./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/MultCommutative-2.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_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/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_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/MultCommutative-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/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_4930c1dd-4be6-45b7-aa66-4a43dc153197/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 ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:45:01,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:45:01,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:45:01,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:45:01,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:45:01,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:45:01,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:45:01,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:45:01,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:45:01,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:45:01,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:45:01,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:45:01,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:45:01,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:45:01,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:45:01,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:45:01,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:45:01,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:45:01,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:45:01,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:45:01,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:45:01,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:45:01,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:45:01,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:45:01,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:45:01,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:45:01,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:45:01,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:45:01,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:45:01,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:45:01,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:45:01,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:45:01,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:45:01,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:45:01,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:45:01,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:45:01,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:45:01,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:45:01,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:45:01,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:45:01,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:45:01,502 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:45:01,525 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:45:01,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:45:01,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:45:01,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:45:01,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:45:01,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:45:01,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:45:01,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:45:01,527 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:45:01,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:45:01,527 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:45:01,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:45:01,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:45:01,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:45:01,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:45:01,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:45:01,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:45:01,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:45:01,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:45:01,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:45:01,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:45:01,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:45:01,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:45:01,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:45:01,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:45:01,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:45:01,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:45:01,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:45:01,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:45:01,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:45:01,531 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:45:01,531 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:45:01,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:45:01,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:45:01,532 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_4930c1dd-4be6-45b7-aa66-4a43dc153197/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2021-12-06 17:45:01,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:45:01,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:45:01,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:45:01,752 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:45:01,753 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:45:01,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/recursive/MultCommutative-2.c [2021-12-06 17:45:01,798 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/data/247ca0eb0/c81adbcf511a4e18a396a8de8e777d5d/FLAGa145623ef [2021-12-06 17:45:02,154 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:45:02,154 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/sv-benchmarks/c/recursive/MultCommutative-2.c [2021-12-06 17:45:02,159 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/data/247ca0eb0/c81adbcf511a4e18a396a8de8e777d5d/FLAGa145623ef [2021-12-06 17:45:02,171 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/data/247ca0eb0/c81adbcf511a4e18a396a8de8e777d5d [2021-12-06 17:45:02,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:45:02,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:45:02,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:45:02,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:45:02,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:45:02,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:45:02" (1/1) ... [2021-12-06 17:45:02,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b96b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:45:02, skipping insertion in model container [2021-12-06 17:45:02,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:45:02" (1/1) ... [2021-12-06 17:45:02,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:45:02,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:45:02,312 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_4930c1dd-4be6-45b7-aa66-4a43dc153197/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2021-12-06 17:45:02,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:45:02,320 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:45:02,331 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_4930c1dd-4be6-45b7-aa66-4a43dc153197/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2021-12-06 17:45:02,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:45:02,341 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:45:02,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:45:02 WrapperNode [2021-12-06 17:45:02,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:45:02,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:45:02,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:45:02,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:45:02,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:45:02" (1/1) ... [2021-12-06 17:45:02,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:45:02" (1/1) ... [2021-12-06 17:45:02,364 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2021-12-06 17:45:02,364 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:45:02,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:45:02,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:45:02,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:45:02,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:45:02" (1/1) ... [2021-12-06 17:45:02,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:45:02" (1/1) ... [2021-12-06 17:45:02,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:45:02" (1/1) ... [2021-12-06 17:45:02,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:45:02" (1/1) ... [2021-12-06 17:45:02,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:45:02" (1/1) ... [2021-12-06 17:45:02,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:45:02" (1/1) ... [2021-12-06 17:45:02,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:45:02" (1/1) ... [2021-12-06 17:45:02,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:45:02,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:45:02,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:45:02,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:45:02,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:45:02" (1/1) ... [2021-12-06 17:45:02,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:45:02,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:02,401 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:45:02,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:45:02,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:45:02,430 