./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/skipped.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/skipped.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF --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 0c36d485530e5f36dabf3b382821b7ad25023b1cbf4cb81b13349652fc8273f7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:53:04,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:53:04,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:53:04,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:53:04,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:53:04,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:53:04,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:53:04,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:53:04,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:53:04,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:53:04,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:53:04,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:53:04,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:53:04,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:53:04,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:53:04,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:53:04,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:53:04,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:53:04,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:53:04,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:53:04,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:53:04,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:53:04,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:53:04,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:53:04,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:53:04,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:53:04,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:53:04,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:53:04,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:53:04,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:53:04,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:53:04,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:53:04,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:53:04,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:53:04,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:53:04,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:53:04,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:53:04,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:53:04,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:53:04,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:53:04,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:53:04,676 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:53:04,708 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:53:04,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:53:04,709 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:53:04,709 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:53:04,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:53:04,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:53:04,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:53:04,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:53:04,722 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:53:04,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:53:04,723 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:53:04,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:53:04,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:53:04,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:53:04,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:53:04,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:53:04,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:53:04,725 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:53:04,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:53:04,726 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:53:04,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:53:04,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:53:04,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:53:04,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:53:04,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:53:04,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:53:04,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:53:04,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:53:04,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:53:04,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:53:04,729 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:53:04,729 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:53:04,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:53:04,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:53:04,730 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_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c36d485530e5f36dabf3b382821b7ad25023b1cbf4cb81b13349652fc8273f7 [2021-11-20 05:53:05,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:53:05,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:53:05,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:53:05,156 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:53:05,157 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:53:05,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-tiling/skipped.c [2021-11-20 05:53:05,255 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/data/93092cd4c/a394d7a19920482c81b9c49c74b3417d/FLAG054758779 [2021-11-20 05:53:05,800 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:53:05,801 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/sv-benchmarks/c/array-tiling/skipped.c [2021-11-20 05:53:05,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/data/93092cd4c/a394d7a19920482c81b9c49c74b3417d/FLAG054758779 [2021-11-20 05:53:06,103 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/data/93092cd4c/a394d7a19920482c81b9c49c74b3417d [2021-11-20 05:53:06,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:53:06,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:53:06,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:53:06,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:53:06,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:53:06,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:53:06" (1/1) ... [2021-11-20 05:53:06,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dee71bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:06, skipping insertion in model container [2021-11-20 05:53:06,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:53:06" (1/1) ... [2021-11-20 05:53:06,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:53:06,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:53:06,359 WARN L230 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_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/sv-benchmarks/c/array-tiling/skipped.c[398,411] [2021-11-20 05:53:06,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:53:06,394 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:53:06,410 WARN L230 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_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/sv-benchmarks/c/array-tiling/skipped.c[398,411] [2021-11-20 05:53:06,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:53:06,438 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:53:06,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:06 WrapperNode [2021-11-20 05:53:06,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:53:06,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:53:06,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:53:06,441 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:53:06,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:06" (1/1) ... [2021-11-20 05:53:06,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:06" (1/1) ... [2021-11-20 05:53:06,493 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-11-20 05:53:06,496 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:53:06,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:53:06,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:53:06,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:53:06,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:06" (1/1) ... [2021-11-20 05:53:06,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:06" (1/1) ... [2021-11-20 05:53:06,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:06" (1/1) ... [2021-11-20 05:53:06,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:06" (1/1) ... [2021-11-20 05:53:06,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:06" (1/1) ... [2021-11-20 05:53:06,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:06" (1/1) ... [2021-11-20 05:53:06,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:06" (1/1) ... [2021-11-20 05:53:06,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:53:06,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:53:06,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:53:06,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:53:06,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:06" (1/1) ... [2021-11-20 05:53:06,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:53:06,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:06,594 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:53:06,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:53:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:53:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:53:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:53:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:53:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:53:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:53:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:53:06,715 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:53:06,717 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:53:06,905 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:53:06,911 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:53:06,912 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 05:53:06,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:53:06 BoogieIcfgContainer [2021-11-20 05:53:06,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:53:06,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:53:06,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:53:06,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:53:06,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:53:06" (1/3) ... [2021-11-20 05:53:06,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3486829a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:53:06, skipping insertion in model container [2021-11-20 05:53:06,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:53:06" (2/3) ... [2021-11-20 05:53:06,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3486829a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:53:06, skipping insertion in model container [2021-11-20 05:53:06,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:53:06" (3/3) ... [2021-11-20 05:53:06,923 INFO L111 eAbstractionObserver]: Analyzing ICFG skipped.c [2021-11-20 05:53:06,929 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:53:06,929 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:53:06,979 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:53:06,987 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 [2021-11-20 05:53:06,988 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:53:07,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:07,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 05:53:07,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:07,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:07,011 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:07,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1607783550, now seen corresponding path program 1 times [2021-11-20 05:53:07,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:07,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885539500] [2021-11-20 05:53:07,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:07,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:53:07,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:07,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885539500] [2021-11-20 05:53:07,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885539500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:07,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:07,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:53:07,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41504558] [2021-11-20 05:53:07,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:07,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:53:07,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:07,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:53:07,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:53:07,218 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:07,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:07,233 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2021-11-20 05:53:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:53:07,236 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 05:53:07,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:07,244 INFO L225 Difference]: With dead ends: 43 [2021-11-20 05:53:07,245 INFO L226 Difference]: Without dead ends: 20 [2021-11-20 05:53:07,249 INFO L932 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 [2021-11-20 05:53:07,255 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:07,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:53:07,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-20 05:53:07,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-20 05:53:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-20 05:53:07,289 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2021-11-20 05:53:07,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:07,290 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-20 05:53:07,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-20 05:53:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 05:53:07,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:07,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:07,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:53:07,292 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:07,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:07,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1872951298, now seen corresponding path program 1 times [2021-11-20 05:53:07,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:07,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774652451] [2021-11-20 05:53:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:07,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:53:07,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:07,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774652451] [2021-11-20 05:53:07,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774652451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:07,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:07,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:53:07,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291587960] [2021-11-20 05:53:07,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:07,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:53:07,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:53:07,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:07,409 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:07,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:07,454 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-11-20 05:53:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:53:07,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 05:53:07,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:07,456 INFO L225 Difference]: With dead ends: 37 [2021-11-20 05:53:07,456 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 05:53:07,456 INFO L932 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 [2021-11-20 05:53:07,458 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:07,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:53:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 05:53:07,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-20 05:53:07,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-20 05:53:07,465 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2021-11-20 05:53:07,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:07,465 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-20 05:53:07,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-20 05:53:07,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 05:53:07,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:07,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:07,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:53:07,468 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:07,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:07,469 INFO L85 PathProgramCache]: Analyzing trace with hash -270152420, now seen corresponding path program 1 times [2021-11-20 05:53:07,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:07,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741128762] [2021-11-20 05:53:07,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:07,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:53:07,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:07,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741128762] [2021-11-20 05:53:07,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741128762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:07,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380301543] [2021-11-20 05:53:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:07,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:07,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:07,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:07,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:53:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:07,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:53:07,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:53:07,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:53:07,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380301543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:07,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:07,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-20 05:53:07,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099882285] [2021-11-20 05:53:07,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:07,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:53:07,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:07,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:53:07,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:53:07,880 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:07,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:07,945 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-11-20 05:53:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:53:07,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 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 14 [2021-11-20 05:53:07,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:07,947 INFO L225 Difference]: With dead ends: 39 [2021-11-20 05:53:07,947 INFO L226 Difference]: Without dead ends: 24 [2021-11-20 05:53:07,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:53:07,949 