./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL --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 2638891780f697dd700286595ba75a607e61cda7473ecc330660e8dbb3e9ba64 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:23:27,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:23:27,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:23:27,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:23:27,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:23:27,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:23:27,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:23:27,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:23:27,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:23:27,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:23:27,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:23:27,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:23:27,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:23:27,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:23:27,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:23:27,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:23:27,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:23:27,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:23:27,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:23:27,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:23:27,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:23:27,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:23:27,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:23:27,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:23:27,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:23:27,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:23:27,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:23:27,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:23:27,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:23:27,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:23:27,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:23:27,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:23:27,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:23:27,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:23:27,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:23:27,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:23:27,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:23:27,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:23:27,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:23:27,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:23:27,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:23:27,512 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:23:27,539 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:23:27,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:23:27,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:23:27,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:23:27,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:23:27,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:23:27,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:23:27,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:23:27,547 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:23:27,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:23:27,548 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:23:27,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:23:27,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:23:27,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:23:27,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:23:27,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:23:27,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:23:27,550 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:23:27,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:23:27,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:23:27,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:23:27,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:23:27,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:23:27,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:23:27,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:23:27,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:23:27,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:23:27,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:23:27,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:23:27,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:23:27,555 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:23:27,555 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:23:27,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:23:27,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:23:27,556 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_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2638891780f697dd700286595ba75a607e61cda7473ecc330660e8dbb3e9ba64 [2021-11-19 05:23:27,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:23:27,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:23:27,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:23:27,939 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:23:27,940 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:23:27,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2021-11-19 05:23:28,013 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/data/12a37b885/fe4a7df19b2547be8f83502067516211/FLAG46b23bf32 [2021-11-19 05:23:28,441 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:23:28,442 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2021-11-19 05:23:28,447 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/data/12a37b885/fe4a7df19b2547be8f83502067516211/FLAG46b23bf32 [2021-11-19 05:23:28,829 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/data/12a37b885/fe4a7df19b2547be8f83502067516211 [2021-11-19 05:23:28,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:23:28,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:23:28,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:23:28,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:23:28,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:23:28,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:23:28" (1/1) ... [2021-11-19 05:23:28,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39087aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:28, skipping insertion in model container [2021-11-19 05:23:28,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:23:28" (1/1) ... [2021-11-19 05:23:28,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:23:28,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:23:29,044 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_fd5e9aa5-450c-4147-9949-bce5724552b5/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c[324,337] [2021-11-19 05:23:29,064 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:23:29,072 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:23:29,086 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_fd5e9aa5-450c-4147-9949-bce5724552b5/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c[324,337] [2021-11-19 05:23:29,096 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:23:29,112 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:23:29,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:29 WrapperNode [2021-11-19 05:23:29,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:23:29,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:23:29,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:23:29,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:23:29,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:29" (1/1) ... [2021-11-19 05:23:29,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:29" (1/1) ... [2021-11-19 05:23:29,153 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2021-11-19 05:23:29,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:23:29,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:23:29,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:23:29,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:23:29,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:29" (1/1) ... [2021-11-19 05:23:29,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:29" (1/1) ... [2021-11-19 05:23:29,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:29" (1/1) ... [2021-11-19 05:23:29,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:29" (1/1) ... [2021-11-19 05:23:29,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:29" (1/1) ... [2021-11-19 05:23:29,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:29" (1/1) ... [2021-11-19 05:23:29,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:29" (1/1) ... [2021-11-19 05:23:29,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:23:29,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:23:29,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:23:29,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:23:29,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:29" (1/1) ... [2021-11-19 05:23:29,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:23:29,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:23:29,239 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:23:29,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:23:29,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:23:29,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:23:29,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:23:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:23:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:23:29,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:23:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:23:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:23:29,385 