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2021-12-06 17:45:02,430 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2021-12-06 17:45:02,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:45:02,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:45:02,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:45:02,474 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:45:02,475 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:45:02,551 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:45:02,556 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:45:02,556 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 17:45:02,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:45:02 BoogieIcfgContainer [2021-12-06 17:45:02,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:45:02,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:45:02,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:45:02,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:45:02,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:45:02" (1/3) ... [2021-12-06 17:45:02,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aff6661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:45:02, skipping insertion in model container [2021-12-06 17:45:02,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:45:02" (2/3) ... [2021-12-06 17:45:02,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aff6661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:45:02, skipping insertion in model container [2021-12-06 17:45:02,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:45:02" (3/3) ... [2021-12-06 17:45:02,563 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2021-12-06 17:45:02,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:45:02,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:45:02,602 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:45:02,607 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 17:45:02,607 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:45:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:45:02,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:45:02,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:02,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:02,624 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:45:02,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:02,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1513944532, now seen corresponding path program 1 times [2021-12-06 17:45:02,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:02,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391509219] [2021-12-06 17:45:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:02,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:02,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:45:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:02,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 17:45:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:45:02,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391509219] [2021-12-06 17:45:02,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391509219] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:45:02,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:45:02,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:45:02,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758865653] [2021-12-06 17:45:02,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:45:02,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:45:02,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:02,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:45:02,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:45:02,880 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 17:45:02,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:02,944 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2021-12-06 17:45:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:45:02,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-12-06 17:45:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:02,952 INFO L225 Difference]: With dead ends: 44 [2021-12-06 17:45:02,952 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 17:45:02,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:45:02,957 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:02,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 156 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:45:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 17:45:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-12-06 17:45:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-06 17:45:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2021-12-06 17:45:02,989 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 20 [2021-12-06 17:45:02,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:02,989 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2021-12-06 17:45:02,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 17:45:02,989 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2021-12-06 17:45:02,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 17:45:02,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:02,991 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:02,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:45:02,992 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:45:02,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:02,992 INFO L85 PathProgramCache]: Analyzing trace with hash 555960324, now seen corresponding path program 1 times [2021-12-06 17:45:02,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:02,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337093888] [2021-12-06 17:45:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:02,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:03,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:45:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:03,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 17:45:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:03,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:45:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:45:03,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:03,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337093888] [2021-12-06 17:45:03,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337093888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:03,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530940821] [2021-12-06 17:45:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:03,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:03,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:03,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:03,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:45:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:03,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:45:03,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:45:03,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:45:03,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530940821] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:03,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:45:03,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2021-12-06 17:45:03,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881193233] [2021-12-06 17:45:03,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:03,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:45:03,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:03,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:45:03,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:45:03,331 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:45:03,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:03,460 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2021-12-06 17:45:03,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:45:03,461 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 26 [2021-12-06 17:45:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:03,462 INFO L225 Difference]: With dead ends: 52 [2021-12-06 17:45:03,462 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 17:45:03,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:45:03,464 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:03,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 121 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:45:03,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 17:45:03,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-12-06 17:45:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 17:45:03,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-12-06 17:45:03,470 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 26 [2021-12-06 17:45:03,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:03,470 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-06 17:45:03,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:45:03,470 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-12-06 17:45:03,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 17:45:03,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:03,472 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:03,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:45:03,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-06 17:45:03,674 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:45:03,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:03,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2011031750, now seen corresponding path program 1 times [2021-12-06 17:45:03,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:03,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262706572] [2021-12-06 