./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0 --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 e0068f83ad7eb3861b59041e8ebf2a38df44c3a60c0fafaf2450f6b793a60fbe --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:10:48,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:10:48,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:10:48,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:10:48,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:10:48,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:10:48,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:10:48,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:10:48,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:10:48,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:10:48,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:10:48,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:10:48,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:10:48,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:10:48,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:10:48,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:10:48,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:10:48,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:10:48,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:10:48,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:10:48,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:10:48,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:10:48,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:10:48,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:10:48,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:10:48,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:10:48,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:10:48,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:10:48,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:10:48,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:10:48,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:10:48,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:10:48,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:10:48,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:10:48,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:10:48,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:10:48,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:10:48,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:10:48,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:10:48,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:10:48,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:10:48,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 16:10:48,467 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:10:48,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:10:48,468 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:10:48,469 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:10:48,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:10:48,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:10:48,471 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:10:48,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:10:48,472 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:10:48,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:10:48,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:10:48,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:10:48,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 16:10:48,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:10:48,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 16:10:48,474 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:10:48,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 16:10:48,475 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:10:48,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 16:10:48,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:10:48,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:10:48,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:10:48,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:10:48,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:10:48,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:10:48,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 16:10:48,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:10:48,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:10:48,478 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 16:10:48,479 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 16:10:48,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 16:10:48,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:10:48,480 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_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0068f83ad7eb3861b59041e8ebf2a38df44c3a60c0fafaf2450f6b793a60fbe [2021-11-22 16:10:48,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:10:48,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:10:48,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:10:48,922 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:10:48,923 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:10:48,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2021-11-22 16:10:49,031 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/data/4c8fe8d9f/d4336fe6fb6a44f8b4490da7d8b6135a/FLAG1848b09e6 [2021-11-22 16:10:49,732 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:10:49,733 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2021-11-22 16:10:49,749 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/data/4c8fe8d9f/d4336fe6fb6a44f8b4490da7d8b6135a/FLAG1848b09e6 [2021-11-22 16:10:50,075 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/data/4c8fe8d9f/d4336fe6fb6a44f8b4490da7d8b6135a [2021-11-22 16:10:50,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:10:50,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:10:50,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:10:50,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:10:50,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:10:50,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:10:50" (1/1) ... [2021-11-22 16:10:50,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2512bb03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:50, skipping insertion in model container [2021-11-22 16:10:50,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:10:50" (1/1) ... [2021-11-22 16:10:50,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:10:50,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:10:50,426 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_2c021735-7256-4688-ac78-e438ead3c3d5/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c[946,959] [2021-11-22 16:10:50,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:10:50,447 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:10:50,475 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_2c021735-7256-4688-ac78-e438ead3c3d5/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c[946,959] [2021-11-22 16:10:50,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:10:50,499 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:10:50,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:50 WrapperNode [2021-11-22 16:10:50,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:10:50,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:10:50,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:10:50,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:10:50,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:50" (1/1) ... [2021-11-22 16:10:50,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:50" (1/1) ... [2021-11-22 16:10:50,553 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2021-11-22 16:10:50,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:10:50,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:10:50,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:10:50,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:10:50,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:50" (1/1) ... [2021-11-22 16:10:50,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:50" (1/1) ... [2021-11-22 16:10:50,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:50" (1/1) ... [2021-11-22 16:10:50,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:50" (1/1) ... [2021-11-22 16:10:50,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:50" (1/1) ... [2021-11-22 16:10:50,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:50" (1/1) ... [2021-11-22 16:10:50,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:50" (1/1) ... [2021-11-22 16:10:50,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:10:50,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:10:50,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:10:50,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:10:50,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:50" (1/1) ... [2021-11-22 16:10:50,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:10:50,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:10:50,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:10:50,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:10:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:10:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 16:10:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-11-22 16:10:50,732 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-11-22 16:10:50,733 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-11-22 16:10:50,733 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-11-22 16:10:50,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:10:50,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:10:50,816 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:10:50,818 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:10:50,960 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:10:50,970 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:10:50,971 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-22 16:10:50,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:10:50 BoogieIcfgContainer [2021-11-22 16:10:50,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:10:50,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:10:50,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:10:50,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:10:50,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:10:50" (1/3) ... [2021-11-22 16:10:50,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed51bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:10:50, skipping insertion in model container [2021-11-22 16:10:50,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:10:50" (2/3) ... [2021-11-22 16:10:50,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed51bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:10:50, skipping insertion in model container [2021-11-22 16:10:50,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:10:50" (3/3) ... [2021-11-22 16:10:50,988 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2021-11-22 16:10:50,996 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:10:50,996 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 16:10:51,081 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:10:51,100 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 [2021-11-22 16:10:51,100 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 16:10:51,126 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-22 16:10:51,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 16:10:51,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:10:51,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:10:51,149 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:10:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:10:51,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-11-22 16:10:51,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:10:51,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050619042] [2021-11-22 16:10:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:51,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:10:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:51,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 16:10:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:10:51,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:10:51,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050619042] [2021-11-22 16:10:51,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050619042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:10:51,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:10:51,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:10:51,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822586274] [2021-11-22 16:10:51,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:10:51,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:10:51,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:10:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:10:51,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:10:51,616 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 16:10:51,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:10:51,769 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-11-22 16:10:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:10:51,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-22 16:10:51,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:10:51,783 INFO L225 Difference]: With dead ends: 39 [2021-11-22 16:10:51,783 INFO L226 Difference]: Without dead ends: 27 [2021-11-22 16:10:51,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:10:51,792 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:10:51,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 89 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:10:51,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-22 16:10:51,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-22 16:10:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-22 16:10:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-22 16:10:51,852 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-11-22 16:10:51,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:10:51,853 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-22 16:10:51,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 16:10:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-22 16:10:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 16:10:51,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:10:51,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:10:51,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:10:51,857 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:10:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:10:51,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2021-11-22 16:10:51,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:10:51,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057351654] [2021-11-22 16:10:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:51,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:10:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:51,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 16:10:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:10:51,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:10:51,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057351654] [2021-11-22 16:10:51,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057351654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:10:51,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:10:51,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:10:51,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785235849] [2021-11-22 16:10:51,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:10:51,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:10:51,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:10:51,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:10:51,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:10:51,936 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 16:10:52,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:10:52,062 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-11-22 16:10:52,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:10:52,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-22 16:10:52,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:10:52,066 INFO L225 Difference]: With dead ends: 33 [2021-11-22 16:10:52,066 INFO L226 Difference]: Without dead ends: 29 [2021-11-22 16:10:52,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:10:52,070 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:10:52,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 77 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:10:52,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-22 16:10:52,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-11-22 16:10:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-22 16:10:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-22 16:10:52,113 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2021-11-22 16:10:52,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:10:52,114 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-22 16:10:52,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 16:10:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-22 16:10:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 16:10:52,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:10:52,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:10:52,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 16:10:52,133 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:10:52,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:10:52,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2021-11-22 16:10:52,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:10:52,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189883745] [2021-11-22 16:10:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:52,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:10:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:52,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 16:10:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:52,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:10:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:52,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-22 16:10:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:10:52,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:10:52,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189883745] [2021-11-22 16:10:52,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189883745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:10:52,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663330900] [2021-11-22 16:10:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:52,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:10:52,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:10:52,383 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:10:52,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:10:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:52,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:10:52,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:10:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:10:52,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:10:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:10:53,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663330900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:10:53,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:10:53,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-11-22 16:10:53,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623570333] [2021-11-22 16:10:53,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:10:53,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 16:10:53,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:10:53,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 16:10:53,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-22 16:10:53,178 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-22 16:10:53,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:10:53,458 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-11-22 16:10:53,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 16:10:53,460 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2021-11-22 16:10:53,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:10:53,466 INFO L225 Difference]: With dead ends: 55 [2021-11-22 16:10:53,467 INFO L226 Difference]: Without dead ends: 31 [2021-11-22 16:10:53,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-22 16:10:53,475 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:10:53,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 136 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:10:53,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-22 16:10:53,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-22 16:10:53,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-22 16:10:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-22 16:10:53,503 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-11-22 16:10:53,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:10:53,504 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-22 16:10:53,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-22 16:10:53,506 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-22 16:10:53,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-22 16:10:53,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:10:53,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:10:53,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:10:53,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:10:53,736 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:10:53,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:10:53,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2021-11-22 16:10:53,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:10:53,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222273227] [2021-11-22 16:10:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:53,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:10:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:53,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 16:10:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:53,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:10:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:53,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:10:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:10:53,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:10:53,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222273227] [2021-11-22 