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:23:29,387 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:23:29,622 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:23:29,628 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:23:29,628 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 05:23:29,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:23:29 BoogieIcfgContainer [2021-11-19 05:23:29,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:23:29,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:23:29,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:23:29,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:23:29,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:23:28" (1/3) ... [2021-11-19 05:23:29,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461aa623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:23:29, skipping insertion in model container [2021-11-19 05:23:29,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:29" (2/3) ... [2021-11-19 05:23:29,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461aa623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:23:29, skipping insertion in model container [2021-11-19 05:23:29,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:23:29" (3/3) ... [2021-11-19 05:23:29,656 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2021-11-19 05:23:29,662 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:23:29,662 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:23:29,770 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:23:29,778 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 [2021-11-19 05:23:29,778 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:23:29,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 05:23:29,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:23:29,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:23:29,821 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:23:29,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:23:29,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2044605464, now seen corresponding path program 1 times [2021-11-19 05:23:29,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:23:29,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717796795] [2021-11-19 05:23:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:23:29,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:23:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:23:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:23:30,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:23:30,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717796795] [2021-11-19 05:23:30,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717796795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:23:30,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:23:30,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:23:30,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886872264] [2021-11-19 05:23:30,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:23:30,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:23:30,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:23:30,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:23:30,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:23:30,064 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:30,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:23:30,110 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2021-11-19 05:23:30,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:23:30,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-19 05:23:30,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:23:30,123 INFO L225 Difference]: With dead ends: 42 [2021-11-19 05:23:30,123 INFO L226 Difference]: Without dead ends: 20 [2021-11-19 05:23:30,127 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 [2021-11-19 05:23:30,131 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:23:30,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:23:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-19 05:23:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-19 05:23:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-11-19 05:23:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-19 05:23:30,171 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-19 05:23:30,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:23:30,172 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-19 05:23:30,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-19 05:23:30,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 05:23:30,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:23:30,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:23:30,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:23:30,175 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:23:30,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:23:30,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1280243605, now seen corresponding path program 1 times [2021-11-19 05:23:30,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:23:30,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110168867] [2021-11-19 05:23:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:23:30,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:23:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:23:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:23:30,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:23:30,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110168867] [2021-11-19 05:23:30,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110168867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:23:30,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:23:30,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:23:30,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984294436] [2021-11-19 05:23:30,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:23:30,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:23:30,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:23:30,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:23:30,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:23:30,275 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2021-11-19 05:23:30,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:23:30,352 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2021-11-19 05:23:30,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:23:30,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2021-11-19 05:23:30,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:23:30,355 INFO L225 Difference]: With dead ends: 38 [2021-11-19 05:23:30,355 INFO L226 Difference]: Without dead ends: 26 [2021-11-19 05:23:30,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:23:30,358 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:23:30,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:23:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-19 05:23:30,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-11-19 05:23:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2021-11-19 05:23:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-19 05:23:30,371 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2021-11-19 05:23:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:23:30,374 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-19 05:23:30,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2021-11-19 05:23:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-19 05:23:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 05:23:30,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:23:30,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:23:30,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:23:30,380 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:23:30,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:23:30,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1442235305, now seen corresponding path program 1 times [2021-11-19 05:23:30,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:23:30,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271774157] [2021-11-19 05:23:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:23:30,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:23:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:23:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:23:30,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:23:30,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271774157] [2021-11-19 05:23:30,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271774157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:23:30,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:23:30,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:23:30,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835167093] [2021-11-19 05:23:30,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:23:30,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:23:30,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:23:30,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:23:30,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:23:30,492 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:30,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:23:30,518 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-11-19 05:23:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:23:30,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-19 05:23:30,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:23:30,519 INFO L225 Difference]: With dead ends: 34 [2021-11-19 05:23:30,520 INFO L226 Difference]: Without dead ends: 21 [2021-11-19 05:23:30,520 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 [2021-11-19 05:23:30,522 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:23:30,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:23:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-19 05:23:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-19 05:23:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2021-11-19 05:23:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-19 05:23:30,528 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2021-11-19 05:23:30,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:23:30,528 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-19 05:23:30,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:30,529 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-19 05:23:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 05:23:30,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:23:30,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:23:30,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 05:23:30,530 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:23:30,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:23:30,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2093661559, now seen corresponding path program 1 times [2021-11-19 05:23:30,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:23:30,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356401502] [2021-11-19 05:23:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:23:30,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:23:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:23:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:23:30,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:23:30,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356401502] [2021-11-19 05:23:30,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356401502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:23:30,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391915329] [2021-11-19 05:23:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:23:30,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:23:30,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:23:30,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:23:30,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:23:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:23:30,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:23:30,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:23:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:23:30,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:23:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:23:31,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391915329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:23:31,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:23:31,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-19 05:23:31,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750623463] [2021-11-19 05:23:31,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:23:31,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:23:31,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:23:31,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:23:31,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:23:31,116 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:31,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:23:31,394 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2021-11-19 05:23:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:23:31,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-11-19 05:23:31,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:23:31,396 INFO L225 Difference]: With dead ends: 84 [2021-11-19 05:23:31,399 INFO L226 Difference]: Without dead ends: 68 [2021-11-19 05:23:31,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:23:31,403 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:23:31,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 86 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:23:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-19 05:23:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 37. [2021-11-19 05:23:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-11-19 05:23:31,425 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 16 [2021-11-19 05:23:31,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:23:31,425 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-11-19 05:23:31,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-11-19 05:23:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 05:23:31,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:23:31,428 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:23:31,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:23:31,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:23:31,645 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:23:31,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:23:31,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1674724175, now seen corresponding path program 1 times [2021-11-19 05:23:31,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:23:31,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234527779] [2021-11-19 05:23:31,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:23:31,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:23:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:23:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:23:31,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:23:31,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234527779] [2021-11-19 05:23:31,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234527779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:23:31,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484841996] [2021-11-19 05:23:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:23:31,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:23:31,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:23:31,771 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:23:31,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:23:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:23:31,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:23:31,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:23:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:23:32,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:23:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:23:32,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484841996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:23:32,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:23:32,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-11-19 05:23:32,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056719419] [2021-11-19 05:23:32,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:23:32,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 05:23:32,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:23:32,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 05:23:32,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:23:32,217 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-11-19 05:23:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:23:32,333 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2021-11-19 05:23:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:23:32,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 [2021-11-19 05:23:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:23:32,337 INFO L225 Difference]: With dead ends: 83 [2021-11-19 05:23:32,337 INFO L226 Difference]: Without dead ends: 57 [2021-11-19 05:23:32,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:23:32,340 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:23:32,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 80 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:23:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-19 05:23:32,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2021-11-19 05:23:32,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-11-19 05:23:32,364 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 25 [2021-11-19 05:23:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:23:32,364 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-11-19 05:23:32,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-11-19 05:23:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-11-19 05:23:32,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 05:23:32,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:23:32,366 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:23:32,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:23:32,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:23:32,584 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:23:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:23:32,585 INFO L85 PathProgramCache]: Analyzing trace with hash 674415525, now seen corresponding path program 2 times [2021-11-19 05:23:32,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:23:32,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310474961] [2021-11-19 05:23:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:23:32,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:23:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:23:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:23:32,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:23:32,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310474961] [2021-11-19 05:23:32,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310474961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:23:32,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422735615] [2021-11-19 