17:45:03,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:03,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:03,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:45:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:03,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:03,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:45:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:45:03,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:03,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262706572] [2021-12-06 17:45:03,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262706572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:45:03,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:45:03,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:45:03,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199773427] [2021-12-06 17:45:03,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:45:03,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:45:03,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:03,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:45:03,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:45:03,853 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:45:03,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:03,884 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-12-06 17:45:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:45:03,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2021-12-06 17:45:03,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:03,886 INFO L225 Difference]: With dead ends: 31 [2021-12-06 17:45:03,886 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 17:45:03,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:45:03,888 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:03,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 45 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:45:03,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 17:45:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-06 17:45:03,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 17:45:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-06 17:45:03,895 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 27 [2021-12-06 17:45:03,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:03,896 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-06 17:45:03,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:45:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-06 17:45:03,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 17:45:03,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:03,898 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:03,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:45:03,898 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:45:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:03,899 INFO L85 PathProgramCache]: Analyzing trace with hash -760266050, now seen corresponding path program 2 times [2021-12-06 17:45:03,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:03,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489929455] [2021-12-06 17:45:03,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:03,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:03,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:45:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:04,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:04,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:45:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:04,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:45:04,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:04,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489929455] [2021-12-06 17:45:04,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489929455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:04,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402096067] [2021-12-06 17:45:04,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:45:04,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:04,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:04,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:45:04,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:45:04,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:04,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 17:45:04,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:45:04,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:45:05,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402096067] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:05,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:45:05,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 14] total 35 [2021-12-06 17:45:05,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728532034] [2021-12-06 17:45:05,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:05,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 17:45:05,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:05,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 17:45:05,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 17:45:05,134 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2021-12-06 17:45:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:05,462 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-12-06 17:45:05,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:45:05,462 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 34 [2021-12-06 17:45:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:05,463 INFO L225 Difference]: With dead ends: 40 [2021-12-06 17:45:05,464 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 17:45:05,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 17:45:05,465 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:05,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 202 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:45:05,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 17:45:05,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-12-06 17:45:05,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-06 17:45:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-12-06 17:45:05,473 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 34 [2021-12-06 17:45:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:05,473 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-12-06 17:45:05,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2021-12-06 17:45:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-12-06 17:45:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 17:45:05,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:05,475 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:05,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:45:05,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:05,677 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:45:05,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash -757286924, now seen corresponding path program 1 times [2021-12-06 17:45:05,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:05,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368050374] [2021-12-06 17:45:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:05,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:05,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:45:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:05,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:05,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:45:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:05,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:05,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:45:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:05,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 17:45:05,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:05,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368050374] [2021-12-06 17:45:05,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368050374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:05,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463271126] [2021-12-06 17:45:05,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:05,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:05,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:05,863 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:05,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:45:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:05,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:45:05,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-06 17:45:05,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 17:45:06,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463271126] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:06,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:45:06,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2021-12-06 17:45:06,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250538642] [2021-12-06 17:45:06,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:06,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:45:06,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:06,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:45:06,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:45:06,072 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 17:45:06,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:06,117 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-12-06 17:45:06,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:45:06,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 47 [2021-12-06 17:45:06,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:06,119 INFO L225 Difference]: With dead ends: 54 [2021-12-06 17:45:06,119 INFO L226 