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:07,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:53:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-20 05:53:07,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-20 05:53:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-20 05:53:07,956 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2021-11-20 05:53:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:07,956 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-20 05:53:07,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-20 05:53:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 05:53:07,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:07,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:07,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 05:53:08,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:08,176 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:08,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:08,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1873689926, now seen corresponding path program 2 times [2021-11-20 05:53:08,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:08,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440959937] [2021-11-20 05:53:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:08,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:53:08,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:08,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440959937] [2021-11-20 05:53:08,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440959937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:08,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:08,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:53:08,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024144868] [2021-11-20 05:53:08,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:08,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:53:08,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:08,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:53:08,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:08,443 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:08,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:08,530 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-11-20 05:53:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:53:08,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 16 [2021-11-20 05:53:08,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:08,533 INFO L225 Difference]: With dead ends: 35 [2021-11-20 05:53:08,533 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 05:53:08,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:08,546 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:08,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 18 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:53:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 05:53:08,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-11-20 05:53:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-20 05:53:08,560 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-11-20 05:53:08,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:08,561 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-20 05:53:08,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-20 05:53:08,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 05:53:08,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:08,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:08,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:53:08,566 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:08,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:08,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1095507628, now seen corresponding path program 1 times [2021-11-20 05:53:08,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:08,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019012486] [2021-11-20 05:53:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:08,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:53:08,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:08,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019012486] [2021-11-20 05:53:08,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019012486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:08,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695369881] [2021-11-20 05:53:08,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:08,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:08,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:08,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:08,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:53:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:08,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:53:08,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:09,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 05:53:09,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-20 05:53:09,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:09,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:09,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-11-20 05:53:09,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:53:09,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-11-20 05:53:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:53:09,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:09,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-11-20 05:53:09,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 05:53:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:53:09,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695369881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:09,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:09,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2021-11-20 05:53:09,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167268501] [2021-11-20 05:53:09,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:09,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:53:09,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:09,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:53:09,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:53:09,572 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:10,046 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2021-11-20 05:53:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 05:53:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 05:53:10,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:10,049 INFO L225 Difference]: With dead ends: 79 [2021-11-20 05:53:10,049 INFO L226 Difference]: Without dead ends: 77 [2021-11-20 05:53:10,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-11-20 05:53:10,051 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 136 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:10,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 92 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:53:10,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-20 05:53:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 45. [2021-11-20 05:53:10,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 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) [2021-11-20 05:53:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2021-11-20 05:53:10,063 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2021-11-20 05:53:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:10,063 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-11-20 05:53:10,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2021-11-20 05:53:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 05:53:10,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:10,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:10,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:10,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:10,279 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:10,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:10,280 INFO L85 PathProgramCache]: Analyzing trace with hash -415449258, now seen corresponding path program 1 times [2021-11-20 05:53:10,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:10,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168587339] [2021-11-20 05:53:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:10,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:53:10,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:10,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168587339] [2021-11-20 05:53:10,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168587339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:10,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191712795] [2021-11-20 05:53:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:10,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:10,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:10,480 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:10,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:53:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:10,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:53:10,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:10,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:10,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 05:53:10,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:53:10,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-11-20 05:53:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:53:10,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:10,938 INFO L354 Elim1Store]: treesize reduction 8, result has 38.5 percent of original size [2021-11-20 05:53:10,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2021-11-20 05:53:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:53:10,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191712795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:10,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:10,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2021-11-20 05:53:10,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626643993] [2021-11-20 05:53:10,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:10,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 05:53:10,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:10,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 05:53:10,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:53:10,972 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:11,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:11,340 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-11-20 05:53:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 05:53:11,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 05:53:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:11,342 INFO L225 Difference]: With dead ends: 86 [2021-11-20 05:53:11,342 INFO L226 Difference]: Without dead ends: 84 [2021-11-20 05:53:11,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-11-20 05:53:11,344 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:11,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 81 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:53:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-20 05:53:11,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 39. [2021-11-20 05:53:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:11,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-11-20 05:53:11,364 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 21 [2021-11-20 05:53:11,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:11,365 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-11-20 05:53:11,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-11-20 05:53:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 05:53:11,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:11,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:11,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:11,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:11,583 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:11,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:11,584 INFO L85 PathProgramCache]: Analyzing trace with hash -952716724, now seen corresponding path program 1 times [2021-11-20 05:53:11,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:11,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849125988] [2021-11-20 05:53:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:11,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:53:11,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:11,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849125988] [2021-11-20 05:53:11,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849125988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:11,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358936217] [2021-11-20 05:53:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:11,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:11,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:11,772 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:11,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:53:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:11,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 05:53:11,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:12,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-20 05:53:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:53:12,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:12,133 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-20 05:53:12,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 05:53:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:53:12,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358936217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:12,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:12,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 14 [2021-11-20 05:53:12,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696901195] [2021-11-20 05:53:12,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:12,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:53:12,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:12,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:53:12,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:53:12,176 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-11-20 05:53:12,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:12,391 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-11-20 05:53:12,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:53:12,392 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 25 [2021-11-20 05:53:12,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:12,393 INFO L225 Difference]: With dead ends: 53 [2021-11-20 05:53:12,393 INFO L226 Difference]: Without dead ends: 51 [2021-11-20 05:53:12,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:53:12,394 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:12,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 62 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:53:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-20 05:53:12,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2021-11-20 05:53:12,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:12,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-20 05:53:12,401 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2021-11-20 05:53:12,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:12,402 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-20 05:53:12,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-11-20 05:53:12,402 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-20 05:53:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 05:53:12,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:12,404 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:12,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:12,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 05:53:12,631 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:12,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:12,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1643646272, now seen corresponding path program 1 times [2021-11-20 05:53:12,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:12,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913414038] [2021-11-20 05:53:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:12,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:53:12,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:12,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913414038] [2021-11-20 05:53:12,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913414038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:12,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380830691] [2021-11-20 05:53:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:12,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:12,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:12,775 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:12,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:53:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:12,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:53:12,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:53:13,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:53:13,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380830691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:13,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:13,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-20 05:53:13,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376435780] [2021-11-20 05:53:13,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:13,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:53:13,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:13,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:53:13,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:53:13,131 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:13,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:13,359 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-11-20 05:53:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:53:13,360 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 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 29 [2021-11-20 05:53:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:13,361 INFO L225 Difference]: With dead ends: 88 [2021-11-20 05:53:13,361 INFO L226 Difference]: Without dead ends: 51 [2021-11-20 05:53:13,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:53:13,362 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:13,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 67 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:53:13,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-20 05:53:13,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2021-11-20 05:53:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-20 05:53:13,370 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2021-11-20 05:53:13,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:13,370 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-20 05:53:13,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-20 05:53:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 05:53:13,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:13,372 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:13,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:13,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:13,573 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:13,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:13,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1334470626, now seen corresponding path program 2 times [2021-11-20 