16:10:53,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222273227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:10:53,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746100353] [2021-11-22 16:10:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:53,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:10:53,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:10:53,972 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:10:53,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 16:10:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:54,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:10:54,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:10:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:10:54,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:10:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:10:54,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746100353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:10:54,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:10:54,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2021-11-22 16:10:54,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360338470] [2021-11-22 16:10:54,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:10:54,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 16:10:54,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:10:54,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 16:10:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-22 16:10:54,532 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-22 16:10:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:10:54,738 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2021-11-22 16:10:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:10:54,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2021-11-22 16:10:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:10:54,748 INFO L225 Difference]: With dead ends: 51 [2021-11-22 16:10:54,748 INFO L226 Difference]: Without dead ends: 47 [2021-11-22 16:10:54,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:10:54,753 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:10:54,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 110 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:10:54,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-22 16:10:54,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-11-22 16:10:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-22 16:10:54,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-11-22 16:10:54,785 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2021-11-22 16:10:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:10:54,787 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-11-22 16:10:54,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-22 16:10:54,792 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-11-22 16:10:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-22 16:10:54,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:10:54,799 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:10:54,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:10:54,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:10:55,000 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:10:55,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:10:55,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2021-11-22 16:10:55,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:10:55,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497866046] [2021-11-22 16:10:55,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:55,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:10:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:55,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 16:10:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:55,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:10:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:55,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:10:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:55,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-22 16:10:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:55,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-22 16:10:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:10:55,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:10:55,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497866046] [2021-11-22 16:10:55,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497866046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:10:55,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255948638] [2021-11-22 16:10:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:55,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:10:55,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:10:55,196 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:10:55,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 16:10:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:55,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 16:10:55,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:10:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 16:10:55,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:10:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 16:10:55,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255948638] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:10:55,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:10:55,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2021-11-22 16:10:55,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238724137] [2021-11-22 16:10:55,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:10:55,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 16:10:55,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:10:55,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 16:10:55,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-22 16:10:55,913 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-22 16:10:56,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:10:56,268 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2021-11-22 16:10:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 16:10:56,269 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2021-11-22 16:10:56,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:10:56,272 INFO L225 Difference]: With dead ends: 105 [2021-11-22 16:10:56,272 INFO L226 Difference]: Without dead ends: 63 [2021-11-22 16:10:56,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-11-22 16:10:56,275 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:10:56,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 159 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:10:56,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-22 16:10:56,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-22 16:10:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2021-11-22 16:10:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2021-11-22 16:10:56,292 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2021-11-22 16:10:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:10:56,292 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2021-11-22 16:10:56,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-22 16:10:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2021-11-22 16:10:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-22 16:10:56,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:10:56,296 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:10:56,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:10:56,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:10:56,512 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:10:56,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:10:56,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2021-11-22 16:10:56,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:10:56,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830851326] [2021-11-22 16:10:56,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:56,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:10:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:56,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 16:10:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:56,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:10:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:56,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:10:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:56,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:10:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:56,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:10:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 16:10:56,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:10:56,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830851326] [2021-11-22 16:10:56,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830851326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:10:56,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337480385] [2021-11-22 16:10:56,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:56,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:10:56,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:10:56,721 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:10:56,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 16:10:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:56,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 16:10:56,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:10:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:10:56,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:10:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 16:10:57,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337480385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:10:57,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:10:57,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2021-11-22 16:10:57,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937816214] [2021-11-22 16:10:57,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:10:57,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 16:10:57,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:10:57,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 16:10:57,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-22 16:10:57,519 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-22 16:10:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:10:58,057 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2021-11-22 16:10:58,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-22 16:10:58,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2021-11-22 16:10:58,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:10:58,067 INFO L225 Difference]: With dead ends: 177 [2021-11-22 16:10:58,067 INFO L226 Difference]: Without dead ends: 117 [2021-11-22 16:10:58,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-11-22 16:10:58,079 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 62 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:10:58,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 