./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_partition_ground-1.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_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/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_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partition_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/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_e9658df2-34c0-4847-9c7f-2fc212a07d05/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 6c4a57140d9977d38b2a20d40c88df51a4fcb7b14a0fb7c51e0b4e36cddf9998 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:24:13,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:24:13,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:24:13,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:24:13,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:24:13,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:24:13,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:24:13,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:24:13,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:24:13,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:24:13,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:24:13,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:24:13,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:24:13,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:24:13,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:24:13,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:24:13,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:24:13,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:24:13,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:24:13,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:24:13,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:24:13,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:24:13,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:24:13,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:24:13,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:24:13,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:24:13,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:24:13,480 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:24:13,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:24:13,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:24:13,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:24:13,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:24:13,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:24:13,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:24:13,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:24:13,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:24:13,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:24:13,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:24:13,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:24:13,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:24:13,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:24:13,496 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:24:13,524 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:24:13,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:24:13,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:24:13,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:24:13,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:24:13,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:24:13,528 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:24:13,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:24:13,529 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:24:13,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:24:13,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:24:13,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:24:13,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:24:13,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:24:13,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:24:13,531 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:24:13,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:24:13,532 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:24:13,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:24:13,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:24:13,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:24:13,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:24:13,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:24:13,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:24:13,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:24:13,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:24:13,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:24:13,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:24:13,536 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:24:13,537 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:24:13,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:24:13,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:24:13,538 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_e9658df2-34c0-4847-9c7f-2fc212a07d05/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c4a57140d9977d38b2a20d40c88df51a4fcb7b14a0fb7c51e0b4e36cddf9998 [2021-11-22 15:24:13,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:24:13,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:24:13,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:24:13,918 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:24:13,919 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:24:13,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2021-11-22 15:24:14,004 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/data/be3c6f3db/904ba5927fe9477a88e577c2287c8693/FLAGaa08bdd32 [2021-11-22 15:24:14,461 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:24:14,462 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2021-11-22 15:24:14,469 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/data/be3c6f3db/904ba5927fe9477a88e577c2287c8693/FLAGaa08bdd32 [2021-11-22 15:24:14,836 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/data/be3c6f3db/904ba5927fe9477a88e577c2287c8693 [2021-11-22 15:24:14,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:24:14,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:24:14,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:24:14,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:24:14,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:24:14,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:24:14" (1/1) ... [2021-11-22 15:24:14,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44bdd674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:24:14, skipping insertion in model container [2021-11-22 15:24:14,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:24:14" (1/1) ... [2021-11-22 15:24:14,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:24:14,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:24:15,092 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_e9658df2-34c0-4847-9c7f-2fc212a07d05/sv-benchmarks/c/array-examples/standard_partition_ground-1.i[860,873] [2021-11-22 15:24:15,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:24:15,121 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:24:15,136 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_e9658df2-34c0-4847-9c7f-2fc212a07d05/sv-benchmarks/c/array-examples/standard_partition_ground-1.i[860,873] [2021-11-22 15:24:15,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:24:15,163 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:24:15,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:24:15 WrapperNode [2021-11-22 15:24:15,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:24:15,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:24:15,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:24:15,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:24:15,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:24:15" (1/1) ... [2021-11-22 15:24:15,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:24:15" (1/1) ... [2021-11-22 15:24:15,210 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2021-11-22 15:24:15,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:24:15,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:24:15,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:24:15,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:24:15,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:24:15" (1/1) ... [2021-11-22 15:24:15,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:24:15" (1/1) ... [2021-11-22 15:24:15,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:24:15" (1/1) ... [2021-11-22 15:24:15,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:24:15" (1/1) ... [2021-11-22 15:24:15,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:24:15" (1/1) ... [2021-11-22 15:24:15,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:24:15" (1/1) ... [2021-11-22 15:24:15,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:24:15" (1/1) ... [2021-11-22 15:24:15,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:24:15,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:24:15,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:24:15,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:24:15,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:24:15" (1/1) ... [2021-11-22 15:24:15,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:24:15,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:24:15,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:24:15,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:24:15,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:24:15,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:24:15,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:24:15,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 15:24:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:24:15,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:24:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 15:24:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:24:15,453 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:24:15,455 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:24:15,642 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:24:15,664 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:24:15,664 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-22 15:24:15,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:24:15 BoogieIcfgContainer [2021-11-22 15:24:15,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:24:15,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:24:15,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:24:15,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:24:15,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:24:14" (1/3) ... [2021-11-22 15:24:15,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461c1b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:24:15, skipping insertion in model container [2021-11-22 15:24:15,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:24:15" (2/3) ... [2021-11-22 