./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pnr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa --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 c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:20:30,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:20:30,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:20:30,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:20:30,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:20:30,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:20:30,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:20:30,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:20:30,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:20:30,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:20:30,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:20:30,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:20:30,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:20:30,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:20:30,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:20:30,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:20:30,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:20:30,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:20:30,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:20:30,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:20:30,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:20:30,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:20:30,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:20:30,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:20:30,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:20:30,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:20:30,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:20:30,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:20:30,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:20:30,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:20:30,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:20:30,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:20:30,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:20:30,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:20:30,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:20:30,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:20:30,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:20:30,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:20:30,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:20:30,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:20:30,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:20:30,440 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:20:30,464 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:20:30,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:20:30,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:20:30,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:20:30,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:20:30,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:20:30,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:20:30,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:20:30,467 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:20:30,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:20:30,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:20:30,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:20:30,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:20:30,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:20:30,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:20:30,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:20:30,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:20:30,468 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:20:30,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:20:30,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:20:30,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:20:30,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:20:30,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:20:30,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:20:30,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:20:30,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:20:30,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:20:30,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:20:30,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:20:30,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:20:30,471 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:20:30,471 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:20:30,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:20:30,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:20:30,472 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_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b [2021-12-06 19:20:30,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:20:30,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:20:30,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:20:30,694 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:20:30,695 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:20:30,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-tiling/pnr5.c [2021-12-06 19:20:30,736 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/data/7f0780d56/41504b53af354af3b988cc93ae0b6ca1/FLAG6d71536bb [2021-12-06 19:20:31,126 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:20:31,126 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/sv-benchmarks/c/array-tiling/pnr5.c [2021-12-06 19:20:31,131 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/data/7f0780d56/41504b53af354af3b988cc93ae0b6ca1/FLAG6d71536bb [2021-12-06 19:20:31,140 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/data/7f0780d56/41504b53af354af3b988cc93ae0b6ca1 [2021-12-06 19:20:31,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:20:31,143 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:20:31,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:20:31,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:20:31,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:20:31,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:20:31" (1/1) ... [2021-12-06 19:20:31,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@293fec3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:20:31, skipping insertion in model container [2021-12-06 19:20:31,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:20:31" (1/1) ... [2021-12-06 19:20:31,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:20:31,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:20:31,288 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_172fff76-c65d-4003-b1b6-52078a02246c/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2021-12-06 19:20:31,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:20:31,311 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:20:31,320 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_172fff76-c65d-4003-b1b6-52078a02246c/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2021-12-06 19:20:31,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:20:31,338 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:20:31,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:20:31 WrapperNode [2021-12-06 19:20:31,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:20:31,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:20:31,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:20:31,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:20:31,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:20:31" (1/1) ... [2021-12-06 19:20:31,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:20:31" (1/1) ... [2021-12-06 19:20:31,368 INFO L137 Inliner]: procedures = 17, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2021-12-06 19:20:31,368 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:20:31,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:20:31,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:20:31,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:20:31,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:20:31" (1/1) ... [2021-12-06 19:20:31,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:20:31" (1/1) ... [2021-12-06 19:20:31,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:20:31" (1/1) ... [2021-12-06 19:20:31,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:20:31" (1/1) ... [2021-12-06 19:20:31,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:20:31" (1/1) ... [2021-12-06 19:20:31,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:20:31" (1/1) ... [2021-12-06 19:20:31,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:20:31" (1/1) ... [2021-12-06 19:20:31,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:20:31,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:20:31,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:20:31,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:20:31,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:20:31" (1/1) ... [2021-12-06 19:20:31,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:20:31,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:20:31,419 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:20:31,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:20:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:20:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:20:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 19:20:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 19:20:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2021-12-06 19:20:31,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2021-12-06 19:20:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:20:31,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:20:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 19:20:31,505 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:20:31,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:20:31,633 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:20:31,638 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:20:31,638 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 19:20:31,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:20:31 BoogieIcfgContainer [2021-12-06 19:20:31,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:20:31,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:20:31,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:20:31,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:20:31,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:20:31" (1/3) ... [2021-12-06 19:20:31,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1557d123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:20:31, skipping insertion in model container [2021-12-06 19:20:31,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:20:31" (2/3) ... [2021-12-06 19:20:31,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1557d123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:20:31, skipping insertion in model container [2021-12-06 19:20:31,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:20:31" (3/3) ... [2021-12-06 19:20:31,646 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr5.c [2021-12-06 19:20:31,650 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:20:31,650 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:20:31,686 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:20:31,691 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 [2021-12-06 19:20:31,691 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:20:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 19:20:31,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:20:31,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:20:31,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:20:31,709 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:20:31,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:20:31,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1765780314, now seen corresponding path program 1 times [2021-12-06 19:20:31,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:20:31,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020144267] [2021-12-06 19:20:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:31,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:20:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:20:31,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:20:31,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020144267] [2021-12-06 19:20:31,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020144267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:20:31,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:20:31,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:20:31,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446866795] [2021-12-06 19:20:31,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:20:31,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:20:31,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:20:31,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:20:31,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:20:31,871 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-12-06 19:20:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:20:31,888 INFO L93 Difference]: Finished difference Result 69 states and 98 transitions. [2021-12-06 19:20:31,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:20:31,890 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-12-06 19:20:31,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:20:31,895 INFO L225 Difference]: With dead ends: 69 [2021-12-06 19:20:31,896 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 19:20:31,898 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 [2021-12-06 19:20:31,901 INFO L933 BasicCegarLoop]: 49 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, 49 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 [2021-12-06 19:20:31,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:20:31,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 19:20:31,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-06 19:20:31,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 19:20:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-12-06 19:20:31,936 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 11 [2021-12-06 19:20:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:20:31,937 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-12-06 19:20:31,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-12-06 19:20:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-12-06 19:20:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:20:31,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:20:31,938 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:20:31,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:20:31,938 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:20:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:20:31,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1807338759, now seen corresponding path program 1 times [2021-12-06 19:20:31,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:20:31,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763802580] [2021-12-06 19:20:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:31,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:20:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:20:32,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:20:32,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763802580] [2021-12-06 19:20:32,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763802580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:20:32,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:20:32,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:20:32,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515081962] [2021-12-06 19:20:32,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:20:32,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:20:32,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:20:32,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:20:32,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:20:32,081 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-12-06 19:20:32,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:20:32,181 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2021-12-06 19:20:32,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:20:32,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 11 [2021-12-06 19:20:32,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:20:32,183 INFO L225 Difference]: With dead ends: 57 [2021-12-06 19:20:32,184 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 19:20:32,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:20:32,186 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:20:32,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 40 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:20:32,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 19:20:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2021-12-06 19:20:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 19:20:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-12-06 19:20:32,199 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 11 [2021-12-06 19:20:32,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:20:32,199 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-12-06 19:20:32,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-12-06 19:20:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-12-06 19:20:32,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 19:20:32,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:20:32,201 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:20:32,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:20:32,202 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:20:32,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:20:32,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1950771071, now seen corresponding path program 1 times [2021-12-06 19:20:32,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:20:32,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958978050] [2021-12-06 19:20:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:32,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:20:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:32,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:20:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:32,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:20:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:32,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:20:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:32,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:20:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:32,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:20:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:32,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:20:32,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958978050] [2021-12-06 19:20:32,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958978050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:20:32,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828236286] [2021-12-06 19:20:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:32,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:32,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:20:32,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:20:32,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:20:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:32,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 