238 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:10:58,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-22 16:10:58,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2021-11-22 16:10:58,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2021-11-22 16:10:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2021-11-22 16:10:58,113 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2021-11-22 16:10:58,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:10:58,114 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2021-11-22 16:10:58,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-22 16:10:58,115 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2021-11-22 16:10:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 16:10:58,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:10:58,121 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:10:58,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:10:58,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:10:58,328 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:10:58,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:10:58,328 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2021-11-22 16:10:58,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:10:58,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331721587] [2021-11-22 16:10:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:58,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:10:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:58,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 16:10:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:58,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:10:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:58,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:10:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:58,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:10:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:58,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:10:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:58,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:10:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:58,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-22 16:10:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 16:10:58,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:10:58,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331721587] [2021-11-22 16:10:58,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331721587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:10:58,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017020620] [2021-11-22 16:10:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:10:58,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:10:58,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:10:58,560 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:10:58,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 16:10:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:10:58,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 16:10:58,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:10:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-22 16:10:58,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:10:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:10:59,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017020620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:10:59,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:10:59,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 20 [2021-11-22 16:10:59,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979417829] [2021-11-22 16:10:59,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:10:59,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-22 16:10:59,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:10:59,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-22 16:10:59,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-22 16:10:59,686 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) [2021-11-22 16:11:00,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:11:00,215 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2021-11-22 16:11:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-22 16:11:00,216 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) Word has length 51 [2021-11-22 16:11:00,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:11:00,226 INFO L225 Difference]: With dead ends: 255 [2021-11-22 16:11:00,226 INFO L226 Difference]: Without dead ends: 155 [2021-11-22 16:11:00,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-11-22 16:11:00,230 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 87 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:11:00,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 222 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:11:00,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-22 16:11:00,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2021-11-22 16:11:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 24 states have call successors, (24), 9 states have call predecessors, (24), 13 states have return successors, (66), 27 states have call predecessors, (66), 24 states have call successors, (66) [2021-11-22 16:11:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2021-11-22 16:11:00,310 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2021-11-22 16:11:00,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:11:00,311 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2021-11-22 16:11:00,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) [2021-11-22 16:11:00,312 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2021-11-22 16:11:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 16:11:00,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:11:00,323 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:11:00,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-22 16:11:00,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-22 16:11:00,539 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:11:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:11:00,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1851863125, now seen corresponding path program 1 times [2021-11-22 16:11:00,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:11:00,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356061189] [2021-11-22 16:11:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:11:00,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:11:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:00,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 16:11:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:00,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:00,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:00,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:00,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:00,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:00,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:00,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-22 16:11:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:00,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-22 16:11:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:00,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:00,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-22 16:11:00,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:11:00,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356061189] [2021-11-22 16:11:00,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356061189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:11:00,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462446299] [2021-11-22 16:11:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:11:00,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:11:00,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:11:00,864 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:11:00,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 16:11:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:00,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 16:11:00,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:11:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-22 16:11:01,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:11:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 12 proven. 78 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-22 16:11:02,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462446299] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:11:02,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:11:02,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2021-11-22 16:11:02,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282614896] [2021-11-22 16:11:02,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:11:02,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-22 16:11:02,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:11:02,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-22 16:11:02,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-22 16:11:02,430 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 23 states have internal predecessors, (73), 17 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (24), 11 states have call predecessors, (24), 17 states have call successors, (24) [2021-11-22 16:11:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:11:03,115 INFO L93 Difference]: Finished difference Result 240 states and 462 transitions. [2021-11-22 16:11:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-22 16:11:03,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 23 states have internal predecessors, (73), 17 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (24), 11 states have call predecessors, (24), 17 states have call successors, (24) Word has length 79 [2021-11-22 16:11:03,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:11:03,119 INFO L225 Difference]: With dead ends: 240 [2021-11-22 16:11:03,119 INFO L226 Difference]: Without dead ends: 107 [2021-11-22 16:11:03,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 16:11:03,123 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 107 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:11:03,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 224 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 16:11:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-22 16:11:03,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-11-22 16:11:03,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 58 states have internal predecessors, (67), 14 states have call successors, (14), 8 states have call predecessors, (14), 12 states have return successors, (35), 17 states have call predecessors, (35), 14 states have call successors, (35) [2021-11-22 16:11:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2021-11-22 16:11:03,141 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 79 [2021-11-22 16:11:03,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:11:03,142 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2021-11-22 16:11:03,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 23 states have internal predecessors, (73), 17 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (24), 11 states have call predecessors, (24), 17 states have call successors, (24) [2021-11-22 16:11:03,143 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2021-11-22 16:11:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-22 16:11:03,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:11:03,147 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:11:03,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 16:11:03,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:11:03,372 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:11:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:11:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash -31484793, now seen corresponding path program 1 times [2021-11-22 16:11:03,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:11:03,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226426276] [2021-11-22 16:11:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:11:03,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:11:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 16:11:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-22 16:11:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-22 16:11:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-22 16:11:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 66 proven. 