15:24:15,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461c1b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:24:15, skipping insertion in model container [2021-11-22 15:24:15,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:24:15" (3/3) ... [2021-11-22 15:24:15,699 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2021-11-22 15:24:15,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:24:15,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-22 15:24:15,817 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:24:15,824 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 15:24:15,825 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-22 15:24:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 26 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 15:24:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-22 15:24:15,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:15,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:15,847 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:24:15,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash 232427437, now seen corresponding path program 1 times [2021-11-22 15:24:15,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:24:15,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076709411] [2021-11-22 15:24:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:15,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:24:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:16,011 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 15:24:16,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:24:16,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076709411] [2021-11-22 15:24:16,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076709411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:24:16,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:24:16,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:24:16,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271706861] [2021-11-22 15:24:16,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:24:16,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 15:24:16,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:24:16,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 15:24:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:24:16,069 INFO L87 Difference]: Start difference. First operand has 27 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 26 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 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 15:24:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:16,092 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2021-11-22 15:24:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 15:24:16,094 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-11-22 15:24:16,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:16,102 INFO L225 Difference]: With dead ends: 49 [2021-11-22 15:24:16,102 INFO L226 Difference]: Without dead ends: 23 [2021-11-22 15:24:16,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:24:16,110 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:16,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:24:16,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-22 15:24:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-22 15:24:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 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 15:24:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-11-22 15:24:16,147 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2021-11-22 15:24:16,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:16,148 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-11-22 15:24:16,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 15:24:16,149 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-11-22 15:24:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-22 15:24:16,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:16,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:16,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:24:16,150 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:24:16,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash -950337193, now seen corresponding path program 1 times [2021-11-22 15:24:16,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:24:16,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882640733] [2021-11-22 15:24:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:16,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:24:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:16,219 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 15:24:16,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:24:16,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882640733] [2021-11-22 15:24:16,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882640733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:24:16,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:24:16,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:24:16,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214429285] [2021-11-22 15:24:16,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:24:16,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:24:16,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:24:16,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:24:16,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:24:16,224 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 15:24:16,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:16,273 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-11-22 15:24:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:24:16,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-22 15:24:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:16,275 INFO L225 Difference]: With dead ends: 47 [2021-11-22 15:24:16,276 INFO L226 Difference]: Without dead ends: 29 [2021-11-22 15:24:16,276 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 15:24:16,278 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:16,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 40 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:24:16,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-22 15:24:16,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-11-22 15:24:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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 15:24:16,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-11-22 15:24:16,287 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 9 [2021-11-22 15:24:16,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:16,288 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-11-22 15:24:16,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 15:24:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-11-22 15:24:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 15:24:16,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:16,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:16,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:24:16,290 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:24:16,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:16,291 INFO L85 PathProgramCache]: Analyzing trace with hash 166796571, now seen corresponding path program 1 times [2021-11-22 15:24:16,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:24:16,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677431986] [2021-11-22 15:24:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:16,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:24:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:24:16,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:24:16,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677431986] [2021-11-22 15:24:16,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677431986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:24:16,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905200276] [2021-11-22 15:24:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:16,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:24:16,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:24:16,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:24:16,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:24:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:16,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:24:16,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:24:16,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:24:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:24:16,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905200276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:24:16,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:24:16,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 15:24:16,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831151465] [2021-11-22 15:24:16,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:24:16,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:24:16,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:24:16,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:24:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:24:16,695 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:16,812 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2021-11-22 15:24:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:24:16,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 15:24:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:16,814 INFO L225 Difference]: With dead ends: 62 [2021-11-22 15:24:16,815 INFO L226 Difference]: Without dead ends: 43 [2021-11-22 15:24:16,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 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 15:24:16,817 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:16,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 62 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:24:16,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-22 15:24:16,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-22 15:24:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 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 15:24:16,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-11-22 15:24:16,826 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 15 [2021-11-22 15:24:16,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:16,827 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-11-22 15:24:16,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:16,827 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-11-22 15:24:16,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 15:24:16,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:16,829 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:16,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:24:17,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-22 15:24:17,056 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:24:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:17,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1782137303, now