19:20:32,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:20:32,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:20:32,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:20:32,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:20:32,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:20:32,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:20:32,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:20:32,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:20:32,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:20:32,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-06 19:20:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:32,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:20:32,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 19:20:32,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-06 19:20:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:32,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828236286] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:20:32,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:20:32,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2021-12-06 19:20:32,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608409401] [2021-12-06 19:20:32,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:20:32,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 19:20:32,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:20:32,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 19:20:32,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:20:32,987 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 19:20:33,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:20:33,248 INFO L93 Difference]: Finished difference Result 120 states and 171 transitions. [2021-12-06 19:20:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:20:33,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2021-12-06 19:20:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:20:33,251 INFO L225 Difference]: With dead ends: 120 [2021-12-06 19:20:33,252 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 19:20:33,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:20:33,254 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:20:33,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 293 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:20:33,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 19:20:33,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 54. [2021-12-06 19:20:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:20:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2021-12-06 19:20:33,270 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 43 [2021-12-06 19:20:33,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:20:33,270 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2021-12-06 19:20:33,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 19:20:33,271 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2021-12-06 19:20:33,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 19:20:33,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:20:33,273 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:20:33,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:20:33,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:33,474 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:20:33,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:20:33,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1642596351, now seen corresponding path program 1 times [2021-12-06 19:20:33,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:20:33,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449467623] [2021-12-06 19:20:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:33,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:20:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:33,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:20:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:33,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:20:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:33,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:20:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:33,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:20:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:33,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:20:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:33,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:20:33,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449467623] [2021-12-06 19:20:33,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449467623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:20:33,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049449637] [2021-12-06 19:20:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:33,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:33,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:20:33,777 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:20:33,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:20:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:33,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 19:20:33,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:20:33,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:20:33,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:20:33,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:20:34,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:20:34,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:20:34,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:20:34,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:20:34,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:20:34,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 19:20:34,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:20:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:20:34,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:20:34,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 19:20:34,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-06 19:20:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:34,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049449637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:20:34,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:20:34,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2021-12-06 19:20:34,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904161950] [2021-12-06 19:20:34,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:20:34,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:20:34,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:20:34,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:20:34,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:20:34,429 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 19:20:34,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:20:34,969 INFO L93 Difference]: Finished difference Result 179 states and 251 transitions. [2021-12-06 19:20:34,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 19:20:34,970 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 43 [2021-12-06 19:20:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:20:34,973 INFO L225 Difference]: With dead ends: 179 [2021-12-06 19:20:34,973 INFO L226 Difference]: Without dead ends: 177 [2021-12-06 19:20:34,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 19:20:34,976 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 145 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:20:34,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 516 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 643 Invalid, 0 Unknown, 94 Unchecked, 0.3s Time] [2021-12-06 19:20:34,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-06 19:20:34,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 87. [2021-12-06 19:20:34,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.359375) internal successors, (87), 65 states have internal predecessors, (87), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 19:20:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 127 transitions. [2021-12-06 19:20:34,998 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 127 transitions. Word has length 43 [2021-12-06 19:20:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:20:34,999 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 127 transitions. [2021-12-06 19:20:34,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 19:20:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 127 transitions. [2021-12-06 19:20:35,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 19:20:35,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:20:35,001 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:20:35,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:20:35,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:35,203 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:20:35,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:20:35,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1666037387, now seen corresponding path program 1 times [2021-12-06 19:20:35,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:20:35,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81458100] [2021-12-06 19:20:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:35,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:20:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:35,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:20:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:35,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:20:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:35,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:20:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:35,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:20:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:35,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:20:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:35,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:20:35,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81458100] [2021-12-06 19:20:35,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81458100] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:20:35,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461764704] [2021-12-06 19:20:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:35,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:35,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:20:35,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:20:35,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:20:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:35,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 19:20:35,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:20:35,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:20:35,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:20:35,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:20:35,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:20:35,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:20:35,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:20:35,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:20:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:35,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:20:35,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:20:35,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 19:20:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:35,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461764704] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:20:35,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:20:35,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2021-12-06 19:20:35,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359207738] [2021-12-06 19:20:35,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:20:35,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 19:20:35,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:20:35,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 19:20:35,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:20:35,795 INFO L87 Difference]: Start difference. First operand 87 states and 127 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 19:20:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:20:36,092 INFO L93 Difference]: Finished difference Result 322 states and 492 transitions. [2021-12-06 19:20:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 19:20:36,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 47 [2021-12-06 19:20:36,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:20:36,096 INFO L225 Difference]: With dead ends: 322 [2021-12-06 19:20:36,096 INFO L226 Difference]: Without dead ends: 320 [2021-12-06 19:20:36,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:20:36,098 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 147 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:20:36,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 345 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:20:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-06 19:20:36,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 153. [2021-12-06 19:20:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.3928571428571428) internal successors, (156), 114 states have internal predecessors, (156), 38 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-06 19:20:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2021-12-06 19:20:36,133 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 47 [2021-12-06 19:20:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:20:36,134 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2021-12-06 19:20:36,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 19:20:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2021-12-06 19:20:36,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 19:20:36,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:20:36,136 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:20:36,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:20:36,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:36,337 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:20:36,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:20:36,337 INFO L85 PathProgramCache]: Analyzing trace with hash -279833993, now seen corresponding path program 1 times [2021-12-06 19:20:36,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:20:36,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733442638] [2021-12-06 19:20:36,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:36,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:20:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:36,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:20:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:36,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:20:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:36,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:20:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:36,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:20:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:36,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:20:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:36,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:20:36,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733442638] [2021-12-06 19:20:36,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733442638] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:20:36,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352264643] [2021-12-06 19:20:36,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:36,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:36,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:20:36,504 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:20:36,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:20:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:36,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 19:20:36,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:20:36,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:20:36,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:20:36,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:20:36,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:20:36,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:20:36,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:20:36,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 19:20:36,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:20:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 19:20:36,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:20:37,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:20:37,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 19:20:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:37,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352264643] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:20:37,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:20:37,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2021-12-06 19:20:37,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897647262] [2021-12-06 19:20:37,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:20:37,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 19:20:37,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:20:37,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 19:20:37,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:20:37,073 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 19:20:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:20:37,626 INFO L93 Difference]: Finished difference Result 432 states and 643 transitions. [2021-12-06 19:20:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 19:20:37,626 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 47 [2021-12-06 19:20:37,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:20:37,629 INFO L225 Difference]: With dead ends: 432 [2021-12-06 19:20:37,629 INFO L226 Difference]: Without dead ends: 430 [2021-12-06 19:20:37,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 19:20:37,631 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 182 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:20:37,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 629 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 684 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2021-12-06 19:20:37,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-12-06 19:20:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 220. [2021-12-06 19:20:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 158 states have (on average 1.4113924050632911) internal successors, (223), 161 states have internal predecessors, (223), 57 states have call successors, (57), 4 states have call predecessors, (57), 4 states have return successors, (57), 54 states have call predecessors, (57), 57 states have call successors, (57) [2021-12-06 19:20:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 337 transitions. [2021-12-06 19:20:37,657 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 337 transitions. Word has length 47 [2021-12-06 19:20:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:20:37,658 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 337 transitions. [2021-12-06 19:20:37,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 