113 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-22 16:11:03,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:11:03,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226426276] [2021-11-22 16:11:03,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226426276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:11:03,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597055846] [2021-11-22 16:11:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:11:03,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:11:03,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:11:03,871 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:11:03,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 16:11:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:03,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 16:11:03,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:11:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 53 proven. 104 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-22 16:11:04,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:11:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 53 proven. 109 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-22 16:11:05,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597055846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:11:05,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:11:05,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 11] total 21 [2021-11-22 16:11:05,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267395655] [2021-11-22 16:11:05,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:11:05,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 16:11:05,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:11:05,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 16:11:05,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-22 16:11:05,358 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand has 21 states, 20 states have (on average 3.55) internal successors, (71), 21 states have internal predecessors, (71), 14 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (26), 12 states have call predecessors, (26), 14 states have call successors, (26) [2021-11-22 16:11:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:11:05,874 INFO L93 Difference]: Finished difference Result 169 states and 248 transitions. [2021-11-22 16:11:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-22 16:11:05,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.55) internal successors, (71), 21 states have internal predecessors, (71), 14 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (26), 12 states have call predecessors, (26), 14 states have call successors, (26) Word has length 134 [2021-11-22 16:11:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:11:05,881 INFO L225 Difference]: With dead ends: 169 [2021-11-22 16:11:05,881 INFO L226 Difference]: Without dead ends: 93 [2021-11-22 16:11:05,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-11-22 16:11:05,887 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 79 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:11:05,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 286 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 16:11:05,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-22 16:11:05,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2021-11-22 16:11:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 60 states have internal predecessors, (69), 14 states have call successors, (14), 8 states have call predecessors, (14), 13 states have return successors, (35), 18 states have call predecessors, (35), 14 states have call successors, (35) [2021-11-22 16:11:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 118 transitions. [2021-11-22 16:11:05,917 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 118 transitions. Word has length 134 [2021-11-22 16:11:05,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:11:05,918 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 118 transitions. [2021-11-22 16:11:05,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.55) internal successors, (71), 21 states have internal predecessors, (71), 14 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (26), 12 states have call predecessors, (26), 14 states have call successors, (26) [2021-11-22 16:11:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 118 transitions. [2021-11-22 16:11:05,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-22 16:11:05,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:11:05,922 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:11:05,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 16:11:06,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:11:06,138 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:11:06,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:11:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2036151949, now seen corresponding path program 2 times [2021-11-22 16:11:06,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:11:06,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120710740] [2021-11-22 16:11:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:11:06,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:11:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 16:11:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-22 16:11:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-22 16:11:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-22 16:11:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-22 16:11:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 212 proven. 113 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-11-22 16:11:06,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:11:06,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120710740] [2021-11-22 16:11:06,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120710740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:11:06,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185671160] [2021-11-22 16:11:06,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:11:06,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:11:06,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:11:06,716 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:11:06,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 16:11:06,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:11:06,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:11:06,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 16:11:06,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:11:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 146 proven. 53 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2021-11-22 16:11:07,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:11:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 148 proven. 56 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2021-11-22 16:11:08,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185671160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:11:08,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:11:08,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 11] total 27 [2021-11-22 16:11:08,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85263406] [2021-11-22 16:11:08,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:11:08,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-22 16:11:08,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:11:08,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-22 16:11:08,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-11-22 16:11:08,304 INFO L87 Difference]: Start difference. First operand 87 states and 118 transitions. Second operand has 27 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 27 states have internal predecessors, (81), 17 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (30), 18 states have call predecessors, (30), 17 states have call successors, (30) [2021-11-22 16:11:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:11:08,917 INFO L93 Difference]: Finished difference Result 186 states and 278 transitions. [2021-11-22 16:11:08,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 16:11:08,918 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 27 states have internal predecessors, (81), 17 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (30), 18 states have call predecessors, (30), 17 states have call successors, (30) Word has length 161 [2021-11-22 16:11:08,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:11:08,920 INFO L225 Difference]: With dead ends: 186 [2021-11-22 16:11:08,921 INFO L226 Difference]: Without dead ends: 109 [2021-11-22 16:11:08,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 358 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-11-22 16:11:08,923 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 102 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:11:08,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 314 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 16:11:08,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-22 16:11:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2021-11-22 16:11:08,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 14 states have call successors, (14), 9 states have call predecessors, (14), 13 states have return successors, (29), 18 states have call predecessors, (29), 14 states have call successors, (29) [2021-11-22 16:11:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-11-22 16:11:08,948 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 161 [2021-11-22 16:11:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:11:08,951 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-11-22 16:11:08,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 27 states have internal predecessors, (81), 17 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (30), 18 states have call predecessors, (30), 17 states have call successors, (30) [2021-11-22 16:11:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-11-22 16:11:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-22 16:11:08,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:11:08,957 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 14, 14, 12, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:11:08,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 16:11:09,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:11:09,172 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:11:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:11:09,172 INFO L85 PathProgramCache]: Analyzing trace with hash -712391191, now seen corresponding path program 3 times [2021-11-22 16:11:09,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:11:09,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598042788] [2021-11-22 16:11:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:11:09,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:11:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 16:11:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-22 16:11:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-22 16:11:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-22 16:11:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-22 16:11:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-22 16:11:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 194 proven. 