05:23:32,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:23:32,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:23:32,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:23:32,866 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:23:32,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:23:32,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:23:32,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:23:32,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 05:23:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:23:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:23:33,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:23:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:23:33,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422735615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:23:33,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:23:33,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2021-11-19 05:23:33,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230063722] [2021-11-19 05:23:33,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:23:33,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-19 05:23:33,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:23:33,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-19 05:23:33,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 05:23:33,574 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:23:33,734 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2021-11-19 05:23:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 05:23:33,735 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-19 05:23:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:23:33,738 INFO L225 Difference]: With dead ends: 107 [2021-11-19 05:23:33,739 INFO L226 Difference]: Without dead ends: 81 [2021-11-19 05:23:33,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 05:23:33,743 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:23:33,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 64 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:23:33,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-19 05:23:33,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2021-11-19 05:23:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-11-19 05:23:33,766 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 37 [2021-11-19 05:23:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:23:33,767 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-11-19 05:23:33,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:33,767 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-11-19 05:23:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 05:23:33,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:23:33,772 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:23:33,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:23:33,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:23:33,998 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:23:33,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:23:33,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1755146125, now seen corresponding path program 3 times [2021-11-19 05:23:33,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:23:33,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480243162] [2021-11-19 05:23:33,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:23:33,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:23:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:23:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:23:34,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:23:34,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480243162] [2021-11-19 05:23:34,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480243162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:23:34,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81323695] [2021-11-19 05:23:34,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:23:34,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:23:34,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:23:34,487 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:23:34,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:23:34,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 05:23:34,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:23:34,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:23:34,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:23:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-19 05:23:34,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:23:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-19 05:23:35,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81323695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:23:35,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:23:35,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 33 [2021-11-19 05:23:35,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814662059] [2021-11-19 05:23:35,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:23:35,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 05:23:35,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:23:35,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 05:23:35,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=632, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 05:23:35,018 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:23:37,285 INFO L93 Difference]: Finished difference Result 317 states and 378 transitions. [2021-11-19 05:23:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-19 05:23:37,286 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-19 05:23:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:23:37,288 INFO L225 Difference]: With dead ends: 317 [2021-11-19 05:23:37,289 INFO L226 Difference]: Without dead ends: 291 [2021-11-19 05:23:37,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3510, Invalid=7410, Unknown=0, NotChecked=0, Total=10920 [2021-11-19 05:23:37,296 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 597 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:23:37,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 100 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:23:37,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-19 05:23:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 196. [2021-11-19 05:23:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 195 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 224 transitions. [2021-11-19 05:23:37,323 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 224 transitions. Word has length 61 [2021-11-19 05:23:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:23:37,324 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 224 transitions. [2021-11-19 05:23:37,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:37,324 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 224 transitions. [2021-11-19 05:23:37,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 05:23:37,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:23:37,326 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:23:37,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:23:37,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:23:37,554 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:23:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:23:37,555 INFO L85 PathProgramCache]: Analyzing trace with hash 842992325, now seen corresponding path program 1 times [2021-11-19 05:23:37,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:23:37,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739927147] [2021-11-19 05:23:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:23:37,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:23:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:23:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 05:23:38,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:23:38,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739927147] [2021-11-19 05:23:38,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739927147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:23:38,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713775392] [2021-11-19 05:23:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:23:38,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:23:38,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:23:38,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:23:38,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:23:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:23:38,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 05:23:38,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:23:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 05:23:38,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:23:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 05:23:40,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713775392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:23:40,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:23:40,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 80 [2021-11-19 05:23:40,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855983287] [2021-11-19 05:23:40,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:23:40,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-19 05:23:40,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:23:40,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-19 05:23:40,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2860, Invalid=3460, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 05:23:40,160 INFO L87 Difference]: Start difference. First operand 196 states and 224 transitions. Second operand has 80 states, 80 states have (on average 2.1375) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:23:40,452 