seen corresponding path program 2 times [2021-11-22 15:24:17,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:24:17,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692837553] [2021-11-22 15:24:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:17,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:24:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-22 15:24:17,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:24:17,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692837553] [2021-11-22 15:24:17,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692837553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:24:17,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:24:17,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:24:17,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317858598] [2021-11-22 15:24:17,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:24:17,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:24:17,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:24:17,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:24:17,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:24:17,191 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:17,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:17,220 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2021-11-22 15:24:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:24:17,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-22 15:24:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:17,222 INFO L225 Difference]: With dead ends: 96 [2021-11-22 15:24:17,222 INFO L226 Difference]: Without dead ends: 83 [2021-11-22 15:24:17,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:24:17,224 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:17,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 62 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:24:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-22 15:24:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 70. [2021-11-22 15:24:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 69 states have internal predecessors, (90), 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 15:24:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2021-11-22 15:24:17,244 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 33 [2021-11-22 15:24:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:17,245 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2021-11-22 15:24:17,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:17,245 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2021-11-22 15:24:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 15:24:17,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:17,247 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:17,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 15:24:17,251 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:24:17,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:17,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1359435477, now seen corresponding path program 1 times [2021-11-22 15:24:17,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:24:17,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232034037] [2021-11-22 15:24:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:17,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:24:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-22 15:24:17,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:24:17,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232034037] [2021-11-22 15:24:17,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232034037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:24:17,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038701149] [2021-11-22 15:24:17,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:17,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:24:17,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:24:17,409 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:24:17,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:24:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:17,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 15:24:17,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-22 15:24:17,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:24:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-22 15:24:17,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038701149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:24:17,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:24:17,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-22 15:24:17,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24255096] [2021-11-22 15:24:17,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:24:17,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 15:24:17,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:24:17,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 15:24:17,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-22 15:24:17,849 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:18,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:18,039 INFO L93 Difference]: Finished difference Result 186 states and 265 transitions. [2021-11-22 15:24:18,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 15:24:18,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-22 15:24:18,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:18,042 INFO L225 Difference]: With dead ends: 186 [2021-11-22 15:24:18,042 INFO L226 Difference]: Without dead ends: 142 [2021-11-22 15:24:18,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 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 15:24:18,045 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 95 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:18,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 104 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:24:18,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-22 15:24:18,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-22 15:24:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 140 states have (on average 1.3285714285714285) internal successors, (186), 141 states have internal predecessors, (186), 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 15:24:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2021-11-22 15:24:18,065 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 33 [2021-11-22 15:24:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:18,065 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2021-11-22 15:24:18,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2021-11-22 15:24:18,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-22 15:24:18,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:18,069 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:18,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:24:18,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:24:18,296 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:24:18,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:18,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1885262869, now seen corresponding path program 2 times [2021-11-22 15:24:18,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:24:18,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146054721] [2021-11-22 15:24:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:18,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:24:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-22 15:24:18,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:24:18,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146054721] [2021-11-22 15:24:18,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146054721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:24:18,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433438597] [2021-11-22 15:24:18,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:24:18,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:24:18,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:24:18,576 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:24:18,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:24:18,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:24:18,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:24:18,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 15:24:18,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-22 15:24:18,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:24:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-22 15:24:19,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433438597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:24:19,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:24:19,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-22 15:24:19,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306208467] [2021-11-22 15:24:19,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:24:19,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 15:24:19,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:24:19,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 15:24:19,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-22 15:24:19,242 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 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 15:24:19,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:19,569 INFO L93 Difference]: Finished difference Result 366 states and 529 transitions. [2021-11-22 15:24:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 15:24:19,570 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 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 69 [2021-11-22 15:24:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:19,581 INFO L225 Difference]: With dead ends: 366 [2021-11-22 15:24:19,581 INFO L226 Difference]: Without dead ends: 286 [2021-11-22 15:24:19,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-22 15:24:19,586 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 312 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:19,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 96 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:24:19,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-22 15:24:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2021-11-22 15:24:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 284 states have (on average 1.3309859154929577) internal successors, (378), 285 states have internal predecessors, (378), 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 15:24:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 378 transitions. [2021-11-22 15:24:19,639 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 378 transitions. Word has length 69 [2021-11-22 15:24:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:19,640 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 378 transitions. [2021-11-22 15:24:19,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 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 15:24:19,640 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 