Second operand has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 09:10:18,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:10:18,984 INFO L93 Difference]: Finished difference Result 12086 states and 15884 transitions. [2021-11-09 09:10:18,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-09 09:10:18,985 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-09 09:10:18,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:10:18,996 INFO L225 Difference]: With dead ends: 12086 [2021-11-09 09:10:18,996 INFO L226 Difference]: Without dead ends: 10470 [2021-11-09 09:10:19,003 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=2197, Invalid=11845, Unknown=0, NotChecked=0, Total=14042 [2021-11-09 09:10:19,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10470 states. [2021-11-09 09:10:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10470 to 6671. [2021-11-09 09:10:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 6669 states have (on average 1.381316539211276) internal successors, (9212), 6670 states have internal predecessors, (9212), 0 states have call successors, (0), 0 states 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 09:10:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 9212 transitions. [2021-11-09 09:10:19,641 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 9212 transitions. Word has length 66 [2021-11-09 09:10:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:10:19,642 INFO L470 AbstractCegarLoop]: Abstraction has 6671 states and 9212 transitions. [2021-11-09 09:10:19,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 09:10:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 9212 transitions. [2021-11-09 09:10:19,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 09:10:19,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:10:19,644 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:19,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-09 09:10:19,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 09:10:19,855 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:10:19,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:19,855 INFO L85 PathProgramCache]: Analyzing trace with hash 184750935, now seen corresponding path program 1 times [2021-11-09 09:10:19,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:19,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251126256] [2021-11-09 09:10:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:19,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:20,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:20,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251126256] [2021-11-09 09:10:20,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251126256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:20,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058914991] [2021-11-09 09:10:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:20,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:20,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:20,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:20,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:10:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:20,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 09:10:20,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:23,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058914991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:23,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:23,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-11-09 09:10:23,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646220849] [2021-11-09 09:10:23,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:10:23,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:23,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:10:23,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:10:23,154 INFO L87 Difference]: Start difference. First operand 6671 states and 9212 transitions. Second operand has 28 states, 28 states have (on average 4.035714285714286) internal successors, (113), 28 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 09:10:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:10:27,793 INFO L93 Difference]: Finished difference Result 9152 states and 12377 transitions. [2021-11-09 09:10:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 09:10:27,794 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.035714285714286) internal successors, (113), 28 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-09 09:10:27,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:10:27,804 INFO L225 Difference]: With dead ends: 9152 [2021-11-09 09:10:27,804 INFO L226 Difference]: Without dead ends: 6852 [2021-11-09 09:10:27,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=908, Invalid=4204, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 09:10:27,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6852 states. [2021-11-09 09:10:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6852 to 5834. [2021-11-09 09:10:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5834 states, 5832 states have (on average 1.3988340192043895) internal successors, (8158), 5833 states have internal predecessors, (8158), 0 states have call successors, (0), 0 states 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 09:10:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5834 states to 5834 states and 8158 transitions. [2021-11-09 09:10:28,407 INFO L78 Accepts]: Start accepts. Automaton has 5834 states and 8158 transitions. Word has length 67 [2021-11-09 09:10:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:10:28,407 INFO L470 AbstractCegarLoop]: Abstraction has 5834 states and 8158 transitions. [2021-11-09 09:10:28,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.035714285714286) internal successors, (113), 28 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 09:10:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 5834 states and 8158 transitions. [2021-11-09 09:10:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 09:10:28,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:10:28,409 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:28,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:28,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:28,623 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:10:28,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:28,623 INFO L85 PathProgramCache]: Analyzing trace with hash 176449111, now seen corresponding path program 1 times [2021-11-09 09:10:28,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:28,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189496018] [2021-11-09 09:10:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:28,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:28,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:28,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189496018] [2021-11-09 09:10:28,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189496018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:28,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236890251] [2021-11-09 09:10:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:28,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:28,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:28,981 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:28,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:10:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:29,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:10:29,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:31,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236890251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:31,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:31,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-11-09 09:10:31,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176058663] [2021-11-09 09:10:31,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:10:31,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:10:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:10:31,242 INFO L87 Difference]: Start difference. First operand 5834 states and 8158 transitions. Second operand has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 27 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 