./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init6_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init6_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff138f81519ab5ff475befdf624922816837c8f1983c223aa78c0525de509876 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:33:40,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:33:40,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:33:40,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:33:40,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:33:40,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:33:40,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:33:40,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:33:40,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:33:40,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:33:40,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:33:40,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:33:40,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:33:40,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:33:40,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:33:40,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:33:40,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:33:40,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:33:40,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:33:40,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:33:40,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:33:40,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:33:40,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:33:40,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:33:40,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:33:40,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:33:40,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:33:40,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:33:40,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:33:40,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:33:40,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:33:40,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:33:40,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:33:40,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:33:40,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:33:40,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:33:40,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:33:40,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:33:40,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:33:40,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:33:40,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:33:40,493 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:33:40,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:33:40,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:33:40,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:33:40,550 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:33:40,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:33:40,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:33:40,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:33:40,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:33:40,558 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:33:40,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:33:40,560 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:33:40,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:33:40,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:33:40,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:33:40,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:33:40,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:33:40,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:33:40,562 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:33:40,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:33:40,562 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:33:40,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:33:40,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:33:40,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:33:40,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:33:40,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:33:40,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:33:40,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:33:40,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:33:40,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:33:40,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:33:40,572 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:33:40,573 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:33:40,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:33:40,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:33:40,573 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_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff138f81519ab5ff475befdf624922816837c8f1983c223aa78c0525de509876 [2021-11-19 05:33:40,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:33:40,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:33:40,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:33:40,919 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:33:40,920 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:33:40,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-examples/standard_init6_ground-1.i [2021-11-19 05:33:40,999 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/data/616b767f4/d0b2330a1e3f40f996125f88bae65fe5/FLAG353106ee4 [2021-11-19 05:33:41,668 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:33:41,669 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/sv-benchmarks/c/array-examples/standard_init6_ground-1.i [2021-11-19 05:33:41,685 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/data/616b767f4/d0b2330a1e3f40f996125f88bae65fe5/FLAG353106ee4 [2021-11-19 05:33:41,964 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/data/616b767f4/d0b2330a1e3f40f996125f88bae65fe5 [2021-11-19 05:33:41,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:33:41,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:33:41,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:33:41,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:33:41,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:33:41,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:33:41" (1/1) ... [2021-11-19 05:33:41,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6417a403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:41, skipping insertion in model container [2021-11-19 05:33:41,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:33:41" (1/1) ... [2021-11-19 05:33:41,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:33:42,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:33:42,213 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_e262ac43-bc1d-43ca-84f1-ef5f3c041377/sv-benchmarks/c/array-examples/standard_init6_ground-1.i[816,829] [2021-11-19 05:33:42,232 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:33:42,240 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:33:42,254 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_e262ac43-bc1d-43ca-84f1-ef5f3c041377/sv-benchmarks/c/array-examples/standard_init6_ground-1.i[816,829] [2021-11-19 05:33:42,264 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:33:42,281 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:33:42,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:42 WrapperNode [2021-11-19 05:33:42,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:33:42,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:33:42,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:33:42,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:33:42,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:42" (1/1) ... [2021-11-19 05:33:42,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:42" (1/1) ... [2021-11-19 05:33:42,326 INFO L137 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2021-11-19 05:33:42,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:33:42,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:33:42,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:33:42,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:33:42,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:42" (1/1) ... [2021-11-19 05:33:42,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:42" (1/1) ... [2021-11-19 05:33:42,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:42" (1/1) ... [2021-11-19 05:33:42,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:42" (1/1) ... [2021-11-19 05:33:42,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:42" (1/1) ... [2021-11-19 05:33:42,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:42" (1/1) ... [2021-11-19 05:33:42,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:42" (1/1) ... [2021-11-19 05:33:42,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:33:42,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:33:42,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:33:42,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:33:42,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:42" (1/1) ... [2021-11-19 05:33:42,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:33:42,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:42,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:33:42,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:33:42,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:33:42,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:33:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:33:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:33:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:33:42,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:33:42,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:33:42,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:33:42,531 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:33:42,533 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:33:42,693 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:33:42,700 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:33:42,701 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-19 05:33:42,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:33:42 BoogieIcfgContainer [2021-11-19 05:33:42,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:33:42,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:33:42,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:33:42,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:33:42,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:33:41" (1/3) ... [2021-11-19 