19:20:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 337 transitions. [2021-12-06 19:20:37,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 19:20:37,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:20:37,659 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:20:37,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:20:37,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 19:20:37,861 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:20:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:20:37,863 INFO L85 PathProgramCache]: Analyzing trace with hash 131088491, now seen corresponding path program 2 times [2021-12-06 19:20:37,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:20:37,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857237051] [2021-12-06 19:20:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:37,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:20:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:37,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:20:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:37,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:20:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:37,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:20:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:37,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:20:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:37,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:20:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:37,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:20:37,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857237051] [2021-12-06 19:20:37,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857237051] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:20:37,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574190175] [2021-12-06 19:20:37,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:20:37,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:37,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:20:37,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:20:37,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:20:38,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:20:38,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:20:38,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 19:20:38,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:20:38,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:20:38,071 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:20:38,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:20:38,090 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 19:20:38,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:20:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:38,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:20:38,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:20:38,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 19:20:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:38,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574190175] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:20:38,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:20:38,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-12-06 19:20:38,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52206323] [2021-12-06 19:20:38,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:20:38,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 19:20:38,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:20:38,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 19:20:38,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:20:38,229 INFO L87 Difference]: Start difference. First operand 220 states and 337 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 19:20:38,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:20:38,677 INFO L93 Difference]: Finished difference Result 1182 states and 1872 transitions. [2021-12-06 19:20:38,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 19:20:38,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 51 [2021-12-06 19:20:38,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:20:38,686 INFO L225 Difference]: With dead ends: 1182 [2021-12-06 19:20:38,687 INFO L226 Difference]: Without dead ends: 1180 [2021-12-06 19:20:38,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 106 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:20:38,689 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 95 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:20:38,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 479 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:20:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-12-06 19:20:38,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 481. [2021-12-06 19:20:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 346 states have (on average 1.4421965317919074) internal successors, (499), 349 states have internal predecessors, (499), 130 states have call successors, (130), 4 states have call predecessors, (130), 4 states have return successors, (130), 127 states have call predecessors, (130), 130 states have call successors, (130) [2021-12-06 19:20:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 759 transitions. [2021-12-06 19:20:38,748 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 759 transitions. Word has length 51 [2021-12-06 19:20:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:20:38,748 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 759 transitions. [2021-12-06 19:20:38,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 19:20:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 759 transitions. [2021-12-06 19:20:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 19:20:38,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:20:38,750 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:20:38,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:20:38,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:38,952 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:20:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:20:38,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2054316525, now seen corresponding path program 1 times [2021-12-06 19:20:38,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:20:38,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477309782] [2021-12-06 19:20:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:38,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:20:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:39,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:20:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:39,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:20:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:39,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:20:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:39,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:20:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:39,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:20:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:39,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:20:39,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477309782] [2021-12-06 19:20:39,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477309782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:20:39,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758056464] [2021-12-06 19:20:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:39,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:39,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:20:39,077 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:20:39,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:20:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:39,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 19:20:39,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:20:39,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:20:39,255 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:20:39,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:20:39,300 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 19:20:39,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 19:20:39,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:20:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 19:20:39,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:20:41,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:20:41,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 19:20:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:41,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758056464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:20:41,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:20:41,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-06 19:20:41,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604308363] [2021-12-06 19:20:41,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:20:41,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 19:20:41,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:20:41,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 19:20:41,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=471, Unknown=1, NotChecked=0, Total=552 [2021-12-06 19:20:41,649 INFO L87 Difference]: Start difference. First operand 481 states and 759 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 19:20:45,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:20:45,028 INFO L93 Difference]: Finished difference Result 1668 states and 2610 transitions. [2021-12-06 19:20:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 19:20:45,029 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 51 [2021-12-06 19:20:45,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:20:45,037 INFO L225 Difference]: With dead ends: 1668 [2021-12-06 19:20:45,037 INFO L226 Difference]: Without dead ends: 1666 [2021-12-06 19:20:45,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 95 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=592, Invalid=3312, Unknown=2, NotChecked=0, Total=3906 [2021-12-06 19:20:45,041 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 321 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 2175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:20:45,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 941 Invalid, 2175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 1471 Invalid, 0 Unknown, 149 Unchecked, 0.8s Time] [2021-12-06 19:20:45,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2021-12-06 19:20:45,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 573. [2021-12-06 19:20:45,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 408 states have (on average 1.4411764705882353) internal successors, (588), 415 states have internal predecessors, (588), 156 states have call successors, (156), 8 states have call predecessors, (156), 8 states have return successors, (156), 149 states have call predecessors, (156), 156 states have call successors, (156) [2021-12-06 19:20:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 900 transitions. [2021-12-06 19:20:45,104 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 900 transitions. Word has length 51 [2021-12-06 19:20:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:20:45,104 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 900 transitions. [2021-12-06 19:20:45,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 19:20:45,104 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 900 transitions. [2021-12-06 19:20:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 19:20:45,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:20:45,106 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:20:45,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:20:45,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:45,307 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:20:45,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:20:45,308 INFO L85 PathProgramCache]: Analyzing trace with hash 881708129, now seen corresponding path program 3 times [2021-12-06 19:20:45,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:20:45,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228135784] [2021-12-06 19:20:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:45,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:20:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:45,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:20:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:45,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:20:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:45,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:20:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:45,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:20:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:45,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:20:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:45,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:20:45,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228135784] [2021-12-06 19:20:45,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228135784] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:20:45,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013882652] [2021-12-06 19:20:45,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:20:45,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:45,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:20:45,468 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:20:45,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:20:45,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 19:20:45,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:20:45,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 19:20:45,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:20:45,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:20:45,581 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 19:20:45,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:20:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:45,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:20:45,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:20:45,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 19:20:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:45,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013882652] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:20:45,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:20:45,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2021-12-06 19:20:45,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755322041] [2021-12-06 19:20:45,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:20:45,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 19:20:45,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:20:45,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 19:20:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:20:45,766 INFO L87 Difference]: Start difference. First operand 573 states and 900 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-06 19:20:47,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:20:47,648 INFO L93 Difference]: Finished difference Result 6274 states and 10110 transitions. [2021-12-06 19:20:47,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 19:20:47,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 55 [2021-12-06 19:20:47,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:20:47,706 INFO L225 Difference]: With dead ends: 6274 [2021-12-06 19:20:47,706 INFO L226 Difference]: Without dead ends: 6272 [2021-12-06 19:20:47,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 106 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=684, Invalid=3606, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 19:20:47,715 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 356 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 3039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:20:47,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 1219 Invalid, 3039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 2058 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 19:20:47,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6272 states. [2021-12-06 19:20:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6272 to 1761. [2021-12-06 19:20:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1252 states have (on average 1.4712460063897763) internal successors, (1842), 1259 states have internal predecessors, (1842), 500 states have call successors, (500), 8 states have call predecessors, (500), 8 states have return successors, (500), 493 states have call predecessors, (500), 500 states have call successors, (500) [2021-12-06 19:20:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2842 transitions. [2021-12-06 19:20:47,942 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2842 transitions. Word has length 55 [2021-12-06 19:20:47,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:20:47,942 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 2842 transitions. [2021-12-06 19:20:47,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-06 19:20:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2842 transitions. [2021-12-06 19:20:47,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 19:20:47,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:20:47,945 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:20:47,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:20:48,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 19:20:48,146 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:20:48,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:20:48,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1022256739, now seen corresponding path program 1 times [2021-12-06 19:20:48,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:20:48,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136666166] [2021-12-06 19:20:48,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:48,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:20:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:48,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:20:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:48,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:20:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:48,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:20:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:48,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:20:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:48,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:20:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:48,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:20:48,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136666166] [2021-12-06 19:20:48,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136666166] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:20:48,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906082545] [2021-12-06 19:20:48,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:48,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:48,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:20:48,288 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:20:48,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:20:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:48,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 