INFO L93 Difference]: Finished difference Result 402 states and 485 transitions. [2021-11-19 05:23:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-19 05:23:40,453 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 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 [2021-11-19 05:23:40,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:23:40,457 INFO L225 Difference]: With dead ends: 402 [2021-11-19 05:23:40,457 INFO L226 Difference]: Without dead ends: 259 [2021-11-19 05:23:40,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2860, Invalid=3460, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 05:23:40,464 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:23:40,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 86 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:23:40,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-19 05:23:40,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 250. [2021-11-19 05:23:40,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.1164658634538152) internal successors, (278), 249 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:40,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 278 transitions. [2021-11-19 05:23:40,506 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 278 transitions. Word has length 72 [2021-11-19 05:23:40,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:23:40,508 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 278 transitions. [2021-11-19 05:23:40,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:40,508 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 278 transitions. [2021-11-19 05:23:40,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 05:23:40,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:23:40,516 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:23:40,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:23:40,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 05:23:40,742 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:23:40,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:23:40,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1201235067, now seen corresponding path program 2 times [2021-11-19 05:23:40,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:23:40,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5906475] [2021-11-19 05:23:40,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:23:40,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:23:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:23:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 05:23:42,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:23:42,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5906475] [2021-11-19 05:23:42,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5906475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:23:42,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121022386] [2021-11-19 05:23:42,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:23:42,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:23:42,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:23:42,402 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:23:42,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:23:42,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:23:42,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:23:42,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 05:23:42,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:23:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 05:23:44,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:23:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 05:23:47,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121022386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:23:47,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:23:47,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 161 [2021-11-19 05:23:47,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206420971] [2021-11-19 05:23:47,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:23:47,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2021-11-19 05:23:47,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:23:47,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2021-11-19 05:23:47,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11554, Invalid=14206, Unknown=0, NotChecked=0, Total=25760 [2021-11-19 05:23:47,856 INFO L87 Difference]: Start difference. First operand 250 states and 278 transitions. Second operand has 161 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 161 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:23:48,425 INFO L93 Difference]: Finished difference Result 510 states and 620 transitions. [2021-11-19 05:23:48,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-19 05:23:48,426 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 161 states have internal predecessors, (333), 0 states have call successors, (0), 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 126 [2021-11-19 05:23:48,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:23:48,429 INFO L225 Difference]: With dead ends: 510 [2021-11-19 05:23:48,429 INFO L226 Difference]: Without dead ends: 367 [2021-11-19 05:23:48,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11075 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=11554, Invalid=14206, Unknown=0, NotChecked=0, Total=25760 [2021-11-19 05:23:48,436 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 222 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:23:48,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 68 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:23:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-19 05:23:48,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 358. [2021-11-19 05:23:48,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.0812324929971988) internal successors, (386), 357 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 386 transitions. [2021-11-19 05:23:48,459 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 386 transitions. Word has length 126 [2021-11-19 05:23:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:23:48,459 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 386 transitions. [2021-11-19 05:23:48,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 161 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:23:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 386 transitions. [2021-11-19 05:23:48,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-19 05:23:48,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:23:48,463 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:23:48,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-19 05:23:48,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:23:48,678 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:23:48,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:23:48,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1368520089, now seen corresponding path program 3 times [2021-11-19 05:23:48,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:23:48,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582625052] [2021-11-19 05:23:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:23:48,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:23:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:23:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11249 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 05:23:53,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:23:53,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582625052] [2021-11-19 05:23:53,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582625052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:23:53,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957940797] [2021-11-19 05:23:53,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:23:53,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:23:53,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:23:53,326 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:23:53,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 05:23:53,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 05:23:53,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:23:53,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 05:23:53,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:23:54,869 INFO L354 Elim1Store]: treesize reduction 70, result has 27.1 percent of original size [2021-11-19 05:23:54,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 41 [2021-11-19 05:24:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11249 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11243 trivial. 0 not checked. [2021-11-19 05:24:07,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:24:09,181 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (not (= (select (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|)) (.cse1 (* |ULTIMATE.start_main_~i~0#1| 4))) (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) (select .cse0 (+ .cse1 4 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|)))) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (< (+ 2 |ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~n~0#1|))) is different from false [2021-11-19 05:24:12,201 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 31 [2021-11-19 05:24:12,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:24:12,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 50 treesize of output 71 [2021-11-19 05:24:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11249 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11243 trivial. 