05:53:13,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:13,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54128683] [2021-11-20 05:53:13,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:13,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:53:13,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:13,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54128683] [2021-11-20 05:53:13,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54128683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:13,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308530948] [2021-11-20 05:53:13,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:53:13,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:13,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:13,925 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:13,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:53:13,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:53:13,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:13,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:53:13,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:53:14,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:53:14,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308530948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:14,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:14,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 24 [2021-11-20 05:53:14,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109013175] [2021-11-20 05:53:14,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:14,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:53:14,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:14,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:53:14,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:53:14,721 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:15,155 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-11-20 05:53:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:53:15,156 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-20 05:53:15,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:15,157 INFO L225 Difference]: With dead ends: 62 [2021-11-20 05:53:15,157 INFO L226 Difference]: Without dead ends: 49 [2021-11-20 05:53:15,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2021-11-20 05:53:15,159 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 182 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:15,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 64 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:53:15,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-20 05:53:15,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2021-11-20 05:53:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 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) [2021-11-20 05:53:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-11-20 05:53:15,167 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 31 [2021-11-20 05:53:15,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:15,167 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-11-20 05:53:15,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-11-20 05:53:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 05:53:15,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:15,169 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:15,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:15,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:15,370 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:15,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1713959812, now seen corresponding path program 3 times [2021-11-20 05:53:15,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:15,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876857727] [2021-11-20 05:53:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:15,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:53:15,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:15,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876857727] [2021-11-20 05:53:15,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876857727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:15,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544001298] [2021-11-20 05:53:15,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:53:15,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:15,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:15,786 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:15,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:53:15,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:53:15,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:15,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 05:53:15,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:15,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 05:53:16,001 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:53:16,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 05:53:16,247 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:53:16,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 28 [2021-11-20 05:53:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:53:16,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:16,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2021-11-20 05:53:16,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-20 05:53:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:53:16,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544001298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:16,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:16,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 23 [2021-11-20 05:53:16,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495847075] [2021-11-20 05:53:16,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:16,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:53:16,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:53:16,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:53:16,569 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:18,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:18,087 INFO L93 Difference]: Finished difference Result 195 states and 232 transitions. [2021-11-20 05:53:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 05:53:18,088 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 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 36 [2021-11-20 05:53:18,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:18,090 INFO L225 Difference]: With dead ends: 195 [2021-11-20 05:53:18,090 INFO L226 Difference]: Without dead ends: 167 [2021-11-20 05:53:18,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=355, Invalid=2195, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 05:53:18,093 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 250 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:18,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 214 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:53:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-20 05:53:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 62. [2021-11-20 05:53:18,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-20 05:53:18,106 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 36 [2021-11-20 05:53:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:18,107 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-20 05:53:18,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:18,107 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-20 05:53:18,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 05:53:18,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:18,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:18,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:18,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:53:18,328 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:18,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:18,328 INFO L85 PathProgramCache]: Analyzing trace with hash -135300444, now seen corresponding path program 1 times [2021-11-20 05:53:18,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:18,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580851691] [2021-11-20 05:53:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:18,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:53:19,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:19,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580851691] [2021-11-20 05:53:19,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580851691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:19,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674936809] [2021-11-20 05:53:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:19,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:19,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:19,280 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:19,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:53:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:19,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 05:53:19,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:19,591 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:53:19,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 05:53:19,869 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:53:19,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 28 [2021-11-20 05:53:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:53:19,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:20,235 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-20 05:53:20,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 05:53:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:53:20,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674936809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:20,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:20,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 10] total 34 [2021-11-20 05:53:20,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130101215] [2021-11-20 05:53:20,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:20,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:53:20,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:20,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:53:20,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:53:20,305 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:25,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:25,357 INFO L93 Difference]: Finished difference Result 409 states and 489 transitions. [2021-11-20 05:53:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-20 05:53:25,357 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-20 05:53:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:25,360 INFO L225 Difference]: With dead ends: 409 [2021-11-20 05:53:25,360 INFO L226 Difference]: Without dead ends: 312 [2021-11-20 05:53:25,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4009 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1896, Invalid=11214, Unknown=0, NotChecked=0, Total=13110 [2021-11-20 05:53:25,369 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 545 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:25,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 251 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 05:53:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-20 05:53:25,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 73. [2021-11-20 05:53:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 72 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2021-11-20 05:53:25,385 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 38 [2021-11-20 05:53:25,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:25,386 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2021-11-20 05:53:25,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2021-11-20 05:53:25,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 05:53:25,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:25,388 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:25,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:25,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:25,616 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:25,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:25,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1279355238, now seen corresponding path program 1 times [2021-11-20 05:53:25,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:25,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457774492] [2021-11-20 05:53:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:25,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:53:26,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:26,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457774492] [2021-11-20 05:53:26,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457774492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:26,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875072751] [2021-11-20 05:53:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:26,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:26,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:26,799 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:26,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:53:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:26,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 05:53:26,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:27,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-20 05:53:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:53:27,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:27,546 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-20 05:53:27,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 05:53:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:53:27,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875072751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:27,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:27,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 11] total 35 [2021-11-20 05:53:27,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655427612] [2021-11-20 05:53:27,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:27,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 05:53:27,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:27,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 05:53:27,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 05:53:27,603 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:29,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:29,882 INFO L93 Difference]: Finished difference Result 205 states and 251 transitions. [2021-11-20 05:53:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-20 05:53:29,883 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 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 42 [2021-11-20 05:53:29,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:29,886 INFO L225 Difference]: With dead ends: 205 [2021-11-20 05:53:29,886 INFO L226 Difference]: Without dead ends: 183 [2021-11-20 05:53:29,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=686, Invalid=5014, Unknown=0, NotChecked=0, Total=5700 [2021-11-20 05:53:29,890 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 313 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:29,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 209 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 05:53:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-20 05:53:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 63. [2021-11-20 05:53:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-11-20 05:53:29,905 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 42 [2021-11-20 05:53:29,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:29,906 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-11-20 05:53:29,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-11-20 05:53:29,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 05:53:29,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:29,908 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:29,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:30,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 05:53:30,135 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:30,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:30,136 INFO L85 PathProgramCache]: Analyzing trace with hash -135270640, now seen corresponding path program 2 times [2021-11-20 05:53:30,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:30,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480629848] [2021-11-20 05:53:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:30,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:53:30,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:30,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480629848] [2021-11-20 05:53:30,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480629848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:30,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287866212] [2021-11-20 05:53:30,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:53:30,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:30,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:30,291 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:30,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:53:30,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:53:30,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:30,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:53:30,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:53:30,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:30,767 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:53:30,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287866212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:30,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:30,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-20 05:53:30,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089114442] [2021-11-20 05:53:30,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:30,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 05:53:30,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:30,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 05:53:30,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:53:30,771 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:31,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:31,041 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2021-11-20 05:53:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:53:31,042 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 05:53:31,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:31,043 INFO L225 Difference]: With dead ends: 112 [2021-11-20 05:53:31,043 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 05:53:31,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2021-11-20 05:53:31,044 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 164 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:31,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 93 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:53:31,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 05:53:31,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2021-11-20 05:53:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-11-20 05:53:31,054 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 46 [2021-11-20 05:53:31,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:31,055 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-11-20 05:53:31,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-11-20 