19:20:48,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:20:48,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:20:48,491 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 19:20:48,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 19:20:48,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:20:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 19:20:48,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:20:50,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:20:50,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 19:20:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:50,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906082545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:20:50,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:20:50,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 26 [2021-12-06 19:20:50,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950919419] [2021-12-06 19:20:50,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:20:50,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:20:50,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:20:50,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:20:50,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=566, Unknown=1, NotChecked=0, Total=650 [2021-12-06 19:20:50,840 INFO L87 Difference]: Start difference. First operand 1761 states and 2842 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 19:20:58,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:20:58,025 INFO L93 Difference]: Finished difference Result 6971 states and 11161 transitions. [2021-12-06 19:20:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-06 19:20:58,025 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 55 [2021-12-06 19:20:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:20:58,059 INFO L225 Difference]: With dead ends: 6971 [2021-12-06 19:20:58,059 INFO L226 Difference]: Without dead ends: 6969 [2021-12-06 19:20:58,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1034, Invalid=7335, Unknown=3, NotChecked=0, Total=8372 [2021-12-06 19:20:58,068 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 536 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 3341 mSolverCounterSat, 1121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1853 SdHoareTripleChecker+Invalid, 4796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1121 IncrementalHoareTripleChecker+Valid, 3341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:20:58,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 1853 Invalid, 4796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1121 Valid, 3341 Invalid, 0 Unknown, 334 Unchecked, 1.7s Time] [2021-12-06 19:20:58,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6969 states. [2021-12-06 19:20:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6969 to 2244. [2021-12-06 19:20:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 1592 states have (on average 1.4723618090452262) internal successors, (2344), 1599 states have internal predecessors, (2344), 635 states have call successors, (635), 16 states have call predecessors, (635), 16 states have return successors, (635), 628 states have call predecessors, (635), 635 states have call successors, (635) [2021-12-06 19:20:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 3614 transitions. [2021-12-06 19:20:58,355 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 3614 transitions. Word has length 55 [2021-12-06 19:20:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:20:58,356 INFO L470 AbstractCegarLoop]: Abstraction has 2244 states and 3614 transitions. [2021-12-06 19:20:58,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 19:20:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 3614 transitions. [2021-12-06 19:20:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 19:20:58,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:20:58,358 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:20:58,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 19:20:58,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:58,560 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:20:58,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:20:58,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1863871831, now seen corresponding path program 4 times [2021-12-06 19:20:58,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:20:58,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692505647] [2021-12-06 19:20:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:20:58,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:20:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:58,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:20:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:58,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:20:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:58,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:20:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:58,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:20:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:58,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:20:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:20:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:58,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:20:58,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692505647] [2021-12-06 19:20:58,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692505647] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:20:58,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238053201] [2021-12-06 19:20:58,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:20:58,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:20:58,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:20:58,751 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:20:58,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:20:58,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:20:58,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:20:58,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 19:20:58,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:20:58,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:20:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:58,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:20:58,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:20:58,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 19:20:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:20:59,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238053201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:20:59,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:20:59,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 16 [2021-12-06 19:20:59,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733968250] [2021-12-06 19:20:59,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:20:59,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 19:20:59,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:20:59,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 19:20:59,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:20:59,011 INFO L87 Difference]: Start difference. First operand 2244 states and 3614 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 19:21:02,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:21:02,506 INFO L93 Difference]: Finished difference Result 15802 states and 25506 transitions. [2021-12-06 19:21:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-06 19:21:02,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2021-12-06 19:21:02,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:21:02,563 INFO L225 Difference]: With dead ends: 15802 [2021-12-06 19:21:02,563 INFO L226 Difference]: Without dead ends: 15800 [2021-12-06 19:21:02,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=777, Invalid=6195, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 19:21:02,579 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 197 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 3863 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 4525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 3863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:21:02,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1777 Invalid, 4525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 3863 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 19:21:02,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15800 states. [2021-12-06 19:21:03,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15800 to 6203. [2021-12-06 19:21:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6203 states, 4394 states have (on average 1.4845243513882567) internal successors, (6523), 4394 states have internal predecessors, (6523), 1792 states have call successors, (1792), 16 states have call predecessors, (1792), 16 states have return successors, (1792), 1792 states have call predecessors, (1792), 1792 states have call successors, (1792) [2021-12-06 19:21:03,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6203 states to 6203 states and 10107 transitions. [2021-12-06 19:21:03,385 INFO L78 Accepts]: Start accepts. Automaton has 6203 states and 10107 transitions. Word has length 59 [2021-12-06 19:21:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:21:03,385 INFO L470 AbstractCegarLoop]: Abstraction has 6203 states and 10107 transitions. [2021-12-06 19:21:03,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 19:21:03,385 INFO L276 IsEmpty]: Start isEmpty. Operand 6203 states and 10107 transitions. [2021-12-06 19:21:03,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 19:21:03,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:21:03,391 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:21:03,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 19:21:03,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 19:21:03,592 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:21:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:21:03,593 INFO L85 PathProgramCache]: Analyzing trace with hash 58433497, now seen corresponding path program 1 times [2021-12-06 19:21:03,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:21:03,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557828294] [2021-12-06 19:21:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:21:03,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:21:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:03,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:21:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:03,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:21:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:03,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:21:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:03,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:21:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:03,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:21:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:21:03,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:21:03,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557828294] [2021-12-06 19:21:03,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557828294] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:21:03,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144199210] [2021-12-06 19:21:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:21:03,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:21:03,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:21:03,796 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:21:03,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:21:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 19:21:03,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:21:03,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:21:04,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:21:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:21:04,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:21:04,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:21:04,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 19:21:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:21:04,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144199210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:21:04,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:21:04,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2021-12-06 19:21:04,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350543872] [2021-12-06 19:21:04,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:21:04,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 19:21:04,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:21:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 19:21:04,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-12-06 19:21:04,313 INFO L87 Difference]: Start difference. First operand 6203 states and 10107 transitions. Second operand has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 29 states have internal predecessors, (112), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 19:21:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:21:12,148 INFO L93 Difference]: Finished difference Result 20042 states and 32227 transitions. [2021-12-06 19:21:12,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-12-06 19:21:12,149 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 29 states have internal predecessors, (112), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 59 [2021-12-06 19:21:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:21:12,191 INFO L225 Difference]: With dead ends: 20042 [2021-12-06 19:21:12,191 INFO L226 Difference]: Without dead ends: 20040 [2021-12-06 19:21:12,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11538 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4211, Invalid=26239, Unknown=0, NotChecked=0, Total=30450 [2021-12-06 19:21:12,204 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 839 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 5152 mSolverCounterSat, 2723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 7875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2723 IncrementalHoareTripleChecker+Valid, 5152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:21:12,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 1992 Invalid, 7875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2723 Valid, 5152 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 19:21:12,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20040 states. [2021-12-06 19:21:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20040 to 2292. [2021-12-06 19:21:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2292 states, 1640 states have (on average 1.4634146341463414) internal successors, (2400), 1647 states have internal predecessors, (2400), 635 states have call successors, (635), 16 states have call predecessors, (635), 16 states have return successors, (635), 628 states have call predecessors, (635), 635 states have call successors, (635) [2021-12-06 19:21:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2292 states to 2292 states and 3670 transitions. [2021-12-06 19:21:12,681 INFO L78 Accepts]: Start accepts. Automaton has 2292 states and 3670 transitions. Word has length 59 [2021-12-06 19:21:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:21:12,681 INFO L470 AbstractCegarLoop]: Abstraction has 2292 states and 3670 transitions. [2021-12-06 19:21:12,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 29 states have internal predecessors, (112), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 19:21:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2292 states and 3670 transitions. [2021-12-06 19:21:12,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 19:21:12,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:21:12,684 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:21:12,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 19:21:12,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:21:12,885 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:21:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:21:12,885 INFO L85 PathProgramCache]: Analyzing trace with hash 819831629, now seen corresponding path program 5 times [2021-12-06 19:21:12,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:21:12,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115575101] [2021-12-06 19:21:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:21:12,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:21:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:13,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:21:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:13,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:21:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:13,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:21:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:13,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:21:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:13,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:21:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:21:13,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:21:13,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115575101] [2021-12-06 19:21:13,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115575101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:21:13,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147082289] [2021-12-06 19:21:13,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:21:13,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:21:13,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:21:13,107 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:21:13,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:21:13,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 19:21:13,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:21:13,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 19:21:13,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:21:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:21:13,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:21:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:21:13,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147082289] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:21:13,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:21:13,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2021-12-06 19:21:13,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654912413] [2021-12-06 19:21:13,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:21:13,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 19:21:13,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:21:13,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 19:21:13,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:21:13,842 INFO L87 Difference]: Start difference. First operand 2292 states and 3670 transitions. Second operand has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 19:21:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:21:14,348 INFO L93 Difference]: Finished difference Result 2660 states and 4237 transitions. [2021-12-06 19:21:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:21:14,349 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 63 [2021-12-06 19:21:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:21:14,355 INFO L225 Difference]: With dead ends: 2660 [2021-12-06 19:21:14,355 INFO L226 Difference]: Without dead ends: 2632 [2021-12-06 19:21:14,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 19:21:14,356 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 231 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:21:14,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 158 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:21:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-12-06 19:21:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2325. [2021-12-06 19:21:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 1672 states have (on average 1.4545454545454546) internal successors, (2432), 1672 states have internal predecessors, (2432), 636 states have call successors, (636), 16 states have call predecessors, (636), 16 states have return successors, (636), 636 states have call predecessors, (636), 636 states have call successors, (636) [2021-12-06 19:21:14,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 3704 transitions. [2021-12-06 19:21:14,607 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 3704 transitions. Word has length 63 [2021-12-06 19:21:14,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:21:14,608 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 3704 transitions. [2021-12-06 19:21:14,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 19:21:14,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 3704 transitions. [2021-12-06 19:21:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 19:21:14,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:21:14,611 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:21:14,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:21:14,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:21:14,813 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:21:14,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:21:14,814 INFO L85 PathProgramCache]: Analyzing trace with hash 374578441, now seen corresponding path program 2 times [2021-12-06 19:21:14,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:21:14,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882728558] [2021-12-06 19:21:14,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:21:14,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:21:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:14,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:21:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:14,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:21:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:14,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:21:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:14,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:21:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:14,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:21:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:14,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:21:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:14,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:21:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:15,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 19:21:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:15,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:21:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:15,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:21:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:21:15,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:21:15,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882728558] [2021-12-06 19:21:15,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882728558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:21:15,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509261382] [2021-12-06 19:21:15,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:21:15,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:21:15,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:21:15,011 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:21:15,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:21:15,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:21:15,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:21:15,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 19:21:15,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:21:15,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:21:15,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:15,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:21:15,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:15,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:21:15,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:15,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:21:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:15,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:21:15,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:15,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:21:15,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:15,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:21:15,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:15,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:21:15,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:15,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:21:15,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:15,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:21:15,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:21:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 19:21:15,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:21:15,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509261382] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:21:15,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:21:15,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-12-06 19:21:15,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585842918] [2021-12-06 19:21:15,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:21:15,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 19:21:15,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:21:15,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 19:21:15,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:21:15,797 INFO L87 Difference]: Start difference. First operand 2325 states and 3704 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-06 19:21:16,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:21:16,768 INFO L93 Difference]: Finished difference Result 3368 states and 5313 transitions. [2021-12-06 19:21:16,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 19:21:16,769 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2021-12-06 19:21:16,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:21:16,780 INFO L225 Difference]: With dead ends: 3368 [2021-12-06 19:21:16,780 INFO L226 Difference]: Without dead ends: 3366 [2021-12-06 19:21:16,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 108 SyntacticMatches, 22 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 19:21:16,782 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 143 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:21:16,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 591 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 744 Invalid, 0 Unknown, 108 Unchecked, 0.4s Time] [2021-12-06 19:21:16,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2021-12-06 19:21:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 2291. [2021-12-06 19:21:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 1638 states have (on average 1.452991452991453) internal successors, (2380), 1646 states have internal predecessors, (2380), 635 states have call successors, (635), 17 states have call predecessors, (635), 17 states have return successors, (635), 627 states have call predecessors, (635), 635 states have call successors, (635) [2021-12-06 19:21:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3650 transitions. [2021-12-06 19:21:17,120 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3650 transitions. Word has length 75 [2021-12-06 19:21:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:21:17,120 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 3650 transitions. [2021-12-06 19:21:17,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-06 19:21:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3650 transitions. [2021-12-06 19:21:17,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 19:21:17,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:21:17,123 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:21:17,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 19:21:17,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 19:21:17,324 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:21:17,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:21:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1525924609, now seen corresponding path program 2 times [2021-12-06 19:21:17,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:21:17,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126176698] [2021-12-06 19:21:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:21:17,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:21:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:17,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:21:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:17,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:21:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:17,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:21:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:17,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:21:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:17,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:21:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:17,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:21:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:17,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:21:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:17,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 19:21:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:17,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:21:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:17,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:21:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:21:17,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:21:17,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126176698] [2021-12-06 19:21:17,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126176698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:21:17,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142108342] [2021-12-06 19:21:17,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:21:17,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:21:17,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:21:17,519 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:21:17,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 19:21:17,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:21:17,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:21:17,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 19:21:17,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:21:17,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:21:17,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:17,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:21:17,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:17,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:21:17,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:17,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:21:17,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:17,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:21:17,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:17,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:21:17,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:17,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:21:17,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:17,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:21:18,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:21:18,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:21:18,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:21:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-06 19:21:18,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:21:18,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142108342] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:21:18,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:21:18,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-06 19:21:18,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049349944] [2021-12-06 19:21:18,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:21:18,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:21:18,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:21:18,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:21:18,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:21:18,269 INFO L87 Difference]: Start difference. First operand 2291 states and 3650 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-06 19:21:19,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:21:19,189 INFO L93 Difference]: Finished difference Result 2477 states and 3901 transitions. [2021-12-06 19:21:19,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 19:21:19,190 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 79 [2021-12-06 19:21:19,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:21:19,195 INFO L225 Difference]: With dead ends: 2477 [2021-12-06 19:21:19,195 INFO L226 Difference]: Without dead ends: 2475 [2021-12-06 19:21:19,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 112 SyntacticMatches, 20 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 19:21:19,197 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 210 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:21:19,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 469 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 569 Invalid, 0 Unknown, 93 Unchecked, 0.3s Time] [2021-12-06 19:21:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2021-12-06 19:21:19,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 1639. [2021-12-06 19:21:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1168 states have (on average 1.44263698630137) internal successors, (1685), 1176 states have internal predecessors, (1685), 451 states have call successors, (451), 19 states have call predecessors, (451), 19 states have return successors, (451), 443 states have call predecessors, (451), 451 states have call successors, (451) [2021-12-06 19:21:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2587 transitions. [2021-12-06 19:21:19,478 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2587 transitions. Word has length 79 [2021-12-06 19:21:19,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:21:19,479 INFO L470 AbstractCegarLoop]: Abstraction has 1639 states and 2587 transitions. [2021-12-06 19:21:19,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-06 19:21:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2587 transitions. [2021-12-06 19:21:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 19:21:19,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:21:19,482 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:21:19,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 19:21:19,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 19:21:19,683 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:21:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:21:19,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1603227147, now seen corresponding path program 2 times [2021-12-06 19:21:19,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:21:19,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628382909] [2021-12-06 19:21:19,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:21:19,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:21:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:19,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:21:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:19,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:21:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:19,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:21:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:19,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:21:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:19,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:21:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:19,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:21:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:19,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:21:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:19,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 19:21:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:19,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:21:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:19,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:21:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:21:19,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:21:19,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628382909] [2021-12-06 19:21:19,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628382909] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:21:19,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308988661] [2021-12-06 19:21:19,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:21:19,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:21:19,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:21:19,834 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:21:19,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 19:21:19,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:21:19,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:21:19,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 19:21:19,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:21:19,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:21:20,034 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:21:20,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:21:20,076 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:21:20,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:21:20,141 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 19:21:20,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:21:20,185 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 19:21:20,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:21:20,226 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 19:21:20,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:21:20,267 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 19:21:20,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:21:20,309 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 19:21:20,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:21:20,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:21:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 63 proven. 