345 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2021-11-22 16:11:09,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:11:09,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598042788] [2021-11-22 16:11:09,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598042788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:11:09,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645622036] [2021-11-22 16:11:09,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:11:09,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:11:09,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:11:09,916 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:11:09,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 16:11:10,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-22 16:11:10,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:11:10,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:11:10,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:11:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 550 proven. 4 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2021-11-22 16:11:10,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:11:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 226 proven. 42 refuted. 0 times theorem prover too weak. 1007 trivial. 0 not checked. [2021-11-22 16:11:11,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645622036] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:11:11,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:11:11,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 28 [2021-11-22 16:11:11,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214748022] [2021-11-22 16:11:11,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:11:11,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-22 16:11:11,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:11:11,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-22 16:11:11,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-11-22 16:11:11,642 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 28 states, 27 states have (on average 3.074074074074074) internal successors, (83), 28 states have internal predecessors, (83), 13 states have call successors, (23), 2 states have call predecessors, (23), 12 states have return successors, (31), 18 states have call predecessors, (31), 13 states have call successors, (31) [2021-11-22 16:11:12,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:11:12,444 INFO L93 Difference]: Finished difference Result 226 states and 338 transitions. [2021-11-22 16:11:12,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-22 16:11:12,444 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.074074074074074) internal successors, (83), 28 states have internal predecessors, (83), 13 states have call successors, (23), 2 states have call predecessors, (23), 12 states have return successors, (31), 18 states have call predecessors, (31), 13 states have call successors, (31) Word has length 217 [2021-11-22 16:11:12,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:11:12,448 INFO L225 Difference]: With dead ends: 226 [2021-11-22 16:11:12,448 INFO L226 Difference]: Without dead ends: 138 [2021-11-22 16:11:12,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 486 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=1924, Unknown=0, NotChecked=0, Total=2256 [2021-11-22 16:11:12,452 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 171 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:11:12,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 301 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 16:11:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-22 16:11:12,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 120. [2021-11-22 16:11:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 81 states have internal predecessors, (97), 20 states have call successors, (20), 16 states have call predecessors, (20), 14 states have return successors, (39), 22 states have call predecessors, (39), 20 states have call successors, (39) [2021-11-22 16:11:12,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2021-11-22 16:11:12,466 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 217 [2021-11-22 16:11:12,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:11:12,467 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2021-11-22 16:11:12,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.074074074074074) internal successors, (83), 28 states have internal predecessors, (83), 13 states have call successors, (23), 2 states have call predecessors, (23), 12 states have return successors, (31), 18 states have call predecessors, (31), 13 states have call successors, (31) [2021-11-22 16:11:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2021-11-22 16:11:12,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-11-22 16:11:12,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:11:12,478 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 29, 29, 26, 25, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 14, 14, 12, 8, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:11:12,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 16:11:12,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:11:12,692 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:11:12,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:11:12,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1461102743, now seen corresponding path program 4 times [2021-11-22 16:11:12,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:11:12,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334016002] [2021-11-22 16:11:12,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:11:12,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:11:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 16:11:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-22 16:11:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-22 16:11:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-22 16:11:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-22 16:11:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-22 16:11:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-11-22 16:11:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-22 16:11:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-22 16:11:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-22 16:11:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:13,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:14,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:14,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:14,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:14,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:14,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:14,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-22 16:11:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:14,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:14,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:14,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-22 16:11:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:14,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:14,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:14,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:14,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5401 backedges. 181 proven. 647 refuted. 0 times theorem prover too weak. 4573 trivial. 0 not checked. [2021-11-22 16:11:14,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:11:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334016002] [2021-11-22 16:11:14,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334016002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:11:14,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231376851] [2021-11-22 16:11:14,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:11:14,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:11:14,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:11:14,064 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:11:14,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 16:11:14,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:11:14,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:11:14,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 16:11:14,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:11:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5401 backedges. 166 proven. 905 refuted. 0 times theorem prover too weak. 4330 trivial. 0 not checked. [2021-11-22 16:11:15,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:11:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5401 backedges. 166 proven. 926 refuted. 0 times theorem prover too weak. 4309 trivial. 