378 transitions. [2021-11-22 15:24:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-22 15:24:19,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:19,652 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:19,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:24:19,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-22 15:24:19,860 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:24:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:19,860 INFO L85 PathProgramCache]: Analyzing trace with hash -985878891, now seen corresponding path program 3 times [2021-11-22 15:24:19,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:24:19,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529481317] [2021-11-22 15:24:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:19,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:24:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-22 15:24:20,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:24:20,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529481317] [2021-11-22 15:24:20,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529481317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:24:20,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768245648] [2021-11-22 15:24:20,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:24:20,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:24:20,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:24:20,357 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:24:20,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:25:13,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-11-22 15:25:13,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:25:13,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-22 15:25:13,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:25:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-22 15:25:13,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:25:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-22 15:25:14,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768245648] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:25:14,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:25:14,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-11-22 15:25:14,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14538099] [2021-11-22 15:25:14,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:25:14,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-22 15:25:14,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:25:14,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-22 15:25:14,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 15:25:14,677 INFO L87 Difference]: Start difference. First operand 286 states and 378 transitions. Second operand has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:25:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:25:15,497 INFO L93 Difference]: Finished difference Result 726 states and 1057 transitions. [2021-11-22 15:25:15,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-22 15:25:15,498 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-22 15:25:15,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:25:15,502 INFO L225 Difference]: With dead ends: 726 [2021-11-22 15:25:15,502 INFO L226 Difference]: Without dead ends: 574 [2021-11-22 15:25:15,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 15:25:15,507 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 774 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:25:15,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 176 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 15:25:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-22 15:25:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-22 15:25:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 572 states have (on average 1.332167832167832) internal successors, (762), 573 states have internal predecessors, (762), 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 15:25:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 762 transitions. [2021-11-22 15:25:15,538 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 762 transitions. Word has length 141 [2021-11-22 15:25:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:25:15,539 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 762 transitions. [2021-11-22 15:25:15,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:25:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 762 transitions. [2021-11-22 15:25:15,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-22 15:25:15,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:25:15,546 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:25:15,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:25:15,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-22 15:25:15,747 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:25:15,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:25:15,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1204558955, now seen corresponding path program 4 times [2021-11-22 15:25:15,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:25:15,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854166999] [2021-11-22 15:25:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:25:15,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:25:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:25:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-11-22 15:25:17,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:25:17,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854166999] [2021-11-22 15:25:17,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854166999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:25:17,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246736305] [2021-11-22 15:25:17,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:25:17,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:25:17,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:25:17,163 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:25:17,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:31:55,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:31:55,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:31:55,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-22 15:31:55,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:31:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-11-22 15:31:55,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:31:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-11-22 15:31:58,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246736305] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:31:58,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:31:58,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-11-22 15:31:58,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568404700] [2021-11-22 15:31:58,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:31:58,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-22 15:31:58,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:31:58,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-22 15:31:58,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-22 15:31:58,856 INFO L87 Difference]: Start difference. First operand 574 states and 762 transitions. Second operand has 97 states, 97 states have (on average 4.494845360824742) internal successors, (436), 97 states have internal predecessors, (436), 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 15:32:01,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:01,213 INFO L93 Difference]: Finished difference Result 1446 states and 2113 transitions. [2021-11-22 15:32:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-22 15:32:01,214 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.494845360824742) internal successors, (436), 97 states have internal predecessors, (436), 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 285 [2021-11-22 15:32:01,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:01,221 INFO L225 Difference]: With dead ends: 1446 [2021-11-22 15:32:01,221 INFO L226 Difference]: Without dead ends: 1150 [2021-11-22 15:32:01,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-22 15:32:01,226 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1364 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:01,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1364 Valid, 290 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-22 15:32:01,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-11-22 15:32:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1150. [2021-11-22 15:32:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1148 states have (on average 1.3327526132404182) internal successors, (1530), 1149 states have internal predecessors, (1530), 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 15:32:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1530 transitions. [2021-11-22 15:32:01,274 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1530 transitions. Word has length 285 [2021-11-22 15:32:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:01,275 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1530 transitions. [2021-11-22 15:32:01,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.494845360824742) internal successors, (436), 97 states have internal predecessors, (436), 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 15:32:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1530 transitions. [2021-11-22 15:32:01,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2021-11-22 15:32:01,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:01,288 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:01,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:32:01,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:32:01,489 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:01,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1729121685, now seen corresponding path program 5 times [2021-11-22 15:32:01,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:01,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957555681] [2021-11-22 15:32:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:01,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 26414 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2021-11-22 15:32:05,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:05,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957555681] [2021-11-22 15:32:05,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957555681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:32:05,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871735660] [2021-11-22 15:32:05,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:32:05,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:32:05,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:32:05,387 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:32:05,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9658df2-34c0-4847-9c7f-2fc212a07d05/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process