27 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 19:21:20,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:21:22,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308988661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:21:22,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:21:22,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-06 19:21:22,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632882550] [2021-12-06 19:21:22,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:21:22,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 19:21:22,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:21:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 19:21:22,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=502, Unknown=1, NotChecked=0, Total=600 [2021-12-06 19:21:22,549 INFO L87 Difference]: Start difference. First operand 1639 states and 2587 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-06 19:21:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:21:23,319 INFO L93 Difference]: Finished difference Result 1763 states and 2745 transitions. [2021-12-06 19:21:23,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 19:21:23,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 83 [2021-12-06 19:21:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:21:23,323 INFO L225 Difference]: With dead ends: 1763 [2021-12-06 19:21:23,323 INFO L226 Difference]: Without dead ends: 1761 [2021-12-06 19:21:23,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 17 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=321, Invalid=1658, Unknown=1, NotChecked=0, Total=1980 [2021-12-06 19:21:23,324 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 184 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:21:23,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 426 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 585 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2021-12-06 19:21:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2021-12-06 19:21:23,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 659. [2021-12-06 19:21:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 472 states have (on average 1.4088983050847457) internal successors, (665), 478 states have internal predecessors, (665), 173 states have call successors, (173), 13 states have call predecessors, (173), 13 states have return successors, (173), 167 states have call predecessors, (173), 173 states have call successors, (173) [2021-12-06 19:21:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1011 transitions. [2021-12-06 19:21:23,520 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1011 transitions. Word has length 83 [2021-12-06 19:21:23,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:21:23,520 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1011 transitions. [2021-12-06 19:21:23,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-06 19:21:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1011 transitions. [2021-12-06 19:21:23,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 19:21:23,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:21:23,522 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:21:23,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 19:21:23,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 19:21:23,724 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:21:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:21:23,725 INFO L85 PathProgramCache]: Analyzing trace with hash -375078701, now seen corresponding path program 6 times [2021-12-06 19:21:23,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:21:23,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761415265] [2021-12-06 19:21:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:21:23,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:21:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:23,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:21:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:23,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:21:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:23,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:21:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:23,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:21:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:23,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:21:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:23,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:21:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:23,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:21:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:23,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 19:21:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:23,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:21:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:23,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:21:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:21:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:21:23,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:21:23,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761415265] [2021-12-06 19:21:23,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761415265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:21:23,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689311364] [2021-12-06 19:21:23,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:21:23,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:21:23,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:21:23,886 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:21:23,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 19:21:24,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 19:21:24,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:21:24,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 19:21:24,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:21:24,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:21:32,216 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:21:32,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:21:40,301 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:21:40,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:21:48,377 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:21:48,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:21:56,454 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 19:21:56,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:21:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 72 proven. 69 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 19:21:56,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:21:58,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 19:21:58,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 19:21:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:21:58,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689311364] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:21:58,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:21:58,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 26 [2021-12-06 19:21:58,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999579624] [2021-12-06 19:21:58,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:21:58,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:21:58,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:21:58,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:21:58,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=547, Unknown=5, NotChecked=0, Total=650 [2021-12-06 19:21:58,785 INFO L87 Difference]: Start difference. First operand 659 states and 1011 transitions. Second operand has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-06 19:22:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:18,111 INFO L93 Difference]: Finished difference Result 1705 states and 2677 transitions. [2021-12-06 19:22:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 19:22:18,112 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 95 [2021-12-06 19:22:18,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:18,116 INFO L225 Difference]: With dead ends: 1705 [2021-12-06 19:22:18,116 INFO L226 Difference]: Without dead ends: 1703 [2021-12-06 19:22:18,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 190 SyntacticMatches, 17 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 52.6s TimeCoverageRelationStatistics Valid=269, Invalid=1697, Unknown=14, NotChecked=0, Total=1980 [2021-12-06 19:22:18,117 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 174 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:18,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 866 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1253 Invalid, 0 Unknown, 160 Unchecked, 0.5s Time] [2021-12-06 19:22:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-12-06 19:22:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 782. [2021-12-06 19:22:18,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 561 states have (on average 1.4153297682709447) internal successors, (794), 567 states have internal predecessors, (794), 205 states have call successors, (205), 15 states have call predecessors, (205), 15 states have return successors, (205), 199 states have call predecessors, (205), 205 states have call successors, (205) [2021-12-06 19:22:18,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1204 transitions. [2021-12-06 19:22:18,369 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1204 transitions. Word has length 95 [2021-12-06 19:22:18,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:18,370 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1204 transitions. [2021-12-06 19:22:18,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-06 19:22:18,370 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1204 transitions. [2021-12-06 19:22:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 19:22:18,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:18,372 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:18,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 19:22:18,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:18,572 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:18,573 INFO L85 PathProgramCache]: Analyzing trace with hash -447465259, now seen corresponding path program 1 times [2021-12-06 19:22:18,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:18,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719790412] [2021-12-06 19:22:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:18,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:18,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:22:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:18,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:22:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:18,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:22:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:18,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:22:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:18,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:22:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:18,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:22:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:18,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:22:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:18,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 19:22:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:18,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:22:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:18,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:22:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:22:18,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:18,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719790412] [2021-12-06 19:22:18,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719790412] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:22:18,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772736186] [2021-12-06 19:22:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:18,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:18,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:18,710 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:18,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 19:22:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:18,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 19:22:18,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:18,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:22:18,859 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:22:18,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:22:18,882 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:22:18,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:22:18,908 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:22:18,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:22:18,935 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:22:18,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:22:19,095 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 19:22:19,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-06 19:22:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:22:19,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:22:19,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:22:19,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 19:22:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:22:19,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772736186] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:22:19,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:22:19,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 19 [2021-12-06 19:22:19,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229384376] [2021-12-06 19:22:19,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:22:19,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:22:19,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:19,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:22:19,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:22:19,282 INFO L87 Difference]: Start difference. First operand 782 states and 1204 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 4 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-06 19:22:30,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:22:30,938 INFO L93 Difference]: Finished difference Result 11894 states and 19145 transitions. [2021-12-06 19:22:30,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-12-06 19:22:30,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 4 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 95 [2021-12-06 19:22:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:22:30,958 INFO L225 Difference]: With dead ends: 11894 [2021-12-06 19:22:30,959 INFO L226 Difference]: Without dead ends: 11892 [2021-12-06 19:22:30,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 198 SyntacticMatches, 10 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12075 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2300, Invalid=26770, Unknown=0, NotChecked=0, Total=29070 [2021-12-06 19:22:30,963 INFO L933 BasicCegarLoop]: 831 mSDtfsCounter, 406 mSDsluCounter, 3048 mSDsCounter, 0 mSdLazyCounter, 9668 mSolverCounterSat, 1999 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 3879 SdHoareTripleChecker+Invalid, 11667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1999 IncrementalHoareTripleChecker+Valid, 9668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:22:30,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 3879 Invalid, 11667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1999 Valid, 9668 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-06 19:22:30,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11892 states. [2021-12-06 19:22:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11892 to 1645. [2021-12-06 19:22:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1170 states have (on average 1.452991452991453) internal successors, (1700), 1184 states have internal predecessors, (1700), 459 states have call successors, (459), 15 states have call predecessors, (459), 15 states have return successors, (459), 445 states have call predecessors, (459), 459 states have call successors, (459) [2021-12-06 19:22:31,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2618 transitions. [2021-12-06 19:22:31,726 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2618 transitions. Word has length 95 [2021-12-06 19:22:31,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:22:31,727 INFO L470 AbstractCegarLoop]: Abstraction has 1645 states and 2618 transitions. [2021-12-06 19:22:31,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 4 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-06 19:22:31,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2618 transitions. [2021-12-06 19:22:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 19:22:31,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:22:31,729 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:22:31,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 19:22:31,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 19:22:31,930 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:22:31,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:22:31,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1891302485, now seen corresponding path program 1 times [2021-12-06 19:22:31,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:22:31,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982418325] [2021-12-06 19:22:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:31,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:22:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:32,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:22:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:32,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:22:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:32,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:22:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:32,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:22:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:32,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:22:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:32,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:22:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:32,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:22:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:32,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 19:22:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:32,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:22:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:32,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:22:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:22:32,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:22:32,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982418325] [2021-12-06 19:22:32,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982418325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:22:32,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405696438] [2021-12-06 19:22:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:22:32,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:22:32,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:22:32,121 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:22:32,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 19:22:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:22:32,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 19:22:32,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:22:32,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:22:32,387 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:22:32,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:22:32,439 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:22:32,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:22:32,495 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:22:32,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:22:32,551 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 19:22:32,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 19:22:32,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:22:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 72 proven. 