6 not checked. [2021-11-19 05:24:13,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957940797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:24:13,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:24:13,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 11, 11] total 126 [2021-11-19 05:24:13,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126350448] [2021-11-19 05:24:13,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:24:13,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-11-19 05:24:13,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:13,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-11-19 05:24:13,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6280, Invalid=9215, Unknown=9, NotChecked=246, Total=15750 [2021-11-19 05:24:13,148 INFO L87 Difference]: Start difference. First operand 358 states and 386 transitions. Second operand has 126 states, 126 states have (on average 2.111111111111111) internal successors, (266), 126 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:26:00,496 WARN L838 $PredicateComparison]: unable to prove that (and (<= 100000 |c_ULTIMATE.start_main_~n~0#1|) (= |c_ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (not (= (select (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|)) (.cse1 (* |ULTIMATE.start_main_~i~0#1| 4))) (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) (select .cse0 (+ .cse1 4 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|)))) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (< (+ 2 |ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~n~0#1|))) (not (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|))) is different from false [2021-11-19 05:26:01,119 WARN L838 $PredicateComparison]: unable to prove that (and (<= 100000 |c_ULTIMATE.start_main_~n~0#1|) (= |c_ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (not (= (select (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|)) (.cse1 (* |ULTIMATE.start_main_~i~0#1| 4))) (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) (select .cse0 (+ .cse1 4 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|)))) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (< (+ 2 |ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~n~0#1|))) (not (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|))) is different from false [2021-11-19 05:26:03,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:26:03,250 INFO L93 Difference]: Finished difference Result 527 states and 589 transitions. [2021-11-19 05:26:03,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-19 05:26:03,251 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.111111111111111) internal successors, (266), 126 states have internal predecessors, (266), 0 states have call successors, (0), 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 234 [2021-11-19 05:26:03,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:26:03,255 INFO L225 Difference]: With dead ends: 527 [2021-11-19 05:26:03,255 INFO L226 Difference]: Without dead ends: 384 [2021-11-19 05:26:03,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 450 SyntacticMatches, 1 SemanticMatches, 237 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 7796 ImplicationChecksByTransitivity, 130.7s TimeCoverageRelationStatistics Valid=19173, Invalid=36238, Unknown=61, NotChecked=1410, Total=56882 [2021-11-19 05:26:03,262 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 354 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:26:03,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 84 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 330 Invalid, 0 Unknown, 303 Unchecked, 0.6s Time] [2021-11-19 05:26:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-19 05:26:03,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 374. [2021-11-19 05:26:03,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 1.0884718498659518) internal successors, (406), 373 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:26:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 406 transitions. [2021-11-19 05:26:03,291 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 406 transitions. Word has length 234 [2021-11-19 05:26:03,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:26:03,291 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 406 transitions. [2021-11-19 05:26:03,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.111111111111111) internal successors, (266), 126 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:26:03,292 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 406 transitions. [2021-11-19 05:26:03,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-19 05:26:03,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:26:03,295 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:26:03,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:26:03,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 05:26:03,514 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:26:03,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:26:03,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1026877561, now seen corresponding path program 4 times [2021-11-19 05:26:03,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:26:03,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605001624] [2021-11-19 05:26:03,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:26:03,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:26:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11465 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 05:26:08,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:26:08,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605001624] [2021-11-19 05:26:08,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605001624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:26:08,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380186449] [2021-11-19 05:26:08,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:26:08,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:26:08,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:26:08,746 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:26:08,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 05:26:08,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:26:08,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:26:08,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 05:26:08,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:26:09,813 INFO L354 Elim1Store]: treesize reduction 140, result has 12.5 percent of original size [2021-11-19 05:26:09,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2021-11-19 05:26:10,067 INFO L354 Elim1Store]: treesize reduction 192, result has 18.6 percent of original size [2021-11-19 05:26:10,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 65 [2021-11-19 05:26:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11465 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 11449 trivial. 0 not checked. [2021-11-19 05:26:13,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:26:14,332 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_378| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_378| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (not (= (select (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|)) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_378| 4))) (store .cse0 (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| .cse1) (select .cse0 (+ 4 |c_ULTIMATE.start_main_~#vectorx~0#1.offset| .cse1)))) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)))) is different from false [2021-11-19 05:28:23,274 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 93 treesize of output 79 [2021-11-19 05:28:23,325 INFO L354 Elim1Store]: treesize reduction 115, result has 26.8 percent of original size [2021-11-19 05:28:23,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 241 treesize of output 190 [2021-11-19 05:28:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11465 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11449 trivial. 1 not checked. [2021-11-19 05:28:23,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380186449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:28:23,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:28:23,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 15, 15] total 134 [2021-11-19 05:28:23,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952196003] [2021-11-19 05:28:23,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:28:23,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2021-11-19 05:28:23,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:23,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-11-19 05:28:23,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6104, Invalid=11446, Unknown=10, NotChecked=262, Total=17822 [2021-11-19 05:28:23,882 INFO L87 Difference]: Start difference. First operand 374 states and 406 transitions. Second operand has 134 states, 134 states have (on average 2.037313432835821) internal successors, (273), 134 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:28:28,470 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_378| Int)) (or (not (= (select (let ((.cse0 (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|)) (.