Difference]: Without dead ends: 25 [2021-12-06 17:45:06,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:45:06,121 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:06,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:45:06,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-06 17:45:06,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-06 17:45:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 17:45:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-12-06 17:45:06,128 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 47 [2021-12-06 17:45:06,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:06,128 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-12-06 17:45:06,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 17:45:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-12-06 17:45:06,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:45:06,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:06,130 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:06,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:45:06,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:06,332 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:45:06,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:06,333 INFO L85 PathProgramCache]: Analyzing trace with hash -983670890, now seen corresponding path program 3 times [2021-12-06 17:45:06,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:06,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653559339] [2021-12-06 17:45:06,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:06,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:06,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:45:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:06,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:06,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:45:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:06,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:06,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 17:45:06,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:06,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653559339] [2021-12-06 17:45:06,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653559339] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:06,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229459] [2021-12-06 17:45:06,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:45:06,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:06,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:06,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:06,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:45:06,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 17:45:06,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:06,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 17:45:06,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 17:45:07,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:45:08,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229459] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:08,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:45:08,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 20] total 49 [2021-12-06 17:45:08,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067204076] [2021-12-06 17:45:08,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:08,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 17:45:08,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:08,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 17:45:08,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 17:45:08,088 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 49 states, 45 states have (on average 1.511111111111111) internal successors, (68), 34 states have internal predecessors, (68), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (15), 15 states have call predecessors, (15), 10 states have call successors, (15) [2021-12-06 17:45:08,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:08,896 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-12-06 17:45:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 17:45:08,896 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 45 states have (on average 1.511111111111111) internal successors, (68), 34 states have internal predecessors, (68), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (15), 15 states have call predecessors, (15), 10 states have call successors, (15) Word has length 41 [2021-12-06 17:45:08,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:08,897 INFO L225 Difference]: With dead ends: 59 [2021-12-06 17:45:08,898 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 17:45:08,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=497, Invalid=3925, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 17:45:08,900 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:08,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 294 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:45:08,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 17:45:08,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2021-12-06 17:45:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 17:45:08,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2021-12-06 17:45:08,907 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 41 [2021-12-06 17:45:08,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:08,908 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2021-12-06 17:45:08,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 45 states have (on average 1.511111111111111) internal successors, (68), 34 states have internal predecessors, (68), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (15), 15 states have call predecessors, (15), 10 states have call successors, (15) [2021-12-06 17:45:08,908 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2021-12-06 17:45:08,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 17:45:08,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:08,909 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:08,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:45:09,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:09,111 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:45:09,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:09,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1241549144, now seen corresponding path program 4 times [2021-12-06 17:45:09,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:09,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000600174] [2021-12-06 17:45:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:09,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:09,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:45:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:09,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:09,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:09,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:45:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:09,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:09,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:09,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 17:45:09,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:09,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000600174] [2021-12-06 17:45:09,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000600174] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:09,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750166260] [2021-12-06 17:45:09,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:45:09,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:09,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:09,502 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:09,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:45:09,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:45:09,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:09,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-06 17:45:09,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 17:45:09,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:14,053 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |c_mult_#in~m|) (forall ((v_mult_~n_BEFORE_CALL_20 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_20_90| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121| Int)) (let ((.cse3 (* 3 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145|))) (let ((.cse1 (* 3 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121|)) (.cse0 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| |c_mult_#res| .cse3)) (.cse2 (div (+ (- 1) (* v_mult_~n_BEFORE_CALL_20 2) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| (- 6)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| (- 2))) (- 3))) (.cse4 (div (+ (- 1) (* v_mult_~n_BEFORE_CALL_20 (- 2)) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| 6) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| 2)) 3))) (or (< .cse0 .cse1) (< (+ |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| 1) .cse2) (<= .cse2 (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121| 1)) (< (* 3 |aux_div_v_mult_#in~n_BEFORE_CALL_20_90|) (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| .cse3)) (< (+ .cse4 1) |aux_div_v_mult_#in~n_BEFORE_CALL_20_90|) (<= (+ .cse1 3) .cse0) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| 0) (< .cse2 (+ 2 .cse4)))))) (forall ((v_mult_~n_BEFORE_CALL_20 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_20_90| Int)) (let ((.cse6 (div (+ (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| 6) (- 1) (* v_mult_~n_BEFORE_CALL_20 (- 2)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| (- 2)) (* |c_mult_#res| (- 2))) 3))) (let ((.cse5 (div (+ (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| (- 6)) (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| 2) (* v_mult_~n_BEFORE_CALL_20 2) (* |c_mult_#res| 2)) (- 3))) (.cse8 (* 3 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163|)) (.cse7 (+ .cse6 1))) (or (< .cse5 (+ 2 .cse6)) (<= 3 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163|) (<= |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| .cse7) (< (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| |c_mult_#res| (* 3 |aux_div_v_mult_#in~n_BEFORE_CALL_20_90|)) .cse8) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| 0) (< (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109| 1) .cse5) (< .cse8 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| |c_mult_#res| (* 3 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109|))) (< .cse7 |aux_div_v_mult_#in~n_BEFORE_CALL_20_90|))))) (<= |c_mult_#in~m| 0)) is different from false [2021-12-06 17:45:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 70 refuted. 