69 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 19:22:32,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:22:35,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:22:35,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 19:22:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:22:35,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405696438] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:22:35,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:22:35,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 36 [2021-12-06 19:22:35,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282874082] [2021-12-06 19:22:35,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:22:35,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 19:22:35,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:22:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 19:22:35,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1129, Unknown=1, NotChecked=0, Total=1260 [2021-12-06 19:22:35,138 INFO L87 Difference]: Start difference. First operand 1645 states and 2618 transitions. Second operand has 36 states, 36 states have (on average 4.5) internal successors, (162), 36 states have internal predecessors, (162), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-06 19:25:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:04,241 INFO L93 Difference]: Finished difference Result 10307 states and 16585 transitions. [2021-12-06 19:25:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-12-06 19:25:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.5) internal successors, (162), 36 states have internal predecessors, (162), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 95 [2021-12-06 19:25:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:04,256 INFO L225 Difference]: With dead ends: 10307 [2021-12-06 19:25:04,256 INFO L226 Difference]: Without dead ends: 10305 [2021-12-06 19:25:04,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 179 SyntacticMatches, 13 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15612 ImplicationChecksByTransitivity, 141.7s TimeCoverageRelationStatistics Valid=4685, Invalid=34250, Unknown=71, NotChecked=0, Total=39006 [2021-12-06 19:25:04,260 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 1943 mSDsluCounter, 2249 mSDsCounter, 0 mSdLazyCounter, 8090 mSolverCounterSat, 5838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 2746 SdHoareTripleChecker+Invalid, 14721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5838 IncrementalHoareTripleChecker+Valid, 8090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 793 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:04,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1964 Valid, 2746 Invalid, 14721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5838 Valid, 8090 Invalid, 0 Unknown, 793 Unchecked, 5.6s Time] [2021-12-06 19:25:04,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10305 states. [2021-12-06 19:25:05,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10305 to 1867. [2021-12-06 19:25:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1326 states have (on average 1.4555052790346907) internal successors, (1930), 1340 states have internal predecessors, (1930), 521 states have call successors, (521), 19 states have call predecessors, (521), 19 states have return successors, (521), 507 states have call predecessors, (521), 521 states have call successors, (521) [2021-12-06 19:25:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2972 transitions. [2021-12-06 19:25:05,099 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2972 transitions. Word has length 95 [2021-12-06 19:25:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:25:05,099 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 2972 transitions. [2021-12-06 19:25:05,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.5) internal successors, (162), 36 states have internal predecessors, (162), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-06 19:25:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2972 transitions. [2021-12-06 19:25:05,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 19:25:05,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:25:05,101 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:25:05,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 19:25:05,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:25:05,303 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:25:05,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:25:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash 500947145, now seen corresponding path program 7 times [2021-12-06 19:25:05,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:25:05,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422449420] [2021-12-06 19:25:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:05,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:25:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:05,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:25:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:05,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:25:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:05,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:25:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:05,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:25:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:05,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:25:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:05,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:25:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:05,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:25:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:05,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 19:25:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:05,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:25:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:05,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:25:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:25:05,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:25:05,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422449420] [2021-12-06 19:25:05,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422449420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:25:05,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262790258] [2021-12-06 19:25:05,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:25:05,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:25:05,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:25:05,472 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:25:05,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 19:25:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:05,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 19:25:05,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:25:05,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:25:05,631 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:25:05,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:25:05,651 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:25:05,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:25:05,673 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:25:05,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:25:05,825 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 19:25:05,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-06 19:25:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:25:05,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:25:05,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:25:05,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 19:25:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:25:05,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262790258] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:25:05,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:25:05,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2021-12-06 19:25:05,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960140814] [2021-12-06 19:25:05,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:25:05,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 19:25:05,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:25:05,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 19:25:05,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:25:05,978 INFO L87 Difference]: Start difference. First operand 1867 states and 2972 transitions. Second operand has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 19:25:34,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:25:34,321 INFO L93 Difference]: Finished difference Result 33501 states and 54285 transitions. [2021-12-06 19:25:34,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 320 states. [2021-12-06 19:25:34,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 99 [2021-12-06 19:25:34,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:25:34,376 INFO L225 Difference]: With dead ends: 33501 [2021-12-06 19:25:34,376 INFO L226 Difference]: Without dead ends: 33499 [2021-12-06 19:25:34,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 205 SyntacticMatches, 9 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46154 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6241, Invalid=97121, Unknown=0, NotChecked=0, Total=103362 [2021-12-06 19:25:34,388 INFO L933 BasicCegarLoop]: 1305 mSDtfsCounter, 607 mSDsluCounter, 5770 mSDsCounter, 0 mSdLazyCounter, 17540 mSolverCounterSat, 3516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 7075 SdHoareTripleChecker+Invalid, 21056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3516 IncrementalHoareTripleChecker+Valid, 17540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:25:34,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 7075 Invalid, 21056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3516 Valid, 17540 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2021-12-06 19:25:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33499 states. [2021-12-06 19:25:36,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33499 to 4595. [2021-12-06 19:25:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 3270 states have (on average 1.4752293577981652) internal successors, (4824), 3284 states have internal predecessors, (4824), 1305 states have call successors, (1305), 19 states have call predecessors, (1305), 19 states have return successors, (1305), 1291 states have call predecessors, (1305), 1305 states have call successors, (1305) [2021-12-06 19:25:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 7434 transitions. [2021-12-06 19:25:36,807 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 7434 transitions. Word has length 99 [2021-12-06 19:25:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:25:36,807 INFO L470 AbstractCegarLoop]: Abstraction has 4595 states and 7434 transitions. [2021-12-06 19:25:36,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 19:25:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 7434 transitions. [2021-12-06 19:25:36,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 19:25:36,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:25:36,811 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:25:36,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 19:25:37,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:25:37,011 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:25:37,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:25:37,012 INFO L85 PathProgramCache]: Analyzing trace with hash 485428427, now seen corresponding path program 1 times [2021-12-06 19:25:37,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:25:37,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685895086] [2021-12-06 19:25:37,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:37,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:25:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:37,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:25:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:37,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:25:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:37,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:25:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:37,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:25:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:37,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:25:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:37,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:25:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:37,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:25:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:37,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 19:25:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:37,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:25:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:37,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:25:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:25:37,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:25:37,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685895086] [2021-12-06 19:25:37,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685895086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:25:37,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923787653] [2021-12-06 19:25:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:25:37,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:25:37,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:25:37,161 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:25:37,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 19:25:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:25:37,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 19:25:37,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:25:37,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:25:37,454 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:25:37,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:25:37,502 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:25:37,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:25:37,550 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 19:25:37,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 19:25:37,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:25:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 63 proven. 91 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 19:25:37,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:25:40,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:25:40,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 19:25:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:25:40,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923787653] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:25:40,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:25:40,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 39 [2021-12-06 19:25:40,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418402336] [2021-12-06 19:25:40,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:25:40,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 19:25:40,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:25:40,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 19:25:40,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1338, Unknown=1, NotChecked=0, Total=1482 [2021-12-06 19:25:40,169 INFO L87 Difference]: Start difference. First operand 4595 states and 7434 transitions. Second operand has 39 states, 39 states have (on average 4.461538461538462) internal successors, (174), 39 states have internal predecessors, (174), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-06 19:30:45,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:45,266 INFO L93 Difference]: Finished difference Result 44633 states and 72510 transitions. [2021-12-06 19:30:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2021-12-06 19:30:45,267 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.461538461538462) internal successors, (174), 39 states have internal predecessors, (174), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 99 [2021-12-06 19:30:45,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:45,345 INFO L225 Difference]: With dead ends: 44633 [2021-12-06 19:30:45,345 INFO L226 Difference]: Without dead ends: 44631 [2021-12-06 19:30:45,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42617 ImplicationChecksByTransitivity, 277.6s TimeCoverageRelationStatistics Valid=10261, Invalid=86011, Unknown=138, NotChecked=0, Total=96410 [2021-12-06 19:30:45,357 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 2007 mSDsluCounter, 4405 mSDsCounter, 0 mSdLazyCounter, 16085 mSolverCounterSat, 7622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2013 SdHoareTripleChecker+Valid, 5183 SdHoareTripleChecker+Invalid, 25072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7622 IncrementalHoareTripleChecker+Valid, 16085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1365 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:45,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2013 Valid, 5183 Invalid, 25072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7622 Valid, 16085 Invalid, 0 Unknown, 1365 Unchecked, 9.9s Time] [2021-12-06 19:30:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44631 states. [2021-12-06 19:30:48,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44631 to 4705. [2021-12-06 19:30:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4705 states, 3346 states have (on average 1.474596533173939) internal successors, (4934), 3364 states have internal predecessors, (4934), 1335 states have call successors, (1335), 23 states have call predecessors, (1335), 23 states have return successors, (1335), 1317 states have call predecessors, (1335), 1335 states have call successors, (1335) [2021-12-06 19:30:48,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4705 states to 4705 states and 7604 transitions. [2021-12-06 19:30:48,220 INFO L78 Accepts]: Start accepts. Automaton has 4705 states and 7604 transitions. Word has length 99 [2021-12-06 19:30:48,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:48,221 INFO L470 AbstractCegarLoop]: Abstraction has 4705 states and 7604 transitions. [2021-12-06 19:30:48,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.461538461538462) internal successors, (174), 39 states have internal predecessors, (174), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-06 19:30:48,221 INFO L276 IsEmpty]: Start isEmpty. Operand 4705 states and 7604 transitions. [2021-12-06 