05:33:42,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f0bf37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:33:42, skipping insertion in model container [2021-11-19 05:33:42,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:42" (2/3) ... [2021-11-19 05:33:42,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f0bf37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:33:42, skipping insertion in model container [2021-11-19 05:33:42,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:33:42" (3/3) ... [2021-11-19 05:33:42,714 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-1.i [2021-11-19 05:33:42,736 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:33:42,737 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:33:42,833 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:33:42,842 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 05:33:42,842 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:33:42,860 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) [2021-11-19 05:33:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 05:33:42,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:42,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:42,868 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:42,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:42,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1501159767, now seen corresponding path program 1 times [2021-11-19 05:33:42,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:42,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372151441] [2021-11-19 05:33:42,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:42,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:43,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:43,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372151441] [2021-11-19 05:33:43,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372151441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:43,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:43,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:33:43,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213261579] [2021-11-19 05:33:43,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:43,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:33:43,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:43,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:33:43,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:33:43,229 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) [2021-11-19 05:33:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:43,323 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2021-11-19 05:33:43,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:33:43,326 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 [2021-11-19 05:33:43,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:43,335 INFO L225 Difference]: With dead ends: 51 [2021-11-19 05:33:43,336 INFO L226 Difference]: Without dead ends: 26 [2021-11-19 05:33:43,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:33:43,344 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 [2021-11-19 05:33:43,346 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] [2021-11-19 05:33:43,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-19 05:33:43,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-19 05:33:43,384 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) [2021-11-19 05:33:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-19 05:33:43,387 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2021-11-19 05:33:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:43,387 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-19 05:33:43,388 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) [2021-11-19 05:33:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-19 05:33:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 05:33:43,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:43,390 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] [2021-11-19 05:33:43,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:33:43,391 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:43,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:43,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1833326096, now seen corresponding path program 1 times [2021-11-19 05:33:43,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:43,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934707908] [2021-11-19 05:33:43,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:43,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:33:43,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:43,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934707908] [2021-11-19 05:33:43,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934707908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:33:43,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187132863] [2021-11-19 05:33:43,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:43,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:43,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:43,477 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:33:43,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:33:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:43,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:33:43,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:33:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:33:43,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:33:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:33:43,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187132863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:33:43,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:33:43,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-19 05:33:43,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850667726] [2021-11-19 05:33:43,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:33:43,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:33:43,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:43,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:33:43,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:33:43,850 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) [2021-11-19 05:33:44,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:44,059 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2021-11-19 05:33:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:33:44,064 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 [2021-11-19 05:33:44,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:44,065 INFO L225 Difference]: With dead ends: 66 [2021-11-19 05:33:44,066 INFO L226 Difference]: Without dead ends: 44 [2021-11-19 05:33:44,066 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 [2021-11-19 05:33:44,068 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, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:44,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:33:44,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-19 05:33:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-19 05:33:44,087 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) [2021-11-19 05:33:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-11-19 05:33:44,096 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 23 [2021-11-19 05:33:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:44,097 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-11-19 05:33:44,097 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) [2021-11-19 05:33:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-11-19 05:33:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 05:33:44,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:44,099 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] [2021-11-19 05:33:44,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:33:44,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:44,327 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:44,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1875666669, now seen corresponding path program 2 times [2021-11-19 05:33:44,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:44,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623604884] [2021-11-19 05:33:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:44,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-19 05:33:44,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:44,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623604884] [2021-11-19 05:33:44,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623604884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:33:44,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220401171] [2021-11-19 05:33:44,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:33:44,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:44,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:44,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:33:44,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:33:44,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:33:44,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:33:44,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:33:44,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:33:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-19 05:33:44,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:33:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-19 05:33:45,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220401171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:33:45,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:33:45,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-19 05:33:45,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257704016] [2021-11-19 05:33:45,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:33:45,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 05:33:45,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:45,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 05:33:45,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:33:45,050 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) [2021-11-19 05:33:45,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:45,340 INFO L93 Difference]: Finished difference Result 117 states and 164 transitions. [2021-11-19 05:33:45,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:33:45,341 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 [2021-11-19 05:33:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:45,343 INFO L225 Difference]: With dead ends: 117 [2021-11-19 05:33:45,343 INFO L226 Difference]: Without dead ends: 80 [2021-11-19 05:33:45,344 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 [2021-11-19 05:33:45,346 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 [2021-11-19 05:33:45,347 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] [2021-11-19 05:33:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-19 05:33:45,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-19 05:33:45,361 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) [2021-11-19 05:33:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-11-19 05:33:45,363 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 41 [2021-11-19 05:33:45,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:45,364 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-11-19 05:33:45,364 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) [2021-11-19 05:33:45,364 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-11-19 05:33:45,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-19 05:33:45,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:45,368 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] [2021-11-19 05:33:45,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:33:45,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:45,597 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:45,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:45,598 INFO L85 PathProgramCache]: Analyzing trace with hash 489153587, now seen corresponding path program 3 times [2021-11-19 05:33:45,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:45,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693502550] [2021-11-19 05:33:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:45,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-19 05:33:45,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:45,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693502550] [2021-11-19 05:33:45,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693502550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:33:45,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685671988] [2021-11-19 05:33:45,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:33:45,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:45,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:45,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:33:45,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:33:52,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-19 05:33:52,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:33:52,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 05:33:52,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:33:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-19 05:33:52,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:33:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-19 05:33:52,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685671988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:33:52,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:33:52,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-19 05:33:52,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309534594] [2021-11-19 05:33:52,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:33:52,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 05:33:52,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:52,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 05:33:52,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:33:52,937 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) [2021-11-19 05:33:53,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:53,457 INFO L93 Difference]: Finished difference Result 219 states and 302 transitions. [2021-11-19 05:33:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 05:33:53,458 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 [2021-11-19 05:33:53,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:53,460 INFO L225 Difference]: With dead ends: 219 [2021-11-19 05:33:53,460 INFO L226 Difference]: Without dead ends: 152 [2021-11-19 05:33:53,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:33:53,463 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:53,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:33:53,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-19 05:33:53,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-11-19 05:33:53,484 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) [2021-11-19 05:33:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 158 transitions. [2021-11-19 05:33:53,486 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 158 transitions. Word has length 77 [2021-11-19 05:33:53,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:53,487 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 158 transitions. [2021-11-19 05:33:53,487 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) [2021-11-19 05:33:53,488 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 158 transitions. [2021-11-19 05:33:53,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 05:33:53,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:53,496 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] [2021-11-19 05:33:53,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:33:53,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:53,697 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:53,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1929724531, now seen corresponding path program 4 times [2021-11-19 05:33:53,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:53,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318857398] [2021-11-19 05:33:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:53,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-19 05:33:54,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:54,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318857398] [2021-11-19 05:33:54,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318857398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:33:54,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076968917] [2021-11-19 05:33:54,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:33:54,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:54,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:54,323 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:33:54,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:33:54,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:33:54,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:33:54,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 05:33:54,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:33:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-19 05:33:54,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:33:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-19 05:33:56,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076968917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:33:56,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:33:56,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-11-19 05:33:56,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536075871] [2021-11-19 05:33:56,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:33:56,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-19 05:33:56,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:56,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-19 05:33:56,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 05:33:56,165 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) [2021-11-19 05:33:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:57,249 INFO L93 Difference]: Finished difference Result 423 states and 578 transitions. [2021-11-19 05:33:57,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-19 05:33:57,250 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 [2021-11-19 05:33:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:57,257 INFO L225 Difference]: With dead ends: 423 [2021-11-19 05:33:57,257 INFO L226 Difference]: Without dead ends: 296 [2021-11-19 05:33:57,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 05:33:57,269 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 [2021-11-19 05:33:57,270 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] [2021-11-19 05:33:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-19 05:33:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-11-19 05:33:57,335 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) [2021-11-19 05:33:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 302 transitions. [2021-11-19 05:33:57,338 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 302 transitions. Word has length 149 [2021-11-19 05:33:57,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:57,339 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 302 transitions. [2021-11-19 05:33:57,339 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) [2021-11-19 05:33:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 302 transitions. [2021-11-19 05:33:57,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-11-19 05:33:57,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:57,347 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] [2021-11-19 05:33:57,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:33:57,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:57,548 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:57,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:57,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1284825357, now seen corresponding path program 5 times [2021-11-19 05:33:57,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:57,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452683476] [2021-11-19 05:33:57,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:57,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2021-11-19 05:33:59,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:59,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452683476] [2021-11-19 05:33:59,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452683476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:33:59,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536464192] [2021-11-19 05:33:59,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:33:59,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:59,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:59,205 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:33:59,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e262ac43-bc1d-43ca-84f1-ef5f3c041377/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process