0 times theorem prover too weak. 23 trivial. 12 not checked. [2021-12-06 17:45:14,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750166260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:14,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:45:14,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 25] total 51 [2021-12-06 17:45:14,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288783646] [2021-12-06 17:45:14,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:14,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 17:45:14,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:14,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 17:45:14,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2269, Unknown=1, NotChecked=96, Total=2550 [2021-12-06 17:45:14,442 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 51 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-06 17:45:15,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:15,467 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2021-12-06 17:45:15,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 17:45:15,468 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) Word has length 55 [2021-12-06 17:45:15,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:15,469 INFO L225 Difference]: With dead ends: 70 [2021-12-06 17:45:15,469 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 17:45:15,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=539, Invalid=4720, Unknown=1, NotChecked=142, Total=5402 [2021-12-06 17:45:15,471 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:15,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 313 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1009 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2021-12-06 17:45:15,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 17:45:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2021-12-06 17:45:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (21), 11 states have call predecessors, (21), 7 states have call successors, (21) [2021-12-06 17:45:15,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2021-12-06 17:45:15,478 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 55 [2021-12-06 17:45:15,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:15,479 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2021-12-06 17:45:15,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-06 17:45:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2021-12-06 17:45:15,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 17:45:15,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:15,480 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:15,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:45:15,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 17:45:15,682 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:45:15,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:15,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1356577930, now seen corresponding path program 5 times [2021-12-06 17:45:15,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:15,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240977158] [2021-12-06 17:45:15,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:15,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:15,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:45:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:15,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:15,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:15,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:15,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 17:45:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:15,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:16,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:16,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:16,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 17:45:16,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:16,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240977158] [2021-12-06 17:45:16,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240977158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:16,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589951060] [2021-12-06 17:45:16,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:45:16,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:16,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:16,177 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:16,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:45:16,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 17:45:16,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:16,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-06 17:45:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 17:45:16,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:34,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589951060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:34,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:45:34,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 40 [2021-12-06 17:45:34,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15895956] [2021-12-06 17:45:34,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:34,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 17:45:34,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:34,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 17:45:34,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3427, Unknown=7, NotChecked=0, Total=3660 [2021-12-06 17:45:34,276 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 14 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-06 17:45:35,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:35,019 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-12-06 17:45:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 17:45:35,019 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 14 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) Word has length 69 [2021-12-06 17:45:35,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:35,021 INFO L225 Difference]: With dead ends: 68 [2021-12-06 17:45:35,021 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 17:45:35,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=439, Invalid=4956, Unknown=7, NotChecked=0, Total=5402 [2021-12-06 17:45:35,023 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:35,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 394 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:45:35,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 17:45:35,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-12-06 17:45:35,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (27), 13 states have call predecessors, (27), 8 states have call successors, (27) [2021-12-06 17:45:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 75 transitions. [2021-12-06 17:45:35,030 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 75 transitions. Word has length 69 [2021-12-06 17:45:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:35,031 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 75 transitions. [2021-12-06 17:45:35,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 14 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-06 17:45:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 75 transitions. [2021-12-06 17:45:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 17:45:35,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:35,032 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:35,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:45:35,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:35,234 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:45:35,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:35,235 INFO L85 PathProgramCache]: Analyzing trace with hash -900801010, now seen corresponding path program 6 times [2021-12-06 17:45:35,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:35,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923884105] [2021-12-06 17:45:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:35,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:35,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:45:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:35,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:35,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:35,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:35,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 17:45:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:35,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:35,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:35,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:35,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:35,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-06 17:45:35,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:35,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923884105] [2021-12-06 17:45:35,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923884105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:35,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805848647] [2021-12-06 17:45:35,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:45:35,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:35,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:35,793 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:35,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:45:35,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-06 17:45:35,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:35,841 WARN L261 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 121 conjunts are in the unsatisfiable core [2021-12-06 17:45:35,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 5 proven. 