19:30:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 19:30:48,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:48,225 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:48,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-06 19:30:48,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:30:48,426 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:30:48,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:48,426 INFO L85 PathProgramCache]: Analyzing trace with hash -161867377, now seen corresponding path program 1 times [2021-12-06 19:30:48,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:30:48,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231800481] [2021-12-06 19:30:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:48,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:30:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:30:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:30:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:30:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:30:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:30:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:30:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:30:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 19:30:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:30:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:30:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 19:30:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 19:30:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 19:30:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 19:30:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 19:30:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-12-06 19:30:48,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:30:48,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231800481] [2021-12-06 19:30:48,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231800481] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:30:48,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619156419] [2021-12-06 19:30:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:48,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:30:48,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:30:48,681 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:30:48,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 19:30:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:48,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 19:30:48,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:48,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:30:48,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:48,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:30:48,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:48,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:30:48,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:48,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:30:49,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:49,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:30:49,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:49,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:30:49,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:49,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:30:49,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:49,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:30:49,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:49,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:30:49,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:49,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:30:49,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:49,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:30:49,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:49,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:30:49,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:49,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:30:49,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:49,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:30:49,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:49,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:30:49,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:30:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 58 proven. 38 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-12-06 19:30:49,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:30:49,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619156419] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:30:49,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:30:49,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-12-06 19:30:49,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353869551] [2021-12-06 19:30:49,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:30:49,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:30:49,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:30:49,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:30:49,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:30:49,740 INFO L87 Difference]: Start difference. First operand 4705 states and 7604 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-06 19:30:52,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:52,706 INFO L93 Difference]: Finished difference Result 4900 states and 7802 transitions. [2021-12-06 19:30:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 19:30:52,707 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 107 [2021-12-06 19:30:52,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:52,713 INFO L225 Difference]: With dead ends: 4900 [2021-12-06 19:30:52,713 INFO L226 Difference]: Without dead ends: 4898 [2021-12-06 19:30:52,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 146 SyntacticMatches, 32 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=1510, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 19:30:52,715 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 155 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:52,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 537 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 743 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2021-12-06 19:30:52,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-12-06 19:30:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2741. [2021-12-06 19:30:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 1954 states have (on average 1.458546571136131) internal successors, (2850), 1968 states have internal predecessors, (2850), 761 states have call successors, (761), 25 states have call predecessors, (761), 25 states have return successors, (761), 747 states have call predecessors, (761), 761 states have call successors, (761) [2021-12-06 19:30:54,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 4372 transitions. [2021-12-06 19:30:54,450 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 4372 transitions. Word has length 107 [2021-12-06 19:30:54,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:54,450 INFO L470 AbstractCegarLoop]: Abstraction has 2741 states and 4372 transitions. [2021-12-06 19:30:54,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-06 19:30:54,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 4372 transitions. [2021-12-06 19:30:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 19:30:54,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:54,453 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:54,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 19:30:54,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:30:54,654 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:30:54,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:54,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1338374721, now seen corresponding path program 8 times [2021-12-06 19:30:54,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:30:54,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147597241] [2021-12-06 19:30:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:54,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:30:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:54,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:30:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:54,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:30:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:54,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:30:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:54,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:30:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:54,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:30:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:54,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:30:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:54,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:30:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:54,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 19:30:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:54,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:30:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:54,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:30:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:30:54,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:30:54,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147597241] [2021-12-06 19:30:54,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147597241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:30:54,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446287462] [2021-12-06 19:30:54,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:30:54,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:30:54,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:30:54,810 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:30:54,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 19:30:54,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:30:54,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:30:54,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 19:30:54,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:54,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:30:54,973 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:30:54,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:30:54,997 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:30:54,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:30:55,195 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 19:30:55,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-06 19:30:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:30:55,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:30:55,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:30:55,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 19:30:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:30:55,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446287462] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:30:55,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:30:55,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 23 [2021-12-06 19:30:55,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300044830] [2021-12-06 19:30:55,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:30:55,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 19:30:55,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:30:55,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 19:30:55,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:30:55,358 INFO L87 Difference]: Start difference. First operand 2741 states and 4372 transitions. Second operand has 23 states, 23 states have (on average 4.565217391304348) internal successors, (105), 23 states have internal predecessors, (105), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 19:32:34,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:32:34,720 INFO L93 Difference]: Finished difference Result 89510 states and 145447 transitions. [2021-12-06 19:32:34,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 750 states. [2021-12-06 19:32:34,721 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.565217391304348) internal successors, (105), 23 states have internal predecessors, (105), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2021-12-06 19:32:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:32:34,903 INFO L225 Difference]: With dead ends: 89510 [2021-12-06 19:32:34,903 INFO L226 Difference]: Without dead ends: 89508 [2021-12-06 19:32:34,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 212 SyntacticMatches, 8 SemanticMatches, 750 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268486 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=23193, Invalid=541559, Unknown=0, NotChecked=0, Total=564752 [2021-12-06 19:32:34,949 INFO L933 BasicCegarLoop]: 2724 mSDtfsCounter, 995 mSDsluCounter, 8830 mSDsCounter, 0 mSdLazyCounter, 37706 mSolverCounterSat, 10151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 11554 SdHoareTripleChecker+Invalid, 47857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10151 IncrementalHoareTripleChecker+Valid, 37706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:32:34,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1060 Valid, 11554 Invalid, 47857 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10151 Valid, 37706 Invalid, 0 Unknown, 0 Unchecked, 21.9s Time] [2021-12-06 19:32:35,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89508 states. [2021-12-06 19:32:42,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89508 to 8573. [2021-12-06 19:32:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8573 states, 6096 states have (on average 1.4791666666666667) internal successors, (9017), 6110 states have internal predecessors, (9017), 2451 states have call successors, (2451), 25 states have call predecessors, (2451), 25 states have return successors, (2451), 2437 states have call predecessors, (2451), 2451 states have call successors, (2451) [2021-12-06 19:32:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8573 states to 8573 states and 13919 transitions. [2021-12-06 19:32:42,636 INFO L78 Accepts]: Start accepts. Automaton has 8573 states and 13919 transitions. Word has length 103 [2021-12-06 19:32:42,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:32:42,637 INFO L470 AbstractCegarLoop]: Abstraction has 8573 states and 13919 transitions. [2021-12-06 19:32:42,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.565217391304348) internal successors, (105), 23 states have internal predecessors, (105), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 19:32:42,637 INFO L276 IsEmpty]: Start isEmpty. Operand 8573 states and 13919 transitions. [2021-12-06 19:32:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 19:32:42,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:32:42,643 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:32:42,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 19:32:42,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 19:32:42,845 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:32:42,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:32:42,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1691463103, now seen corresponding path program 1 times [2021-12-06 19:32:42,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:32:42,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727260858] [2021-12-06 19:32:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:32:42,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:32:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:43,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:32:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:43,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:32:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:43,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:32:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:43,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 19:32:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:43,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:32:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:43,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:32:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:43,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:32:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:43,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 19:32:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:43,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:32:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:43,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:32:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:32:43,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:32:43,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727260858] [2021-12-06 19:32:43,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727260858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:32:43,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362582706] [2021-12-06 19:32:43,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:32:43,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:32:43,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:32:43,038 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:32:43,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172fff76-c65d-4003-b1b6-52078a02246c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 19:32:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:43,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 19:32:43,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:32:43,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:32:43,324 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:32:43,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:32:43,376 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 19:32:43,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 19:32:43,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:32:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 48 proven. 117 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-06 19:32:43,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:32:45,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:32:45,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 19:32:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 19:32:46,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362582706] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:32:46,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:32:46,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2021-12-06 19:32:46,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697997350] [2021-12-06 19:32:46,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:32:46,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 19:32:46,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:32:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 19:32:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1555, Unknown=1, NotChecked=0, Total=1722 [2021-12-06 19:32:46,020 INFO L87 Difference]: Start difference. First operand 8573 states and 13919 transitions. Second operand has 42 states, 42 states have (on average 4.428571428571429) internal successors, (186), 42 states have internal predecessors, (186), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30)