09:10:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:10:34,010 INFO L93 Difference]: Finished difference Result 10016 states and 13519 transitions. [2021-11-09 09:10:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:10:34,011 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 27 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 67 [2021-11-09 09:10:34,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:10:34,024 INFO L225 Difference]: With dead ends: 10016 [2021-11-09 09:10:34,024 INFO L226 Difference]: Without dead ends: 7977 [2021-11-09 09:10:34,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=531, Invalid=1821, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:10:34,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7977 states. [2021-11-09 09:10:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7977 to 4957. [2021-11-09 09:10:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4955 states have (on average 1.4282542885973764) internal successors, (7077), 4956 states have internal predecessors, (7077), 0 states have call successors, (0), 0 states 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 09:10:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 7077 transitions. [2021-11-09 09:10:34,640 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 7077 transitions. Word has length 67 [2021-11-09 09:10:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:10:34,640 INFO L470 AbstractCegarLoop]: Abstraction has 4957 states and 7077 transitions. [2021-11-09 09:10:34,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 27 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 09:10:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 7077 transitions. [2021-11-09 09:10:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 09:10:34,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:10:34,642 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:34,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:34,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:34,847 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:10:34,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:34,847 INFO L85 PathProgramCache]: Analyzing trace with hash 561901135, now seen corresponding path program 1 times [2021-11-09 09:10:34,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:34,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140737381] [2021-11-09 09:10:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:34,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:35,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:35,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140737381] [2021-11-09 09:10:35,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140737381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:35,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987278600] [2021-11-09 09:10:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:35,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:35,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:35,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:35,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:10:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:36,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:10:36,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:38,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987278600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:38,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:38,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-11-09 09:10:38,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543230131] [2021-11-09 09:10:38,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:10:38,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:38,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:10:38,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:10:38,427 INFO L87 Difference]: Start difference. First operand 4957 states and 7077 transitions. Second operand has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 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 09:10:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:10:40,881 INFO L93 Difference]: Finished difference Result 7227 states and 9862 transitions. [2021-11-09 09:10:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:10:40,882 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-09 09:10:40,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:10:40,887 INFO L225 Difference]: With dead ends: 7227 [2021-11-09 09:10:40,887 INFO L226 Difference]: Without dead ends: 5438 [2021-11-09 09:10:40,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:10:40,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5438 states. [2021-11-09 09:10:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5438 to 4105. [2021-11-09 09:10:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4103 states have (on average 1.470874969534487) internal successors, (6035), 4104 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states 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 09:10:41,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 6035 transitions. [2021-11-09 09:10:41,223 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 6035 transitions. Word has length 68 [2021-11-09 09:10:41,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:10:41,223 INFO L470 AbstractCegarLoop]: Abstraction has 4105 states and 6035 transitions. [2021-11-09 09:10:41,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 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 09:10:41,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 6035 transitions. [2021-11-09 09:10:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 09:10:41,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:10:41,225 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:41,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:41,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:10:41,431 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:10:41,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:41,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1362039845, now seen corresponding path program 1 times [2021-11-09 09:10:41,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:41,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905404237] [2021-11-09 09:10:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:41,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 30 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:41,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:41,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905404237] [2021-11-09 09:10:41,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905404237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:41,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349260316] [2021-11-09 09:10:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:41,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:41,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:41,771 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:41,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_455115a4-fcca-426e-a41e-a9bce9331c2a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:10:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:42,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:10:42,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 68 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:30,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349260316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:30,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:30,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-09 09:11:30,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720477987] [2021-11-09 09:11:30,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:11:30,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:30,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:11:30,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=347, Unknown=21, NotChecked=0, Total=420 [2021-11-09 09:11:30,283 INFO L87 Difference]: Start difference. First operand 4105 states and 6035 transitions. Second operand has 21 states, 21 states have (on average 9.714285714285714) internal successors, (204), 20 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)