0 not checked. [2021-11-22 16:11:18,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231376851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:11:18,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:11:18,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 27 [2021-11-22 16:11:18,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9600616] [2021-11-22 16:11:18,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:11:18,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-22 16:11:18,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:11:18,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-22 16:11:18,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-11-22 16:11:18,015 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 22 states have call successors, (27), 1 states have call predecessors, (27), 9 states have return successors, (33), 14 states have call predecessors, (33), 22 states have call successors, (33) [2021-11-22 16:11:18,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:11:18,430 INFO L93 Difference]: Finished difference Result 206 states and 283 transitions. [2021-11-22 16:11:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-22 16:11:18,431 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 22 states have call successors, (27), 1 states have call predecessors, (27), 9 states have return successors, (33), 14 states have call predecessors, (33), 22 states have call successors, (33) Word has length 433 [2021-11-22 16:11:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:11:18,434 INFO L225 Difference]: With dead ends: 206 [2021-11-22 16:11:18,434 INFO L226 Difference]: Without dead ends: 106 [2021-11-22 16:11:18,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1006 GetRequests, 976 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-11-22 16:11:18,436 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 60 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:11:18,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 404 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:11:18,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-22 16:11:18,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-11-22 16:11:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 76 states have (on average 1.144736842105263) internal successors, (87), 73 states have internal predecessors, (87), 17 states have call successors, (17), 15 states have call predecessors, (17), 12 states have return successors, (21), 17 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-22 16:11:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-11-22 16:11:18,444 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 433 [2021-11-22 16:11:18,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:11:18,445 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-11-22 16:11:18,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 22 states have call successors, (27), 1 states have call predecessors, (27), 9 states have return successors, (33), 14 states have call predecessors, (33), 22 states have call successors, (33) [2021-11-22 16:11:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-11-22 16:11:18,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-22 16:11:18,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:11:18,448 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:11:18,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 16:11:18,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:11:18,676 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:11:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:11:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash 521886258, now seen corresponding path program 5 times [2021-11-22 16:11:18,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:11:18,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224218404] [2021-11-22 16:11:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:11:18,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:11:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:18,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 16:11:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:18,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-22 16:11:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-22 16:11:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-22 16:11:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-22 16:11:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-11-22 16:11:19,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:11:19,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224218404] [2021-11-22 16:11:19,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224218404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:11:19,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909931877] [2021-11-22 16:11:19,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:11:19,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:11:19,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:11:19,923 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:11:19,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 16:11:20,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-22 16:11:20,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:11:20,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-22 16:11:20,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:11:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-11-22 16:11:21,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:11:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-11-22 16:11:23,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909931877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:11:23,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:11:23,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2021-11-22 16:11:23,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332933136] [2021-11-22 16:11:23,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:11:23,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-22 16:11:23,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:11:23,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-22 16:11:23,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2021-11-22 16:11:23,627 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 19 states have internal predecessors, (47), 7 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) [2021-11-22 16:11:23,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:11:23,995 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2021-11-22 16:11:23,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 16:11:23,996 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 19 states have internal predecessors, (47), 7 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) Word has length 174 [2021-11-22 16:11:23,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:11:23,998 INFO L225 Difference]: With dead ends: 123 [2021-11-22 16:11:23,998 INFO L226 Difference]: Without dead ends: 106 [2021-11-22 16:11:23,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 399 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2021-11-22 16:11:24,001 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:11:24,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1315 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:11:24,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-22 16:11:24,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-11-22 16:11:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 76 states have (on average 1.144736842105263) internal successors, (87), 73 states have internal predecessors, (87), 17 states have call successors, (17), 15 states have call predecessors, (17), 12 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-22 16:11:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2021-11-22 16:11:24,017 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 174 [2021-11-22 16:11:24,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:11:24,018 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2021-11-22 16:11:24,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 19 states have internal predecessors, (47), 7 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) [2021-11-22 16:11:24,019 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2021-11-22 16:11:24,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-22 16:11:24,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:11:24,022 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:11:24,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 16:11:24,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-22 16:11:24,248 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:11:24,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:11:24,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1309374191, now seen corresponding path program 6 times [2021-11-22 16:11:24,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:11:24,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029412853] [2021-11-22 16:11:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:11:24,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:11:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 16:11:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-22 16:11:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-22 16:11:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-22 16:11:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-22 16:11:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-22 16:11:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-22 16:11:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-22 16:11:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:11:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 103 proven. 277 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-11-22 16:11:24,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:11:24,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029412853] [2021-11-22 16:11:24,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029412853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:11:24,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871850655] [2021-11-22 16:11:24,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:11:24,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:11:24,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:11:24,703 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:11:24,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 16:11:24,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-22 16:11:24,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:11:24,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 16:11:24,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:11:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 524 proven. 55 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-22 16:11:25,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:11:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 103 proven. 