134 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-06 17:45:36,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:52,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805848647] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:52,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:45:52,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20] total 44 [2021-12-06 17:45:52,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001536861] [2021-12-06 17:45:52,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:52,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 17:45:52,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:52,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 17:45:52,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4167, Unknown=7, NotChecked=0, Total=4422 [2021-12-06 17:45:52,640 INFO L87 Difference]: Start difference. First operand 55 states and 75 transitions. Second operand has 44 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 27 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 16 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) [2021-12-06 17:45:53,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:53,472 INFO L93 Difference]: Finished difference Result 72 states and 97 transitions. [2021-12-06 17:45:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 17:45:53,472 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 27 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 16 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) Word has length 76 [2021-12-06 17:45:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:53,474 INFO L225 Difference]: With dead ends: 72 [2021-12-06 17:45:53,474 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 17:45:53,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=497, Invalid=5816, Unknown=7, NotChecked=0, Total=6320 [2021-12-06 17:45:53,478 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:53,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 447 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:45:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 17:45:53,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-12-06 17:45:53,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 8 states have call successors, (8), 3 states have call predecessors, (8), 10 states have return successors, (32), 14 states have call predecessors, (32), 8 states have call successors, (32) [2021-12-06 17:45:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2021-12-06 17:45:53,489 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 76 [2021-12-06 17:45:53,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:53,489 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2021-12-06 17:45:53,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 27 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 16 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) [2021-12-06 17:45:53,490 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2021-12-06 17:45:53,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 17:45:53,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:53,491 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:53,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 17:45:53,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:53,693 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:45:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:53,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1272279482, now seen corresponding path program 7 times [2021-12-06 17:45:53,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:53,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901909939] [2021-12-06 17:45:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:53,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:53,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:45:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:53,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:53,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:53,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:53,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 17:45:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:53,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:54,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:54,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:54,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:54,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:54,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:45:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-06 17:45:54,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:54,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901909939] [2021-12-06 17:45:54,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901909939] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:54,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833992747] [2021-12-06 17:45:54,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:45:54,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:54,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:54,327 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:54,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:45:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:54,375 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-06 17:45:54,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 6 proven. 165 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-06 17:45:55,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:46:19,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833992747] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:19,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:46:19,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22] total 48 [2021-12-06 17:46:19,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117716592] [2021-12-06 17:46:19,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:46:19,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 17:46:19,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:46:19,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 17:46:19,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=4976, Unknown=10, NotChecked=0, Total=5256 [2021-12-06 17:46:19,379 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand has 48 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 29 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 18 states have return successors, (19), 19 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-06 17:46:20,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:20,285 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2021-12-06 17:46:20,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:46:20,285 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 29 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 18 states have return successors, (19), 19 states have call predecessors, (19), 5 states have call successors, (19) Word has length 83 [2021-12-06 17:46:20,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:20,287 INFO L225 Difference]: With dead ends: 78 [2021-12-06 17:46:20,287 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 17:46:20,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=573, Invalid=7073, Unknown=10, NotChecked=0, Total=7656 [2021-12-06 17:46:20,289 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:20,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 477 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:46:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 17:46:20,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2021-12-06 17:46:20,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 11 states have return successors, (37), 15 states have call predecessors, (37), 8 states have call successors, (37) [2021-12-06 17:46:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 89 transitions. [2021-12-06 17:46:20,297 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 89 transitions. Word has length 83 [2021-12-06 17:46:20,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:20,298 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 89 transitions. [2021-12-06 17:46:20,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 29 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 18 states have return successors, (19), 19 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-06 17:46:20,298 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 89 transitions. [2021-12-06 17:46:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 