05:53:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 05:53:31,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:31,056 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:31,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:31,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:31,271 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:31,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1173702100, now seen corresponding path program 4 times [2021-11-20 05:53:31,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:31,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276817248] [2021-11-20 05:53:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:31,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 05:53:31,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:31,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276817248] [2021-11-20 05:53:31,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276817248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:31,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364299620] [2021-11-20 05:53:31,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:53:31,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:31,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:31,665 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:31,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:53:31,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:53:31,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:31,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:53:31,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 05:53:32,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 05:53:32,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364299620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:32,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:32,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 33 [2021-11-20 05:53:32,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676474067] [2021-11-20 05:53:32,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:32,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 05:53:32,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:32,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 05:53:32,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 05:53:32,837 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:33,595 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-11-20 05:53:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:53:33,596 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 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 48 [2021-11-20 05:53:33,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:33,596 INFO L225 Difference]: With dead ends: 81 [2021-11-20 05:53:33,596 INFO L226 Difference]: Without dead ends: 60 [2021-11-20 05:53:33,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=385, Invalid=1685, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 05:53:33,598 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 226 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:33,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 145 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:53:33,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-20 05:53:33,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-11-20 05:53:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 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) [2021-11-20 05:53:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-11-20 05:53:33,610 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 48 [2021-11-20 05:53:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:33,611 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-11-20 05:53:33,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:33,611 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-11-20 05:53:33,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 05:53:33,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:33,613 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:33,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:33,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:33,827 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:33,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:33,828 INFO L85 PathProgramCache]: Analyzing trace with hash -49846830, now seen corresponding path program 5 times [2021-11-20 05:53:33,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:33,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664351489] [2021-11-20 05:53:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:33,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 05:53:34,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:34,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664351489] [2021-11-20 05:53:34,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664351489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:34,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593908927] [2021-11-20 05:53:34,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:53:34,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:34,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:34,261 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:34,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 05:53:34,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 05:53:34,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:34,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:53:34,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 05:53:34,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:53:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 05:53:35,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593908927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:53:35,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:53:35,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2021-11-20 05:53:35,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752933385] [2021-11-20 05:53:35,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:53:35,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:53:35,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:35,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:53:35,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=872, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:53:35,439 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:35,869 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2021-11-20 05:53:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 05:53:35,871 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-20 05:53:35,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:35,872 INFO L225 Difference]: With dead ends: 106 [2021-11-20 05:53:35,872 INFO L226 Difference]: Without dead ends: 66 [2021-11-20 05:53:35,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 05:53:35,874 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 147 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:35,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 89 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:53:35,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-20 05:53:35,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2021-11-20 05:53:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 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) [2021-11-20 05:53:35,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-11-20 05:53:35,885 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 53 [2021-11-20 05:53:35,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:35,886 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-11-20 05:53:35,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:35,886 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-11-20 05:53:35,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 05:53:35,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:35,888 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:35,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:53:36,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 05:53:36,091 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:36,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1983674996, now seen corresponding path program 6 times [2021-11-20 05:53:36,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:36,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300471770] [2021-11-20 05:53:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:36,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:53:37,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:37,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300471770] [2021-11-20 05:53:37,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300471770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:53:37,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773904230] [2021-11-20 05:53:37,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:53:37,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:53:37,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:53:37,355 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:53:37,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 05:53:37,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-20 05:53:37,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:53:37,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-20 05:53:37,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:53:37,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 05:53:38,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2021-11-20 05:53:38,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:53:38,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-11-20 05:53:38,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:53:38,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 58 [2021-11-20 05:53:38,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:53:38,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 77 [2021-11-20 05:53:38,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:38,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:53:38,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 103 [2021-11-20 05:53:40,155 INFO L354 Elim1Store]: treesize reduction 40, result has 34.4 percent of original size [2021-11-20 05:53:40,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 76 treesize of output 66 [2021-11-20 05:53:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:53:40,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:03,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 161 [2021-11-20 05:54:03,920 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-20 05:54:03,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42139 treesize of output 41803 [2021-11-20 05:56:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 05:56:09,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773904230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:09,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:09,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 22] total 64 [2021-11-20 05:56:09,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564878318] [2021-11-20 05:56:09,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:09,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-20 05:56:09,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:09,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-20 05:56:09,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=3371, Unknown=13, NotChecked=0, Total=4032 [2021-11-20 05:56:09,348 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 64 states, 64 states have (on average 2.25) internal successors, (144), 64 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:33,890 WARN L227 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 89 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:57:07,946 WARN L227 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 82 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:57:34,557 WARN L227 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 103 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:57:59,230 WARN L227 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 73 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:58:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:58:15,290 INFO L93 Difference]: Finished difference Result 271 states and 333 transitions. [2021-11-20 05:58:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-20 05:58:15,291 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.25) internal successors, (144), 64 states have internal predecessors, (144), 0 states have call successors, (0), 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 55 [2021-11-20 05:58:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:58:15,292 INFO L225 Difference]: With dead ends: 271 [2021-11-20 05:58:15,292 INFO L226 Difference]: Without dead ends: 210 [2021-11-20 05:58:15,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 84 SyntacticMatches, 21 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8792 ImplicationChecksByTransitivity, 148.8s TimeCoverageRelationStatistics Valid=3399, Invalid=20723, Unknown=58, NotChecked=0, Total=24180 [2021-11-20 05:58:15,302 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 807 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 3779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1885 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:15,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 480 Invalid, 3779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 1436 Invalid, 0 Unknown, 1885 Unchecked, 1.4s Time] [2021-11-20 05:58:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-20 05:58:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 96. [2021-11-20 05:58:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2526315789473683) internal successors, (119), 95 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) [2021-11-20 05:58:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-11-20 05:58:15,323 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 55 [2021-11-20 05:58:15,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:58:15,324 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-11-20 05:58:15,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.25) internal successors, (144), 64 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-11-20 05:58:15,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 05:58:15,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:15,326 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:15,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:58:15,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 05:58:15,551 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:15,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:15,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2124223606, now seen corresponding path program 2 times [2021-11-20 05:58:15,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:58:15,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123601080] [2021-11-20 05:58:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:15,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:58:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:58:16,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:58:16,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123601080] [2021-11-20 05:58:16,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123601080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:58:16,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505442169] [2021-11-20 05:58:16,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:58:16,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:16,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:58:16,787 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:58:16,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 05:58:16,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:58:16,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:58:16,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 05:58:16,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:17,096 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:58:17,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 05:58:17,418 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:58:17,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 28 [2021-11-20 05:58:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:58:17,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:58:17,622 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-20 05:58:17,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 05:58:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 05:58:17,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505442169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:58:17,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:58:17,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 13] total 38 [2021-11-20 05:58:17,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837825997] [2021-11-20 05:58:17,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:58:17,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 05:58:17,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:58:17,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 05:58:17,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 05:58:17,682 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 38 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:21,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:58:21,582 INFO L93 Difference]: Finished difference Result 370 states and 482 transitions. [2021-11-20 05:58:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-20 05:58:21,583 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 38 states have internal predecessors, (118), 0 states have call successors, (0), 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 55 [2021-11-20 05:58:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:58:21,585 INFO L225 Difference]: With dead ends: 370 [2021-11-20 05:58:21,585 INFO L226 Difference]: Without dead ends: 368 [2021-11-20 05:58:21,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2635 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1049, Invalid=8263, Unknown=0, NotChecked=0, Total=9312 [2021-11-20 05:58:21,586 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 551 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:21,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 403 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 05:58:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-20 05:58:21,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 104. [2021-11-20 05:58:21,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.2524271844660195) internal successors, (129), 103 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 129 transitions. [2021-11-20 05:58:21,611 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 129 transitions. Word has length 55 [2021-11-20 05:58:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:58:21,611 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 129 transitions. [2021-11-20 05:58:21,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 38 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 129 transitions. [2021-11-20 05:58:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 05:58:21,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:21,613 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:21,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:58:21,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 05:58:21,827 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:21,828 INFO L85 PathProgramCache]: Analyzing trace with hash 828798828, now seen corresponding path program 3 times [2021-11-20 05:58:21,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:58:21,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636182238] [2021-11-20 05:58:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:21,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:58:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:58:22,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:58:22,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636182238] [2021-11-20 05:58:22,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636182238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:58:22,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183937744] [2021-11-20 05:58:22,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:58:22,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:22,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:58:22,800 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:58:22,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 05:58:22,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 05:58:22,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:58:22,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 05:58:22,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:23,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-20 05:58:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 05:58:23,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:58:23,581 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-20 05:58:23,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 05:58:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 05:58:23,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183937744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:58:23,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:58:23,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 37 [2021-11-20 05:58:23,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654576270] [2021-11-20 05:58:23,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:58:23,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 05:58:23,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:58:23,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 05:58:23,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 05:58:23,658 INFO L87 Difference]: Start difference. First operand 104 states and 129 transitions. Second operand has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 37 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:58:28,354 INFO L93 Difference]: Finished difference Result 490 states and 658 transitions. [2021-11-20 05:58:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-20 05:58:28,355 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 37 states have internal predecessors, (109), 0 states have call successors, (0), 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 59 [2021-11-20 05:58:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:58:28,358 INFO L225 Difference]: With dead ends: 490 [2021-11-20 05:58:28,358 INFO L226 Difference]: Without dead ends: 488 [2021-11-20 05:58:28,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4172 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1552, Invalid=11788, Unknown=0, NotChecked=0, Total=13340 [2021-11-20 05:58:28,362 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1103 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 927 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:28,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1103 Valid, 271 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [927 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 05:58:28,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-20 05:58:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 91. [2021-11-20 05:58:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2222222222222223) internal successors, (110), 90 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2021-11-20 05:58:28,387 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 59 [2021-11-20 05:58:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:58:28,387 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2021-11-20 05:58:28,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 37 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:28,388 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2021-11-20 05:58:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 05:58:28,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:28,389 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:28,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:58:28,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 05:58:28,599 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:28,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1439230238, now seen corresponding path program 4 times [2021-11-20 05:58:28,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:58:28,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105333685] [2021-11-20 05:58:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:28,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:58:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 51 proven. 57 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 05:58:28,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:58:28,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105333685] [2021-11-20 05:58:28,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105333685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:58:28,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438447314] [2021-11-20 05:58:28,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:58:28,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:28,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:58:28,835 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:58:28,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 05:58:28,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:58:28,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:58:28,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 05:58:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 05:58:29,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:58:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 05:58:29,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438447314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:58:29,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:58:29,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-11-20 05:58:29,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580269443] [2021-11-20 05:58:29,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:58:29,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 05:58:29,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:58:29,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 05:58:29,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-11-20 05:58:29,427 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:29,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:58:29,872 INFO L93 Difference]: Finished difference Result 252 states and 310 transitions. [2021-11-20 05:58:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 05:58:29,872 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-20 05:58:29,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:58:29,875 INFO L225 Difference]: With dead ends: 252 [2021-11-20 05:58:29,876 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 05:58:29,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=953, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 05:58:29,878 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 256 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:29,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 116 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:58:29,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 05:58:29,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 93. [2021-11-20 05:58:29,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 92 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2021-11-20 05:58:29,900 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 63 [2021-11-20 05:58:29,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:58:29,900 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2021-11-20 05:58:29,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:29,900 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2021-11-20 05:58:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 05:58:29,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:29,901 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:29,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:58:30,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:30,103 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:30,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:30,104 INFO L85 PathProgramCache]: Analyzing trace with hash -69449468, now seen corresponding path program 5 times [2021-11-20 05:58:30,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:58:30,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666412194] [2021-11-20 05:58:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:30,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:58:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 25 proven. 42 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-20 05:58:30,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:58:30,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666412194] [2021-11-20 05:58:30,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666412194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:58:30,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673114178] [2021-11-20 05:58:30,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:58:30,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:30,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:58:30,559 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:58:30,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 05:58:30,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 05:58:30,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:58:30,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:58:30,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-20 05:58:31,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:58:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-20 05:58:32,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673114178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:58:32,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:58:32,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2021-11-20 05:58:32,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476663708] [2021-11-20 05:58:32,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:58:32,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 05:58:32,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:58:32,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 05:58:32,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 05:58:32,297 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 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) [2021-11-20 05:58:32,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:58:32,944 INFO L93 Difference]: Finished difference Result 154 states and 186 transitions. [2021-11-20 05:58:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 05:58:32,944 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 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 65 [2021-11-20 05:58:32,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:58:32,945 INFO L225 Difference]: With dead ends: 154 [2021-11-20 05:58:32,945 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 05:58:32,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 05:58:32,947 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 422 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:32,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 116 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:58:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 05:58:32,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 100. [2021-11-20 05:58:32,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 99 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2021-11-20 05:58:32,970 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 65 [2021-11-20 05:58:32,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:58:32,971 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2021-11-20 05:58:32,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 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) [2021-11-20 05:58:32,971 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2021-11-20 05:58:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 05:58:32,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:32,972 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:32,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-20 05:58:33,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:33,172 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1126331370, now seen corresponding path program 6 times [2021-11-20 05:58:33,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:58:33,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596353725] [2021-11-20 05:58:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:33,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:58:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-20 05:58:33,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:58:33,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596353725] [2021-11-20 05:58:33,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596353725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:58:33,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820778403] [2021-11-20 05:58:33,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:58:33,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:33,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:58:33,677 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:58:33,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 05:58:33,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-20 05:58:33,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:58:33,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:58:33,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-20 05:58:34,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:58:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-20 05:58:35,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820778403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:58:35,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:58:35,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 43 [2021-11-20 05:58:35,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231812949] [2021-11-20 05:58:35,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:58:35,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-20 05:58:35,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:58:35,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-20 05:58:35,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1422, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 05:58:35,113 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 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) [2021-11-20 05:58:35,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:58:35,621 INFO L93 Difference]: Finished difference Result 202 states and 246 transitions. [2021-11-20 05:58:35,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 05:58:35,621 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 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 70 [2021-11-20 05:58:35,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:58:35,622 INFO L225 Difference]: With dead ends: 202 [2021-11-20 05:58:35,622 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 05:58:35,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=568, Invalid=1882, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 05:58:35,624 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 287 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:35,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 89 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:58:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 05:58:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 102. [2021-11-20 05:58:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.2277227722772277) internal successors, (124), 101 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2021-11-20 05:58:35,640 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 70 [2021-11-20 05:58:35,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:58:35,640 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2021-11-20 05:58:35,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 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) [2021-11-20 05:58:35,641 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2021-11-20 05:58:35,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 05:58:35,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:35,642 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:35,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 05:58:35,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 05:58:35,863 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:35,864 INFO L85 PathProgramCache]: Analyzing trace with hash -29093964, now seen corresponding path program 7 times [2021-11-20 05:58:35,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:58:35,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165597471] [2021-11-20 05:58:35,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:35,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:58:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:58:36,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:58:36,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165597471] [2021-11-20 05:58:36,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165597471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:58:36,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550050100] [2021-11-20 05:58:36,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:58:36,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:36,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:58:36,804 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:58:36,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 05:58:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:36,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 05:58:36,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:37,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 05:58:37,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-20 05:58:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:58:37,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:58:37,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2021-11-20 05:58:37,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-20 05:58:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:58:37,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550050100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:58:37,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:58:37,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15, 15] total 41 [2021-11-20 05:58:37,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622056903] [2021-11-20 05:58:37,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:58:37,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 05:58:37,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:58:37,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 05:58:37,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1494, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 05:58:37,909 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:58:56,684 INFO L93 Difference]: Finished difference Result 905 states and 1230 transitions. [2021-11-20 05:58:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-11-20 05:58:56,687 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 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 72 [2021-11-20 05:58:56,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:58:56,693 INFO L225 Difference]: With dead ends: 905 [2021-11-20 05:58:56,693 INFO L226 Difference]: Without dead ends: 903 [2021-11-20 05:58:56,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42062 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=5932, Invalid=96788, Unknown=0, NotChecked=0, Total=102720 [2021-11-20 05:58:56,706 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 3295 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 2576 mSolverCounterSat, 2853 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3295 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 5429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2853 IncrementalHoareTripleChecker+Valid, 2576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:56,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3295 Valid, 474 Invalid, 5429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2853 Valid, 2576 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 05:58:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-11-20 05:58:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 118. [2021-11-20 05:58:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 117 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 145 transitions. [2021-11-20 05:58:56,746 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 145 transitions. Word has length 72 [2021-11-20 05:58:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:58:56,747 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 145 transitions. [2021-11-20 05:58:56,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 145 transitions. [2021-11-20 05:58:56,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 05:58:56,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:56,749 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:56,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 05:58:56,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 05:58:56,959 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:56,960 INFO L85 PathProgramCache]: Analyzing trace with hash -803080396, now seen corresponding path program 3 times [2021-11-20 05:58:56,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:58:56,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438652233] [2021-11-20 05:58:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:56,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:58:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:58:58,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:58:58,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438652233] [2021-11-20 05:58:58,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438652233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:58:58,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674009668] [2021-11-20 05:58:58,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:58:58,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:58,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:58:58,458 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:58:58,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 05:58:58,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-20 05:58:58,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:58:58,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 05:58:58,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:59,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:59,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 05:58:59,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:58:59,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-11-20 05:58:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 05:58:59,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:59:00,070 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-20 05:59:00,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 05:59:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:59:00,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674009668] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:59:00,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:59:00,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 16] total 51 [2021-11-20 05:59:00,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144421582] [2021-11-20 05:59:00,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:59:00,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 05:59:00,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:00,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 05:59:00,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2325, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 05:59:00,262 INFO L87 Difference]: Start difference. First operand 118 states and 145 transitions. Second operand has 51 states, 51 states have (on average 3.196078431372549) internal successors, (163), 51 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:59:13,898 INFO L93 Difference]: Finished difference Result 1202 states and 1625 transitions. [2021-11-20 05:59:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-11-20 05:59:13,899 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.196078431372549) internal successors, (163), 51 states have internal predecessors, (163), 0 states have call successors, (0), 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 72 [2021-11-20 05:59:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:59:13,907 INFO L225 Difference]: With dead ends: 1202 [2021-11-20 05:59:13,908 INFO L226 Difference]: Without dead ends: 1200 [2021-11-20 05:59:13,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20074 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=4033, Invalid=52373, Unknown=0, NotChecked=0, Total=56406 [2021-11-20 05:59:13,914 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 2930 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 2485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2930 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 5456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2485 IncrementalHoareTripleChecker+Valid, 2971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:59:13,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2930 Valid, 725 Invalid, 5456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2485 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 05:59:13,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-11-20 05:59:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 126. [2021-11-20 05:59:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.24) internal successors, (155), 125 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 155 transitions. [2021-11-20 05:59:13,987 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 155 transitions. Word has length 72 [2021-11-20 05:59:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:59:13,988 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 155 transitions. [2021-11-20 05:59:13,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.196078431372549) internal successors, (163), 51 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:13,988 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 155 transitions. [2021-11-20 05:59:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 05:59:13,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:59:13,989 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:14,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 05:59:14,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:14,204 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:59:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:14,205 INFO L85 PathProgramCache]: Analyzing trace with hash 578767658, now seen corresponding path program 8 times [2021-11-20 05:59:14,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:14,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859184900] [2021-11-20 05:59:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:14,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:59:15,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:15,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859184900] [2021-11-20 05:59:15,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859184900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:59:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304641821] [2021-11-20 05:59:15,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:59:15,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:15,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:59:15,303 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:59:15,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 05:59:15,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:59:15,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:59:15,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 05:59:15,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:59:16,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-20 05:59:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 195 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:59:16,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:59:16,384 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-20 05:59:16,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 05:59:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 05:59:16,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304641821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:59:16,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:59:16,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20, 17] total 48 [2021-11-20 05:59:16,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032365200] [2021-11-20 05:59:16,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:59:16,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 05:59:16,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:16,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 05:59:16,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2083, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 05:59:16,490 INFO L87 Difference]: Start difference. First operand 126 states and 155 transitions. Second operand has 48 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:59:34,632 INFO L93 Difference]: Finished difference Result 1748 states and 2393 transitions. [2021-11-20 05:59:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2021-11-20 05:59:34,633 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 0 states have call successors, (0), 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 76 [2021-11-20 05:59:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:59:34,640 INFO L225 Difference]: With dead ends: 1748 [2021-11-20 05:59:34,641 INFO L226 Difference]: Without dead ends: 1746 [2021-11-20 05:59:34,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38979 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=7424, Invalid=89608, Unknown=0, NotChecked=0, Total=97032 [2021-11-20 05:59:34,648 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 4741 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 3913 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4741 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 6510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3913 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:59:34,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4741 Valid, 390 Invalid, 6510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3913 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 05:59:34,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-11-20 05:59:34,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 110. [2021-11-20 05:59:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 109 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:34,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2021-11-20 05:59:34,689 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 76 [2021-11-20 05:59:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:59:34,690 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2021-11-20 05:59:34,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2021-11-20 05:59:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 05:59:34,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:59:34,691 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:34,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 05:59:34,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 05:59:34,895 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:59:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:34,896 INFO L85 PathProgramCache]: Analyzing trace with hash -148644960, now seen corresponding path program 9 times [2021-11-20 05:59:34,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:34,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160334640] [2021-11-20 05:59:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:34,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 99 proven. 93 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 05:59:35,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:35,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160334640] [2021-11-20 05:59:35,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160334640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:59:35,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111938318] [2021-11-20 05:59:35,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:59:35,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:35,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:59:35,139 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:59:35,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 05:59:35,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-20 05:59:35,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:59:35,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 05:59:35,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:59:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 05:59:36,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:59:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 05:59:36,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111938318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:59:36,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:59:36,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-11-20 05:59:36,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840626704] [2021-11-20 05:59:36,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:59:36,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 05:59:36,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:36,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 05:59:36,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-11-20 05:59:36,345 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:36,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:59:36,851 INFO L93 Difference]: Finished difference Result 301 states and 368 transitions. [2021-11-20 05:59:36,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 05:59:36,852 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-20 05:59:36,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:59:36,853 INFO L225 Difference]: With dead ends: 301 [2021-11-20 05:59:36,854 INFO L226 Difference]: Without dead ends: 163 [2021-11-20 05:59:36,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=466, Invalid=1514, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 05:59:36,855 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 448 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:59:36,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 128 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:59:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-20 05:59:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 112. [2021-11-20 05:59:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 111 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2021-11-20 05:59:36,890 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 80 [2021-11-20 05:59:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:59:36,890 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2021-11-20 05:59:36,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2021-11-20 05:59:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 05:59:36,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:59:36,892 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:36,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 05:59:37,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 05:59:37,095 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:59:37,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:37,096 INFO L85 PathProgramCache]: Analyzing trace with hash 497611198, now seen corresponding path program 10 times [2021-11-20 05:59:37,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:37,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635811568] [2021-11-20 05:59:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:37,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 49 proven. 66 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-20 05:59:37,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:37,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635811568] [2021-11-20 05:59:37,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635811568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:59:37,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668065684] [2021-11-20 05:59:37,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:59:37,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:37,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:59:37,585 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:59:37,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 05:59:37,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:59:37,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:59:37,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:59:37,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:59:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 128 proven. 34 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 05:59:38,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:59:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 128 proven. 34 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 05:59:39,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668065684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:59:39,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:59:39,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 18] total 51 [2021-11-20 05:59:39,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929496571] [2021-11-20 05:59:39,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:59:39,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 05:59:39,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:39,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 05:59:39,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=2058, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 05:59:39,437 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand has 51 states, 51 states have (on average 3.4705882352941178) internal successors, (177), 51 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:40,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:59:40,722 INFO L93 Difference]: Finished difference Result 186 states and 223 transitions. [2021-11-20 05:59:40,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 05:59:40,723 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.4705882352941178) internal successors, (177), 51 states have internal predecessors, (177), 0 states have call successors, (0), 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 82 [2021-11-20 05:59:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:59:40,724 INFO L225 Difference]: With dead ends: 186 [2021-11-20 05:59:40,724 INFO L226 Difference]: Without dead ends: 149 [2021-11-20 05:59:40,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=832, Invalid=3998, Unknown=0, NotChecked=0, Total=4830 [2021-11-20 05:59:40,725 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 327 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:59:40,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 220 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:59:40,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-20 05:59:40,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 122. [2021-11-20 05:59:40,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.2231404958677685) internal successors, (148), 121 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 148 transitions. [2021-11-20 05:59:40,758 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 148 transitions. Word has length 82 [2021-11-20 05:59:40,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:59:40,758 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 148 transitions. [2021-11-20 05:59:40,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.4705882352941178) internal successors, (177), 51 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 148 transitions. [2021-11-20 05:59:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 05:59:40,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:59:40,760 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:40,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 05:59:40,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:40,987 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:59:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash 109214196, now seen corresponding path program 11 times [2021-11-20 05:59:40,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:40,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163239716] [2021-11-20 05:59:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:40,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 39 proven. 97 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-20 05:59:41,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:41,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163239716] [2021-11-20 05:59:41,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163239716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:59:41,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537525050] [2021-11-20 05:59:41,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:59:41,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:41,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:59:41,728 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:59:41,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 05:59:42,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-20 05:59:42,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:59:42,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:59:42,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:59:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 55 proven. 81 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-20 05:59:43,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:59:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 55 proven. 81 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-20 05:59:44,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537525050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:59:44,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:59:44,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 52 [2021-11-20 05:59:44,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994364345] [2021-11-20 05:59:44,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:59:44,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-20 05:59:44,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:44,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-20 05:59:44,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=2105, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 05:59:44,037 INFO L87 Difference]: Start difference. First operand 122 states and 148 transitions. Second operand has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:44,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:59:44,680 INFO L93 Difference]: Finished difference Result 242 states and 294 transitions. [2021-11-20 05:59:44,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 05:59:44,681 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-20 05:59:44,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:59:44,684 INFO L225 Difference]: With dead ends: 242 [2021-11-20 05:59:44,684 INFO L226 Difference]: Without dead ends: 138 [2021-11-20 05:59:44,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=804, Invalid=2736, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 05:59:44,689 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 453 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:59:44,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 95 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:59:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-20 05:59:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 124. [2021-11-20 05:59:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.2195121951219512) internal successors, (150), 123 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 150 transitions. [2021-11-20 05:59:44,739 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 150 transitions. Word has length 87 [2021-11-20 05:59:44,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:59:44,740 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 150 transitions. [2021-11-20 05:59:44,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 150 transitions. [2021-11-20 05:59:44,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 05:59:44,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:59:44,741 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:44,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 05:59:44,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:44,947 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:59:44,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:44,948 INFO L85 PathProgramCache]: Analyzing trace with hash -157555178, now seen corresponding path program 12 times [2021-11-20 05:59:44,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:44,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373190917] [2021-11-20 05:59:44,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:44,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:59:46,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:59:46,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373190917] [2021-11-20 05:59:46,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373190917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:59:46,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991870687] [2021-11-20 05:59:46,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:59:46,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:59:46,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:59:46,793 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:59:46,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 05:59:47,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-20 05:59:47,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:59:47,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 05:59:47,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:59:48,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 05:59:50,803 INFO L354 Elim1Store]: treesize reduction 24, result has 54.7 percent of original size [2021-11-20 05:59:50,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 115 [2021-11-20 05:59:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 120 proven. 147 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:59:51,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:59:52,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-11-20 05:59:52,659 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-20 05:59:52,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 75 [2021-11-20 05:59:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 112 proven. 71 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 05:59:53,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991870687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:59:53,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:59:53,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 23] total 80 [2021-11-20 05:59:53,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577902147] [2021-11-20 05:59:53,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:59:53,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-20 05:59:53,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:59:53,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-20 05:59:53,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=5693, Unknown=0, NotChecked=0, Total=6320 [2021-11-20 05:59:53,767 INFO L87 Difference]: Start difference. First operand 124 states and 150 transitions. Second operand has 80 states, 80 states have (on average 2.95) internal successors, (236), 80 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:59:57,909 INFO L93 Difference]: Finished difference Result 195 states and 230 transitions. [2021-11-20 05:59:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-20 05:59:57,910 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.95) internal successors, (236), 80 states have internal predecessors, (236), 0 states have call successors, (0), 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 89 [2021-11-20 05:59:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:59:57,911 INFO L225 Difference]: With dead ends: 195 [2021-11-20 05:59:57,911 INFO L226 Difference]: Without dead ends: 155 [2021-11-20 05:59:57,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4269 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1712, Invalid=14038, Unknown=0, NotChecked=0, Total=15750 [2021-11-20 05:59:57,912 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 256 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 701 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:59:57,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 799 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1110 Invalid, 0 Unknown, 701 Unchecked, 0.7s Time] [2021-11-20 05:59:57,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-20 05:59:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 122. [2021-11-20 05:59:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 121 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2021-11-20 05:59:57,958 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 89 [2021-11-20 05:59:57,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:59:57,958 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2021-11-20 05:59:57,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.95) internal successors, (236), 80 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:57,958 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2021-11-20 05:59:57,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 05:59:57,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:59:57,959 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:57,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 05:59:58,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 05:59:58,165 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:59:58,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:58,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2111458710, now seen corresponding path program 4 times [2021-11-20 05:59:58,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:59:58,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187004728] [2021-11-20 05:59:58,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:58,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:59:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:00:00,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:00,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187004728] [2021-11-20 06:00:00,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187004728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:00,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923227650] [2021-11-20 06:00:00,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:00:00,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:00,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:00,423 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:00,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 06:00:00,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:00:00,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:00:00,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 06:00:00,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:00,944 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 06:00:00,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 06:00:01,701 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:00:01,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 28 [2021-11-20 06:00:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 06:00:01,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:00:01,967 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-20 06:00:01,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 06:00:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 06:00:02,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923227650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:00:02,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:00:02,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 20, 19] total 53 [2021-11-20 06:00:02,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198192983] [2021-11-20 06:00:02,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:00:02,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-20 06:00:02,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:02,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-20 06:00:02,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2533, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 06:00:02,074 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand has 53 states, 53 states have (on average 3.188679245283019) internal successors, (169), 53 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:55,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:55,684 INFO L93 Difference]: Finished difference Result 2262 states and 3123 transitions. [2021-11-20 06:00:55,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 609 states. [2021-11-20 06:00:55,685 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.188679245283019) internal successors, (169), 53 states have internal predecessors, (169), 0 states have call successors, (0), 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 89 [2021-11-20 06:00:55,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:55,695 INFO L225 Difference]: With dead ends: 2262 [2021-11-20 06:00:55,695 INFO L226 Difference]: Without dead ends: 2260 [2021-11-20 06:00:55,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 162 SyntacticMatches, 7 SemanticMatches, 648 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186310 ImplicationChecksByTransitivity, 45.4s TimeCoverageRelationStatistics Valid=16540, Invalid=405310, Unknown=0, NotChecked=0, Total=421850 [2021-11-20 06:00:55,717 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 11235 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 4015 mSolverCounterSat, 9219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11235 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 13234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9219 IncrementalHoareTripleChecker+Valid, 4015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:55,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11235 Valid, 679 Invalid, 13234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9219 Valid, 4015 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2021-11-20 06:00:55,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-11-20 06:00:55,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 140. [2021-11-20 06:00:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.2158273381294964) internal successors, (169), 139 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 169 transitions. [2021-11-20 06:00:55,808 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 169 transitions. Word has length 89 [2021-11-20 06:00:55,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:55,808 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 169 transitions. [2021-11-20 06:00:55,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.188679245283019) internal successors, (169), 53 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:55,809 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 169 transitions. [2021-11-20 06:00:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:00:55,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:55,810 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:00:55,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 06:00:56,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:00:56,011 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash 430089614, now seen corresponding path program 1 times [2021-11-20 06:00:56,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:56,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437853989] [2021-11-20 06:00:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:56,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:00:57,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:57,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437853989] [2021-11-20 06:00:57,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437853989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:57,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339469911] [2021-11-20 06:00:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:57,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:57,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:57,581 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:57,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 06:00:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:57,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-20 06:00:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:58,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-20 06:00:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:00:58,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:00:59,132 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-20 06:00:59,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 06:00:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 06:00:59,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339469911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:00:59,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:00:59,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 24, 20] total 57 [2021-11-20 06:00:59,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832361545] [2021-11-20 06:00:59,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:00:59,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-20 06:00:59,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:59,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-20 06:00:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2982, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 06:00:59,239 INFO L87 Difference]: Start difference. First operand 140 states and 169 transitions. Second operand has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 57 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:02:37,552 INFO L93 Difference]: Finished difference Result 6326 states and 8873 transitions. [2021-11-20 06:02:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 918 states. [2021-11-20 06:02:37,553 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 57 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-20 06:02:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:02:37,580 INFO L225 Difference]: With dead ends: 6326 [2021-11-20 06:02:37,581 INFO L226 Difference]: Without dead ends: 6324 [2021-11-20 06:02:37,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1123 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 958 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428056 ImplicationChecksByTransitivity, 81.7s TimeCoverageRelationStatistics Valid=44640, Invalid=876000, Unknown=0, NotChecked=0, Total=920640 [2021-11-20 06:02:37,633 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 18493 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 4181 mSolverCounterSat, 15708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18493 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 19889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15708 IncrementalHoareTripleChecker+Valid, 4181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:02:37,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18493 Valid, 930 Invalid, 19889 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15708 Valid, 4181 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2021-11-20 06:02:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6324 states. [2021-11-20 06:02:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6324 to 130. [2021-11-20 06:02:37,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.2015503875968991) internal successors, (155), 129 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 155 transitions. [2021-11-20 06:02:37,748 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 155 transitions. Word has length 93 [2021-11-20 06:02:37,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:02:37,748 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 155 transitions. [2021-11-20 06:02:37,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 57 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:37,749 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 155 transitions. [2021-11-20 06:02:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 06:02:37,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:02:37,749 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:37,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-20 06:02:37,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:37,963 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:02:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:37,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1281943678, now seen corresponding path program 5 times [2021-11-20 06:02:37,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:37,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829246358] [2021-11-20 06:02:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:37,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 163 proven. 137 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-20 06:02:38,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:38,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829246358] [2021-11-20 06:02:38,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829246358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:38,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454222900] [2021-11-20 06:02:38,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:02:38,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:38,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:38,300 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:38,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 06:02:39,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-20 06:02:39,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:02:39,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:02:39,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 200 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-20 06:02:39,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:02:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 200 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-20 06:02:39,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454222900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:02:39,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:02:39,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2021-11-20 06:02:39,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259792421] [2021-11-20 06:02:39,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:02:39,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 06:02:39,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:39,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 06:02:39,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 06:02:39,778 INFO L87 Difference]: Start difference. First operand 130 states and 155 transitions. Second operand has 38 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:02:40,482 INFO L93 Difference]: Finished difference Result 330 states and 398 transitions. [2021-11-20 06:02:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:02:40,482 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 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 97 [2021-11-20 06:02:40,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:02:40,484 INFO L225 Difference]: With dead ends: 330 [2021-11-20 06:02:40,484 INFO L226 Difference]: Without dead ends: 176 [2021-11-20 06:02:40,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=658, Invalid=2204, Unknown=0, NotChecked=0, Total=2862 [2021-11-20 06:02:40,485 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 506 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:02:40,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 168 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:02:40,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-20 06:02:40,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 132. [2021-11-20 06:02:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1984732824427482) internal successors, (157), 131 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:40,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2021-11-20 06:02:40,565 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 97 [2021-11-20 06:02:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:02:40,565 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2021-11-20 06:02:40,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:40,566 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2021-11-20 06:02:40,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 06:02:40,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:02:40,567 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:40,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-20 06:02:40,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 06:02:40,774 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:02:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1513701668, now seen corresponding path program 6 times [2021-11-20 06:02:40,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:40,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239281490] [2021-11-20 06:02:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:40,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 81 proven. 95 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-20 06:02:41,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:41,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239281490] [2021-11-20 06:02:41,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239281490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:41,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132022789] [2021-11-20 06:02:41,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:02:41,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:41,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:41,386 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:41,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 06:02:42,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-20 06:02:42,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:02:42,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:02:42,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 100 proven. 76 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-20 06:02:43,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:02:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 121 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-20 06:02:45,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132022789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:02:45,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:02:45,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 58 [2021-11-20 06:02:45,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917388745] [2021-11-20 06:02:45,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:02:45,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-20 06:02:45,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:45,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-20 06:02:45,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=2555, Unknown=0, NotChecked=0, Total=3306 [2021-11-20 06:02:45,034 INFO L87 Difference]: Start difference. First operand 132 states and 157 transitions. Second operand has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:46,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:02:46,035 INFO L93 Difference]: Finished difference Result 207 states and 245 transitions. [2021-11-20 06:02:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:02:46,035 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-20 06:02:46,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:02:46,036 INFO L225 Difference]: With dead ends: 207 [2021-11-20 06:02:46,036 INFO L226 Difference]: Without dead ends: 162 [2021-11-20 06:02:46,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1343, Invalid=4059, Unknown=0, NotChecked=0, Total=5402 [2021-11-20 06:02:46,038 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 565 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:02:46,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 235 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:02:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-20 06:02:46,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-11-20 06:02:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1984732824427482) internal successors, (157), 131 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2021-11-20 06:02:46,126 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 99 [2021-11-20 06:02:46,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:02:46,126 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2021-11-20 06:02:46,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:46,127 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2021-11-20 06:02:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-20 06:02:46,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:02:46,128 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:46,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 06:02:46,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-20 06:02:46,343 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:02:46,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:46,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1256942630, now seen corresponding path program 13 times [2021-11-20 06:02:46,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:46,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625225419] [2021-11-20 06:02:46,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:46,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 60 proven. 142 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-20 06:02:46,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:46,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625225419] [2021-11-20 06:02:46,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625225419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:46,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159634787] [2021-11-20 06:02:46,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:02:46,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:46,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:46,943 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:46,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 06:02:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:02:47,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 81 proven. 121 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-20 06:02:47,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:02:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 81 proven. 121 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-20 06:02:48,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159634787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:02:48,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:02:48,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 61 [2021-11-20 06:02:48,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166252291] [2021-11-20 06:02:48,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:02:48,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-20 06:02:48,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:48,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-20 06:02:48,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=2897, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 06:02:48,887 INFO L87 Difference]: Start difference. First operand 132 states and 157 transitions. Second operand has 61 states, 61 states have (on average 2.8360655737704916) internal successors, (173), 61 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:49,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:02:49,550 INFO L93 Difference]: Finished difference Result 254 states and 304 transitions. [2021-11-20 06:02:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 06:02:49,550 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.8360655737704916) internal successors, (173), 61 states have internal predecessors, (173), 0 states have call successors, (0), 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 104 [2021-11-20 06:02:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:02:49,551 INFO L225 Difference]: With dead ends: 254 [2021-11-20 06:02:49,551 INFO L226 Difference]: Without dead ends: 146 [2021-11-20 06:02:49,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1966 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1068, Invalid=3624, Unknown=0, NotChecked=0, Total=4692 [2021-11-20 06:02:49,552 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 412 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:02:49,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 114 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:02:49,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-20 06:02:49,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2021-11-20 06:02:49,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1954887218045114) internal successors, (159), 133 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 159 transitions. [2021-11-20 06:02:49,599 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 159 transitions. Word has length 104 [2021-11-20 06:02:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:02:49,599 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 159 transitions. [2021-11-20 06:02:49,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.8360655737704916) internal successors, (173), 61 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 159 transitions. [2021-11-20 06:02:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:02:49,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:02:49,600 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 10, 10, 10, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:49,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 06:02:49,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:49,803 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:02:49,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:49,804 INFO L85 PathProgramCache]: Analyzing trace with hash 381126724, now seen corresponding path program 14 times [2021-11-20 06:02:49,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:49,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307757818] [2021-11-20 06:02:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:49,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:02:51,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:51,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307757818] [2021-11-20 06:02:51,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307757818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:51,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429452908] [2021-11-20 06:02:51,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:02:51,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:51,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:51,985 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:51,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69554c2c-33ef-4e4c-a0ca-15f6f0a30873/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 06:02:52,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:02:52,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:02:52,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 06:02:52,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:52,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 06:02:53,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-20 06:02:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 06:02:53,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:02:53,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2021-11-20 06:02:53,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-20 06:02:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-20 06:02:54,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429452908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:02:54,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:02:54,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21, 21] total 68 [2021-11-20 06:02:54,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654378131] [2021-11-20 06:02:54,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:02:54,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-20 06:02:54,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:54,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-20 06:02:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=4331, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 06:02:54,141 INFO L87 Difference]: Start difference. First operand 134 states and 159 transitions. Second operand has 68 states, 68 states have (on average 3.4411764705882355) internal successors, (234), 68 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)