271 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2021-11-22 16:11:26,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871850655] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:11:26,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:11:26,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 13] total 26 [2021-11-22 16:11:26,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893488051] [2021-11-22 16:11:26,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:11:26,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-22 16:11:26,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:11:26,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-22 16:11:26,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-11-22 16:11:26,469 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 26 states, 25 states have (on average 3.72) internal successors, (93), 26 states have internal predecessors, (93), 18 states have call successors, (30), 2 states have call predecessors, (30), 8 states have return successors, (34), 13 states have call predecessors, (34), 18 states have call successors, (34) [2021-11-22 16:11:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:11:26,752 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2021-11-22 16:11:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-22 16:11:26,753 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.72) internal successors, (93), 26 states have internal predecessors, (93), 18 states have call successors, (30), 2 states have call predecessors, (30), 8 states have return successors, (34), 13 states have call predecessors, (34), 18 states have call successors, (34) Word has length 188 [2021-11-22 16:11:26,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:11:26,754 INFO L225 Difference]: With dead ends: 122 [2021-11-22 16:11:26,754 INFO L226 Difference]: Without dead ends: 0 [2021-11-22 16:11:26,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 419 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-11-22 16:11:26,756 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:11:26,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 184 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:11:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-22 16:11:26,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-22 16:11:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:11:26,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-22 16:11:26,757 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 188 [2021-11-22 16:11:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:11:26,757 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-22 16:11:26,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.72) internal successors, (93), 26 states have internal predecessors, (93), 18 states have call successors, (30), 2 states have call predecessors, (30), 8 states have return successors, (34), 13 states have call predecessors, (34), 18 states have call successors, (34) [2021-11-22 16:11:26,758 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-22 16:11:26,758 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-22 16:11:26,761 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-22 16:11:26,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 16:11:26,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-22 16:11:26,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-22 16:11:28,568 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-22 16:11:28,568 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-22 16:11:28,569 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-22 16:11:28,569 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-22 16:11:28,569 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2021-11-22 16:11:28,569 INFO L854 garLoopResultBuilder]: At program point L43(lines 37 44) the Hoare annotation is: (<= 6 |ULTIMATE.start_main_~x~0#1|) [2021-11-22 16:11:28,569 INFO L858 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2021-11-22 16:11:28,570 INFO L858 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2021-11-22 16:11:28,570 INFO L854 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (<= 6 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 6)) [2021-11-22 16:11:28,570 INFO L858 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2021-11-22 16:11:28,570 INFO L858 garLoopResultBuilder]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2021-11-22 16:11:28,570 INFO L861 garLoopResultBuilder]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2021-11-22 16:11:28,570 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 1)) (= fibo2_~n |fibo2_#in~n|)) [2021-11-22 16:11:28,570 INFO L858 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-11-22 16:11:28,570 INFO L854 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (let ((.cse0 (<= fibo2_~n 3))) (and (or (and (<= |fibo2_#in~n| 4) (<= 4 fibo2_~n)) (and (<= |fibo2_#in~n| 2) (< 1 fibo2_~n)) (<= 6 fibo2_~n) (and (<= 3 |fibo2_#t~ret6|) (<= |fibo2_#t~ret6| 3)) (and (<= 3 fibo2_~n) .cse0)) (or (and (<= |fibo2_#t~ret6| 1) (<= 1 |fibo2_#t~ret6|)) (not (<= |fibo2_#in~n| 3))) (or (and (<= |fibo2_#t~ret6| 2) (<= 2 |fibo2_#t~ret6|)) .cse0 (<= 5 fibo2_~n)) (= fibo2_~n |fibo2_#in~n|))) [2021-11-22 16:11:28,570 INFO L858 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2021-11-22 16:11:28,571 INFO L858 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2021-11-22 16:11:28,571 INFO L858 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2021-11-22 16:11:28,571 INFO L858 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2021-11-22 16:11:28,571 INFO L858 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2021-11-22 16:11:28,571 INFO L861 garLoopResultBuilder]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2021-11-22 16:11:28,571 INFO L854 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: (and (= fibo1_~n |fibo1_#in~n|) (not (<= |fibo1_#in~n| 1))) [2021-11-22 16:11:28,571 INFO L858 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-11-22 16:11:28,571 INFO L854 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (and (or (<= |fibo1_#in~n| 3) (<= 5 fibo1_~n) (and (<= 2 |fibo1_#t~ret4|) (<= |fibo1_#t~ret4| 2))) (or (<= |fibo1_#in~n| 5) (<= 7 fibo1_~n) (and (<= |fibo1_#t~ret4| 5) (<= 5 |fibo1_#t~ret4|))) (< 1 fibo1_~n) (or (<= 4 fibo1_~n) (and (<= 1 |fibo1_#t~ret4|) (<= |fibo1_#t~ret4| 1))) (= fibo1_~n |fibo1_#in~n|)) [2021-11-22 16:11:28,572 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2021-11-22 16:11:28,572 INFO L858 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2021-11-22 16:11:28,572 INFO L858 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2021-11-22 16:11:28,572 INFO L858 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2021-11-22 16:11:28,572 INFO L858 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2021-11-22 16:11:28,575 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:11:28,576 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 16:11:28,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 04:11:28 BoogieIcfgContainer [2021-11-22 16:11:28,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 16:11:28,592 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 16:11:28,592 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 16:11:28,592 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 16:11:28,593 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:10:50" (3/4) ... [2021-11-22 16:11:28,597 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-22 16:11:28,604 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2021-11-22 16:11:28,605 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2021-11-22 16:11:28,610 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-22 16:11:28,610 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-22 16:11:28,610 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-22 16:11:28,610 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-22 16:11:28,648 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/witness.graphml [2021-11-22 16:11:28,648 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 16:11:28,649 INFO L158 Benchmark]: Toolchain (without parser) took 38563.11ms. Allocated memory was 98.6MB in the beginning and 268.4MB in the end (delta: 169.9MB). Free memory was 56.7MB in the beginning and 226.1MB in the end (delta: -169.4MB). Peak memory consumption was 1.1MB. Max. memory is 16.1GB. [2021-11-22 16:11:28,650 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 98.6MB. Free memory was 72.7MB in the beginning and 72.6MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 16:11:28,650 INFO L158 Benchmark]: CACSL2BoogieTranslator took 413.56ms. Allocated memory is still 98.6MB. Free memory was 56.4MB in the beginning and 72.6MB in the end (delta: -16.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-22 16:11:28,651 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.12ms. Allocated memory is still 98.6MB. Free memory was 72.6MB in the beginning and 71.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 16:11:28,651 INFO L158 Benchmark]: Boogie Preprocessor took 53.60ms. Allocated memory is still 98.6MB. Free memory was 71.3MB in the beginning and 70.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 16:11:28,651 INFO L158 Benchmark]: RCFGBuilder took 364.18ms. Allocated memory is still 98.6MB. Free memory was 70.1MB in the beginning and 60.9MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-22 16:11:28,652 INFO L158 Benchmark]: TraceAbstraction took 37615.78ms. Allocated memory was 98.6MB in the beginning and 268.4MB in the end (delta: 169.9MB). Free memory was 60.5MB in the beginning and 229.2MB in the end (delta: -168.7MB). Peak memory consumption was 120.8MB. Max. memory is 16.1GB. [2021-11-22 16:11:28,653 INFO L158 Benchmark]: Witness Printer took 56.54ms. Allocated memory is still 268.4MB. Free memory was 229.2MB in the beginning and 226.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-22 16:11:28,655 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 98.6MB. Free memory was 72.7MB in the beginning and 72.6MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 413.56ms. Allocated memory is still 98.6MB. Free memory was 56.4MB in the beginning and 72.6MB in the end (delta: -16.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.12ms. Allocated memory is still 98.6MB. Free memory was 72.6MB in the beginning and 71.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.60ms. Allocated memory is still 98.6MB. Free memory was 71.3MB in the beginning and 70.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 364.18ms. Allocated memory is still 98.6MB. Free memory was 70.1MB in the beginning and 60.9MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 37615.78ms. Allocated memory was 98.6MB in the beginning and 268.4MB in the end (delta: 169.9MB). Free memory was 60.5MB in the beginning and 229.2MB in the end (delta: -168.7MB). Peak memory consumption was 120.8MB. Max. memory is 16.1GB. * Witness Printer took 56.54ms. Allocated memory is still 268.4MB. Free memory was 229.2MB in the beginning and 226.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 37.5s, OverallIterations: 14, TraceHistogramMax: 34, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.1s, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 965 SdHoareTripleChecker+Valid, 3.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 885 mSDsluCounter, 4059 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3651 mSDsCounter, 901 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4640 IncrementalHoareTripleChecker+Invalid, 5541 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 901 mSolverCounterUnsat, 408 mSDtfsCounter, 4640 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3848 GetRequests, 3471 SyntacticMatches, 35 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=11, InterpolantAutomatonStates: 254, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 14 MinimizatonAttempts, 132 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 452 PreInvPairs, 640 NumberOfFragments, 136 HoareAnnotationTreeSize, 452 FomulaSimplifications, 3881 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 6265 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 24.6s InterpolantComputationTime, 3135 NumberOfCodeBlocks, 2897 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 4654 ConstructedInterpolants, 0 QuantifiedInterpolants, 8862 SizeOfPredicates, 42 NumberOfNonLiveVariables, 3132 ConjunctsInSsa, 207 ConjunctsInUnsatCore, 38 InterpolantComputations, 2 PerfectInterpolantSequences, 24054/29178 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 6 <= x RESULT: Ultimate proved your program to be correct! [2021-11-22 16:11:28,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c021735-7256-4688-ac78-e438ead3c3d5/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE