./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init6_ground-2.i --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_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/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_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init6_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/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_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/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 388c926a79a6b5e7bef889b40d9a18e5c4aeb62f40be1f5a1ab2f0fe0344f6c1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:56:39,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:56:39,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:56:39,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:56:39,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:56:39,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:56:39,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:56:39,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:56:39,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:56:39,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:56:39,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:56:39,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:56:39,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:56:39,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:56:39,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:56:39,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:56:39,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:56:39,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:56:39,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:56:39,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:56:39,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:56:39,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:56:39,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:56:39,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:56:39,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:56:39,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:56:39,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:56:39,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:56:39,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:56:39,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:56:39,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:56:39,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:56:39,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:56:39,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:56:39,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:56:39,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:56:39,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:56:39,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:56:39,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:56:39,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:56:39,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:56:39,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:56:39,540 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:56:39,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:56:39,542 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:56:39,551 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:56:39,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:56:39,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:56:39,554 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:56:39,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:56:39,554 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:56:39,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:56:39,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:56:39,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:56:39,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:56:39,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:56:39,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:56:39,559 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:56:39,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:56:39,559 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:56:39,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:56:39,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:56:39,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:56:39,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:56:39,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:56:39,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:56:39,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:56:39,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:56:39,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:56:39,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:56:39,563 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:56:39,566 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:56:39,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:56:39,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:56:39,568 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_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 388c926a79a6b5e7bef889b40d9a18e5c4aeb62f40be1f5a1ab2f0fe0344f6c1 [2021-11-22 14:56:39,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:56:39,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:56:39,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:56:39,926 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:56:39,927 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:56:39,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-examples/standard_init6_ground-2.i [2021-11-22 14:56:40,008 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/data/81989fa56/a5fc69ace533431cbc5372689f4011bd/FLAGd88ff4fd9 [2021-11-22 14:56:40,690 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:56:40,690 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/sv-benchmarks/c/array-examples/standard_init6_ground-2.i [2021-11-22 14:56:40,698 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/data/81989fa56/a5fc69ace533431cbc5372689f4011bd/FLAGd88ff4fd9 [2021-11-22 14:56:41,016 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/data/81989fa56/a5fc69ace533431cbc5372689f4011bd [2021-11-22 14:56:41,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:56:41,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:56:41,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:56:41,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:56:41,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:56:41,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:56:41" (1/1) ... [2021-11-22 14:56:41,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f69f46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:56:41, skipping insertion in model container [2021-11-22 14:56:41,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:56:41" (1/1) ... [2021-11-22 14:56:41,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:56:41,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:56:41,292 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_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/sv-benchmarks/c/array-examples/standard_init6_ground-2.i[816,829] [2021-11-22 14:56:41,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:56:41,322 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:56:41,338 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_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/sv-benchmarks/c/array-examples/standard_init6_ground-2.i[816,829] [2021-11-22 14:56:41,348 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:56:41,365 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:56:41,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:56:41 WrapperNode [2021-11-22 14:56:41,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:56:41,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:56:41,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:56:41,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:56:41,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:56:41" (1/1) ... [2021-11-22 14:56:41,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:56:41" (1/1) ... [2021-11-22 14:56:41,412 INFO L137 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2021-11-22 14:56:41,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:56:41,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:56:41,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:56:41,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:56:41,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:56:41" (1/1) ... [2021-11-22 14:56:41,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:56:41" (1/1) ... [2021-11-22 14:56:41,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:56:41" (1/1) ... [2021-11-22 14:56:41,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:56:41" (1/1) ... [2021-11-22 14:56:41,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:56:41" (1/1) ... [2021-11-22 14:56:41,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:56:41" (1/1) ... [2021-11-22 14:56:41,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:56:41" (1/1) ... [2021-11-22 14:56:41,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:56:41,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:56:41,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:56:41,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:56:41,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:56:41" (1/1) ... [2021-11-22 14:56:41,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:56:41,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:56:41,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:56:41,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:56:41,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:56:41,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:56:41,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 14:56:41,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 14:56:41,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:56:41,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:56:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 14:56:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 14:56:41,651 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:56:41,653 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:56:41,828 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:56:41,836 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:56:41,837 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-22 14:56:41,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:56:41 BoogieIcfgContainer [2021-11-22 14:56:41,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:56:41,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:56:41,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:56:41,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:56:41,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:56:41" (1/3) ... [2021-11-22 14:56:41,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb9ea81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:56:41, skipping insertion in model container [2021-11-22 14:56:41,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:56:41" (2/3) ... [2021-11-22 14:56:41,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb9ea81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:56:41, skipping insertion in model container [2021-11-22 14:56:41,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:56:41" (3/3) ... [2021-11-22 14:56:41,868 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2021-11-22 14:56:41,875 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:56:41,875 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:56:41,942 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:56:41,952 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 14:56:41,952 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:56:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 14:56:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 14:56:41,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:41,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:56:41,986 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:41,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:42,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1501159767, now seen corresponding path program 1 times [2021-11-22 14:56:42,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:42,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935873548] [2021-11-22 14:56:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:42,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:42,266 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 14:56:42,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:42,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935873548] [2021-11-22 14:56:42,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935873548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:56:42,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:56:42,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:56:42,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490606731] [2021-11-22 14:56:42,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:56:42,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:56:42,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:56:42,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:56:42,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:56:42,339 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states 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 14:56:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:42,510 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2021-11-22 14:56:42,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:56:42,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 14:56:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:42,535 INFO L225 Difference]: With dead ends: 51 [2021-11-22 14:56:42,548 INFO L226 Difference]: Without dead ends: 26 [2021-11-22 14:56:42,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:56:42,558 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:42,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:56:42,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-22 14:56:42,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-22 14:56:42,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:56:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-22 14:56:42,638 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2021-11-22 14:56:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:56:42,639 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-22 14:56:42,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states 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 14:56:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-22 14:56:42,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 14:56:42,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:42,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:56:42,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:56:42,643 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:42,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1833326096, now seen corresponding path program 1 times [2021-11-22 14:56:42,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:42,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587354809] [2021-11-22 14:56:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:42,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 14:56:42,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:42,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587354809] [2021-11-22 14:56:42,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587354809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:56:42,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766960473] [2021-11-22 14:56:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:42,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:56:42,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:56:42,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:56:42,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:56:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:42,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:56:42,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:56:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 14:56:43,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:56:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 14:56:43,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766960473] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:56:43,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:56:43,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 14:56:43,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668491019] [2021-11-22 14:56:43,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:56:43,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:56:43,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:56:43,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:56:43,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:56:43,136 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:56:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:43,317 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2021-11-22 14:56:43,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:56:43,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-22 14:56:43,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:43,322 INFO L225 Difference]: With dead ends: 66 [2021-11-22 14:56:43,325 INFO L226 Difference]: Without dead ends: 44 [2021-11-22 14:56:43,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:56:43,328 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:43,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:56:43,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-22 14:56:43,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-22 14:56:43,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:56:43,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-11-22 14:56:43,347 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 23 [2021-11-22 14:56:43,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:56:43,347 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-11-22 14:56:43,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:56:43,348 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-11-22 14:56:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-22 14:56:43,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:43,351 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:56:43,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-22 14:56:43,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:56:43,578 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:43,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:43,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1875666669, now seen corresponding path program 2 times [2021-11-22 14:56:43,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:43,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467833533] [2021-11-22 14:56:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:43,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-22 14:56:43,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:43,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467833533] [2021-11-22 14:56:43,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467833533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:56:43,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974622093] [2021-11-22 14:56:43,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:56:43,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:56:43,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:56:43,798 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:56:43,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:56:43,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:56:43,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:56:43,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:56:43,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:56:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-22 14:56:44,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:56:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-22 14:56:44,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974622093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:56:44,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:56:44,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-22 14:56:44,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645829080] [2021-11-22 14:56:44,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:56:44,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 14:56:44,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:56:44,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 14:56:44,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-22 14:56:44,287 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:56:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:44,572 INFO L93 Difference]: Finished difference Result 117 states and 164 transitions. [2021-11-22 14:56:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 14:56:44,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-22 14:56:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:44,576 INFO L225 Difference]: With dead ends: 117 [2021-11-22 14:56:44,576 INFO L226 Difference]: Without dead ends: 80 [2021-11-22 14:56:44,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-22 14:56:44,580 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:44,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:56:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-22 14:56:44,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-22 14:56:44,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 79 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 14:56:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-11-22 14:56:44,611 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 41 [2021-11-22 14:56:44,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:56:44,612 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-11-22 14:56:44,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:56:44,612 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-11-22 14:56:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-22 14:56:44,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:44,617 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:56:44,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:56:44,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:56:44,839 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:44,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:44,841 INFO L85 PathProgramCache]: Analyzing trace with hash 489153587, now seen corresponding path program 3 times [2021-11-22 14:56:44,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:44,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861811866] [2021-11-22 14:56:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:44,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-22 14:56:45,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:45,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861811866] [2021-11-22 14:56:45,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861811866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:56:45,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059591953] [2021-11-22 14:56:45,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:56:45,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:56:45,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:56:45,295 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:56:45,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:56:55,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-22 14:56:55,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:56:55,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 14:56:55,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:56:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-22 14:56:56,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:56:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-22 14:56:56,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059591953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:56:56,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:56:56,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-22 14:56:56,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008803882] [2021-11-22 14:56:56,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:56:56,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 14:56:56,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:56:56,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 14:56:56,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-22 14:56:56,664 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:56:57,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:57,254 INFO L93 Difference]: Finished difference Result 219 states and 302 transitions. [2021-11-22 14:56:57,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 14:56:57,255 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-22 14:56:57,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:57,258 INFO L225 Difference]: With dead ends: 219 [2021-11-22 14:56:57,259 INFO L226 Difference]: Without dead ends: 152 [2021-11-22 14:56:57,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-22 14:56:57,262 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:57,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 14:56:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-22 14:56:57,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-11-22 14:56:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0463576158940397) internal successors, (158), 151 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:56:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 158 transitions. [2021-11-22 14:56:57,298 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 158 transitions. Word has length 77 [2021-11-22 14:56:57,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:56:57,299 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 158 transitions. [2021-11-22 14:56:57,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:56:57,300 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 158 transitions. [2021-11-22 14:56:57,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-22 14:56:57,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:57,309 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:56:57,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:56:57,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:56:57,511 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:57,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:57,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1929724531, now seen corresponding path program 4 times [2021-11-22 14:56:57,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:57,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137724554] [2021-11-22 14:56:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:57,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-22 14:56:58,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:58,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137724554] [2021-11-22 14:56:58,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137724554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:56:58,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413695227] [2021-11-22 14:56:58,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:56:58,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:56:58,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:56:58,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:56:58,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:56:58,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:56:58,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:56:58,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-22 14:56:58,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:56:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-22 14:56:58,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:57:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-22 14:57:00,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413695227] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:57:00,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:57:00,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-11-22 14:57:00,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499288156] [2021-11-22 14:57:00,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:57:00,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-22 14:57:00,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:57:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-22 14:57:00,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 14:57:00,090 INFO L87 Difference]: Start difference. First operand 152 states and 158 transitions. Second operand has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:01,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:57:01,239 INFO L93 Difference]: Finished difference Result 423 states and 578 transitions. [2021-11-22 14:57:01,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-22 14:57:01,241 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-22 14:57:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:57:01,251 INFO L225 Difference]: With dead ends: 423 [2021-11-22 14:57:01,252 INFO L226 Difference]: Without dead ends: 296 [2021-11-22 14:57:01,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 14:57:01,263 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 917 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 917 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 14:57:01,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [917 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 14:57:01,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-22 14:57:01,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-11-22 14:57:01,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.023728813559322) internal successors, (302), 295 states have internal predecessors, (302), 0 states have call successors, (0), 0 states 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 14:57:01,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 302 transitions. [2021-11-22 14:57:01,317 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 302 transitions. Word has length 149 [2021-11-22 14:57:01,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:57:01,317 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 302 transitions. [2021-11-22 14:57:01,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:01,318 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 302 transitions. [2021-11-22 14:57:01,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-11-22 14:57:01,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:01,341 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:57:01,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:57:01,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:01,566 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:57:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:01,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1284825357, now seen corresponding path program 5 times [2021-11-22 14:57:01,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:01,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332213693] [2021-11-22 14:57:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:01,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2021-11-22 14:57:03,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:57:03,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332213693] [2021-11-22 14:57:03,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332213693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:57:03,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928324740] [2021-11-22 14:57:03,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:57:03,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:03,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:57:03,324 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:57:03,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3f3e2db-969f-46e6-8057-18c2d47ec2d6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process