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store .cse2 (+ .cse3 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) (select .cse2 (+ .cse3 4 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|))))) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_378| 4))) (store .cse0 (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| .cse1) (select .cse0 (+ 4 |c_ULTIMATE.start_main_~#vectorx~0#1.offset| .cse1)))) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (< |v_ULTIMATE.start_main_~i~0#1_378| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_378| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_378| (+ |c_ULTIMATE.start_main_~pos~0#1| 1)) (not (= (select (let ((.cse4 (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|)) (.cse7 (* |c_ULTIMATE.start_main_~pos~0#1| 4))) (store .cse6 (+ .cse7 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) (select .cse6 (+ .cse7 4 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|))))) (.cse5 (* |v_ULTIMATE.start_main_~i~0#1_378| 4))) (store .cse4 (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| .cse5) (select .cse4 (+ 4 |c_ULTIMATE.start_main_~#vectorx~0#1.offset| .cse5)))) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|))))) is different from false [2021-11-19 05:28:35,114 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|))) (and (= 2 |c_ULTIMATE.start_main_~i~0#1|) (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (= (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|)) (select .cse0 (+ .cse1 4 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|)))) (not (= (select .cse0 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_378| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_378| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (not (= (select (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|)) (.cse3 (* |v_ULTIMATE.start_main_~i~0#1_378| 4))) (store .cse2 (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| .cse3) (select .cse2 (+ 4 |c_ULTIMATE.start_main_~#vectorx~0#1.offset| .cse3)))) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)))))) is different from false [2021-11-19 05:28:37,261 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|))) (and (not (= (select (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) (select .cse0 (+ .cse1 4 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|)))) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (not (= (select .cse0 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (exists ((|ULTIMATE.start_main_~i~0#1| Int)) (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|))) (and (or (= (select .cse2 (+ 8 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|)) (select .cse2 (+ 12 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|))) (= (* 4 |ULTIMATE.start_main_~i~0#1|) 12)) (<= 3 |ULTIMATE.start_main_~i~0#1|) (let ((.cse3 (* |ULTIMATE.start_main_~i~0#1| 4))) (= (select .cse2 (+ .cse3 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|)) (select .cse2 (+ .cse3 4 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|))))))) (forall ((|v_ULTIMATE.start_main_~i~0#1_378| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_378| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (not (= (select (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|)) (.cse5 (* |v_ULTIMATE.start_main_~i~0#1_378| 4))) (store .cse4 (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| .cse5) (select .cse4 (+ 4 |c_ULTIMATE.start_main_~#vectorx~0#1.offset| .cse5)))) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)))))) is different from false [2021-11-19 05:28:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:45,683 INFO L93 Difference]: Finished difference Result 568 states and 633 transitions. [2021-11-19 05:28:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-11-19 05:28:45,684 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.037313432835821) internal successors, (273), 134 states have internal predecessors, (273), 0 states have call successors, (0), 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 238 [2021-11-19 05:28:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:45,687 INFO L225 Difference]: With dead ends: 568 [2021-11-19 05:28:45,687 INFO L226 Difference]: Without dead ends: 418 [2021-11-19 05:28:45,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 450 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 3094 ImplicationChecksByTransitivity, 159.3s TimeCoverageRelationStatistics Valid=6232, Invalid=14070, Unknown=20, NotChecked=1140, Total=21462 [2021-11-19 05:28:45,691 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 177 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 399 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:45,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 189 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 553 Invalid, 0 Unknown, 399 Unchecked, 0.5s Time] [2021-11-19 05:28:45,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-19 05:28:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 386. [2021-11-19 05:28:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.0883116883116883) internal successors, (419), 385 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:28:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 419 transitions. [2021-11-19 05:28:45,718 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 419 transitions. Word has length 238 [2021-11-19 05:28:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:45,719 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 419 transitions. [2021-11-19 05:28:45,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.037313432835821) internal successors, (273), 134 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:28:45,720 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 419 transitions. [2021-11-19 05:28:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-19 05:28:45,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:45,723 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:45,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:45,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 05:28:45,946 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:45,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1829781791, now seen corresponding path program 1 times [2021-11-19 05:28:45,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:45,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738626122] [2021-11-19 05:28:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:45,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11679 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:28:51,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:51,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738626122] [2021-11-19 05:28:51,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738626122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:51,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578161024] [2021-11-19 05:28:51,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:51,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:51,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:51,540 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:51,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 05:28:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:51,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-19 05:28:51,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11679 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:28:58,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:29:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11679 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:29:13,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578161024] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:29:13,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:29:13,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111, 111] total 329 [2021-11-19 05:29:13,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106441081] [2021-11-19 05:29:13,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:29:13,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 329 states [2021-11-19 05:29:13,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:29:13,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 329 interpolants. [2021-11-19 05:29:13,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48178, Invalid=59734, Unknown=0, NotChecked=0, Total=107912 [2021-11-19 05:29:13,567 INFO L87 Difference]: Start difference. First operand 386 states and 419 transitions. Second operand has 329 states, 329 states have (on average 2.0425531914893615) internal successors, (672), 329 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:29:15,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:29:15,458 INFO L93 Difference]: Finished difference Result 773 states and 946 transitions. [2021-11-19 05:29:15,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2021-11-19 05:29:15,459 INFO L78 Accepts]: Start accepts. Automaton has has 329 states, 329 states have (on average 2.0425531914893615) internal successors, (672), 329 states have internal predecessors, (672), 0 states have call successors, (0), 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 242 [2021-11-19 05:29:15,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:29:15,463 INFO L225 Difference]: With dead ends: 773 [2021-11-19 05:29:15,463 INFO L226 Difference]: Without dead ends: 608 [2021-11-19 05:29:15,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47195 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=48178, Invalid=59734, Unknown=0, NotChecked=0, Total=107912 [2021-11-19 05:29:15,473 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 337 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:29:15,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 78 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 05:29:15,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-19 05:29:15,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 601. [2021-11-19 05:29:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 1.055) internal successors, (633), 600 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:29:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 633 transitions. [2021-11-19 05:29:15,508 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 633 transitions. Word has length 242 [2021-11-19 05:29:15,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:29:15,508 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 633 transitions. [2021-11-19 05:29:15,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 329 states, 329 states have (on average 2.0425531914893615) internal successors, (672), 329 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:29:15,510 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 633 transitions. [2021-11-19 05:29:15,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-11-19 05:29:15,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:29:15,519 INFO L514 BasicCegarLoop]: trace histogram [218, 218, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:29:15,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 05:29:15,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 05:29:15,740 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:29:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:29:15,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2077656771, now seen corresponding path program 2 times [2021-11-19 05:29:15,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:29:15,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014016962] [2021-11-19 05:29:15,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:29:15,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:29:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 47539 backedges. 0 proven. 47524 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:29:35,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:29:35,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014016962] [2021-11-19 05:29:35,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014016962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:29:35,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936832322] [2021-11-19 05:29:35,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:29:35,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:29:35,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:29:35,286 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:29:35,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 05:29:35,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:29:35,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:29:35,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 221 conjunts are in the unsatisfiable core [2021-11-19 05:29:35,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:29:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 47539 backedges. 0 proven. 47524 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:29:57,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:30:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 47539 backedges. 0 proven. 47524 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:30:54,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936832322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:30:54,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:30:54,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [221, 221, 221] total 659 [2021-11-19 05:30:54,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675154492] [2021-11-19 05:30:54,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:30:54,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 659 states [2021-11-19 05:30:54,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:30:54,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 659 interpolants. [2021-11-19 05:30:54,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193158, Invalid=240464, Unknown=0, NotChecked=0, Total=433622 [2021-11-19 05:30:54,977 INFO L87 Difference]: Start difference. First operand 601 states and 633 transitions. Second operand has 659 states, 659 states have (on average 2.0212443095599393) internal successors, (1332), 659 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:31:06,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:31:06,541 INFO L93 Difference]: Finished difference Result 1210 states and 1493 transitions. [2021-11-19 05:31:06,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 440 states. [2021-11-19 05:31:06,545 INFO L78 Accepts]: Start accepts. Automaton has has 659 states, 659 states have (on average 2.0212443095599393) internal successors, (1332), 659 states have internal predecessors, (1332), 0 states have call successors, (0), 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 462 [2021-11-19 05:31:06,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:31:06,553 INFO L225 Difference]: With dead ends: 1210 [2021-11-19 05:31:06,553 INFO L226 Difference]: Without dead ends: 1048 [2021-11-19 05:31:06,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1143 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 657 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191185 ImplicationChecksByTransitivity, 94.5s TimeCoverageRelationStatistics Valid=193158, Invalid=240464, Unknown=0, NotChecked=0, Total=433622 [2021-11-19 05:31:06,590 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 448 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:31:06,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 69 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 05:31:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-11-19 05:31:06,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1041. [2021-11-19 05:31:06,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 1.0317307692307693) internal successors, (1073), 1040 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:31:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1073 transitions. [2021-11-19 05:31:06,655 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1073 transitions. Word has length 462 [2021-11-19 05:31:06,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:31:06,656 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1073 transitions. [2021-11-19 05:31:06,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 659 states, 659 states have (on average 2.0212443095599393) internal successors, (1332), 659 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:31:06,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1073 transitions. [2021-11-19 05:31:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 903 [2021-11-19 05:31:06,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:31:06,701 INFO L514 BasicCegarLoop]: trace histogram [438, 438, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:31:06,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 05:31:06,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-19 05:31:06,922 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:31:06,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:31:06,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1451399179, now seen corresponding path program 3 times [2021-11-19 05:31:06,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:31:06,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710071163] [2021-11-19 05:31:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:31:06,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:31:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 191859 backedges. 0 proven. 191844 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:32:27,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:32:27,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710071163] [2021-11-19 05:32:27,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710071163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:32:27,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400073249] [2021-11-19 05:32:27,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:32:27,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:32:27,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:32:27,131 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:32:27,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd5e9aa5-450c-4147-9949-bce5724552b5/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 05:32:27,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 05:32:27,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:32:27,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:32:27,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:32:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 191859 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 191846 trivial. 0 not checked. [2021-11-19 05:32:29,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:32:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 191859 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 191846 trivial. 0 not checked. [2021-11-19 05:32:33,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400073249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:32:33,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:32:33,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [441, 8, 8] total 453 [2021-11-19 05:32:33,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308904335] [2021-11-19 05:32:33,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:32:33,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 453 states [2021-11-19 05:32:33,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:32:33,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 453 interpolants. [2021-11-19 05:32:33,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100595, Invalid=104161, Unknown=0, NotChecked=0, Total=204756 [2021-11-19 05:32:33,855 INFO L87 Difference]: Start difference. First operand 1041 states and 1073 transitions. Second operand has 453 states, 453 states have (on average 2.061810154525386) internal successors, (934), 453 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)