17:46:20,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:20,299 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:46:20,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 17:46:20,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 17:46:20,501 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:46:20,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:20,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1915241724, now seen corresponding path program 8 times [2021-12-06 17:46:20,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:20,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469772840] [2021-12-06 17:46:20,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:20,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:20,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:46:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:20,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:20,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:20,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:20,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:20,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:46:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:20,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:20,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:20,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:21,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:21,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:21,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-06 17:46:21,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:46:21,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469772840] [2021-12-06 17:46:21,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469772840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:21,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274547313] [2021-12-06 17:46:21,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:46:21,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:21,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:46:21,219 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:46:21,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 17:46:21,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:46:21,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:46:21,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 145 conjunts are in the unsatisfiable core [2021-12-06 17:46:21,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 6 proven. 197 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-06 17:46:22,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:46:39,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274547313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:39,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:46:39,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22] total 50 [2021-12-06 17:46:39,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12214678] [2021-12-06 17:46:39,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:46:39,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 17:46:39,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:46:39,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 17:46:39,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=5266, Unknown=6, NotChecked=0, Total=5550 [2021-12-06 17:46:39,724 INFO L87 Difference]: Start difference. First operand 61 states and 89 transitions. Second operand has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) [2021-12-06 17:46:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:40,961 INFO L93 Difference]: Finished difference Result 82 states and 117 transitions. [2021-12-06 17:46:40,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:46:40,961 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) Word has length 90 [2021-12-06 17:46:40,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:40,962 INFO L225 Difference]: With dead ends: 82 [2021-12-06 17:46:40,962 INFO L226 Difference]: Without dead ends: 76 [2021-12-06 17:46:40,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=597, Invalid=7769, Unknown=6, NotChecked=0, Total=8372 [2021-12-06 17:46:40,965 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:40,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 613 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:46:40,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-06 17:46:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2021-12-06 17:46:40,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 11 states have return successors, (37), 15 states have call predecessors, (37), 8 states have call successors, (37) [2021-12-06 17:46:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 89 transitions. [2021-12-06 17:46:40,972 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 89 transitions. Word has length 90 [2021-12-06 17:46:40,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:40,973 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 89 transitions. [2021-12-06 17:46:40,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) [2021-12-06 17:46:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 89 transitions. [2021-12-06 17:46:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 17:46:40,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:40,974 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:46:40,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 17:46:41,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 17:46:41,176 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:46:41,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:41,177 INFO L85 PathProgramCache]: Analyzing trace with hash -388290116, now seen corresponding path program 9 times [2021-12-06 17:46:41,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:41,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438524244] [2021-12-06 17:46:41,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:41,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:41,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:46:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:41,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:41,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:41,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:46:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:41,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:41,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:41,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:41,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-06 17:46:41,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:46:41,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438524244] [2021-12-06 17:46:41,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438524244] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:41,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940760728] [2021-12-06 17:46:41,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:46:41,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:41,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:46:41,579 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:46:41,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 17:46:41,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 17:46:41,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:46:41,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-06 17:46:41,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 9 proven. 79 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 17:46:42,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:46:46,003 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_95_78| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| Int) (v_mult_~n_BEFORE_CALL_95 Int)) (let ((.cse4 (* 4 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141|))) (let ((.cse0 (div (+ (* v_mult_~n_BEFORE_CALL_95 2) (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| 2) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| (- 8))) (- 4))) (.cse1 (div (+ (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| 8) (* v_mult_~n_BEFORE_CALL_95 (- 2)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| (- 2))) 4)) (.cse3 (+ |c_mult_#res| .cse4)) (.cse2 (* 4 |aux_div_v_mult_#in~n_BEFORE_CALL_95_78|))) (or (< (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121| 1) .cse0) (< .cse0 (+ 2 .cse1)) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| 0) (<= (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| .cse2 4) .cse3) (<= .cse0 (+ |aux_div_v_mult_#in~n_BEFORE_CALL_95_78| 1)) (< .cse4 (+ (* 4 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121|) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141|)) (< (+ .cse1 1) |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141|) (< .cse3 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| .cse2)))))) (= |c_mult_#in~m| 0) (forall ((|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_95_112| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| Int) (v_mult_~n_BEFORE_CALL_95 Int)) (let ((.cse7 (div (+ (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| 2) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| 8) (* v_mult_~n_BEFORE_CALL_95 (- 2))) 4))) (let ((.cse5 (+ .cse7 1)) (.cse6 (div (+ (* v_mult_~n_BEFORE_CALL_95 2) (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| (- 8)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| (- 2))) (- 4))) (.cse8 (* 4 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135|)) (.cse9 (* 4 |aux_div_v_mult_#in~n_BEFORE_CALL_95_112|))) (or (< .cse5 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121|) (< .cse6 (+ 2 .cse7)) (<= |aux_div_v_mult_#in~n_BEFORE_CALL_95_112| .cse5) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| 0) (< (+ |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| 1) .cse6) (< (* 4 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121|) (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| .cse8)) (< .cse9 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| |c_mult_#res| .cse8)) (<= (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| |c_mult_#res| 4 .cse8) .cse9)))))) is different from false [2021-12-06 17:46:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 24 proven. 103 refuted. 0 times theorem prover too weak. 29 trivial. 14 not checked. [2021-12-06 17:46:46,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940760728] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:46:46,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:46:46,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 28] total 57 [2021-12-06 17:46:46,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254434] [2021-12-06 17:46:46,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:46:46,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 17:46:46,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:46:46,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 17:46:46,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2877, Unknown=1, NotChecked=108, Total=3192 [2021-12-06 17:46:46,410 INFO L87 Difference]: Start difference. First operand 61 states and 89 transitions. Second operand has 57 states, 53 states have (on average 1.490566037735849) internal successors, (79), 36 states have internal predecessors, (79), 12 states have call successors, (12), 1 states have call predecessors, (12), 16 states have return successors, (22), 21 states have call predecessors, (22), 12 states have call successors, (22) [2021-12-06 17:46:47,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:47,467 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2021-12-06 17:46:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 17:46:47,467 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 53 states have (on average 1.490566037735849) internal successors, (79), 36 states have internal predecessors, (79), 12 states have call successors, (12), 1 states have call predecessors, (12), 16 states have return successors, (22), 21 states have call predecessors, (22), 12 states have call successors, (22) Word has length 62 [2021-12-06 17:46:47,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:47,468 INFO L225 Difference]: With dead ends: 82 [2021-12-06 17:46:47,468 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 17:46:47,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=542, Invalid=5313, Unknown=1, NotChecked=150, Total=6006 [2021-12-06 17:46:47,469 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:47,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 419 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1268 Invalid, 0 Unknown, 44 Unchecked, 0.5s Time] [2021-12-06 17:46:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 17:46:47,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2021-12-06 17:46:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 8 states have call successors, (8), 3 states have call predecessors, (8), 12 states have return successors, (35), 16 states have call predecessors, (35), 8 states have call successors, (35) [2021-12-06 17:46:47,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2021-12-06 17:46:47,475 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 62 [2021-12-06 17:46:47,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:47,476 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2021-12-06 17:46:47,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 53 states have (on average 1.490566037735849) internal successors, (79), 36 states have internal predecessors, (79), 12 states have call successors, (12), 1 states have call predecessors, (12), 16 states have return successors, (22), 21 states have call predecessors, (22), 12 states have call successors, (22) [2021-12-06 17:46:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2021-12-06 17:46:47,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 17:46:47,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:47,477 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:46:47,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 17:46:47,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 17:46:47,678 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:46:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:47,680 INFO L85 PathProgramCache]: Analyzing trace with hash 230391048, now seen corresponding path program 10 times [2021-12-06 17:46:47,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:47,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25683702] [2021-12-06 17:46:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:47,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:47,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:46:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:47,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:47,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:47,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:46:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:47,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:47,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:48,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:48,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:48,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 17:46:48,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:46:48,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25683702] [2021-12-06 17:46:48,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25683702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:48,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461536892] [2021-12-06 17:46:48,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:46:48,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:48,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:46:48,145 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:46:48,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 17:46:48,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:46:48,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:46:48,195 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-06 17:46:48,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-06 17:46:48,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:46:53,713 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |c_mult_#in~m|) (<= |c_mult_#in~m| 0) (forall ((|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131| Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| Int) (v_mult_~n_BEFORE_CALL_109 Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_109_92| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| Int)) (let ((.cse3 (div (+ (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| 2) (* v_mult_~n_BEFORE_CALL_109 (- 2)) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| 10)) 5))) (let ((.cse0 (+ .cse3 1)) (.cse2 (div (+ (- 1) (* v_mult_~n_BEFORE_CALL_109 2) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| (- 2)) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| (- 10))) (- 5))) (.cse1 (* 5 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157|)) (.cse4 (* 5 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131|))) (or (< .cse0 |aux_div_v_mult_#in~n_BEFORE_CALL_109_92|) (< (* 5 |aux_div_v_mult_#in~n_BEFORE_CALL_109_92|) (+ .cse1 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157|)) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| 0) (< (+ |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| 1) .cse2) (<= |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131| .cse0) (< .cse2 (+ 2 .cse3)) (< .cse4 (+ .cse1 |c_mult_#res| |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157|)) (<= (+ .cse1 |c_mult_#res| 5 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157|) .cse4))))) (forall ((|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123| Int) (v_mult_~n_BEFORE_CALL_109 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_109_92| Int)) (let ((.cse9 (* 5 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147|))) (let ((.cse8 (div (+ (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| (- 10)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| (- 2)) (* v_mult_~n_BEFORE_CALL_109 2)) (- 5))) (.cse7 (div (+ (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| 2) (* v_mult_~n_BEFORE_CALL_109 (- 2)) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| 10)) 5)) (.cse6 (+ |c_mult_#res| |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| .cse9)) (.cse5 (* 5 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123|))) (or (<= (+ 5 .cse5) .cse6) (< (+ .cse7 1) |aux_div_v_mult_#in~n_BEFORE_CALL_109_92|) (< (+ |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| 1) .cse8) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| 0) (< (* 5 |aux_div_v_mult_#in~n_BEFORE_CALL_109_92|) (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| .cse9)) (<= .cse8 (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123| 1)) (< .cse8 (+ .cse7 2)) (< .cse6 .cse5)))))) is different from false [2021-12-06 17:46:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 142 refuted. 0 times theorem prover too weak. 38 trivial. 16 not checked. [2021-12-06 17:46:54,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461536892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:46:54,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:46:54,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 31] total 63 [2021-12-06 17:46:54,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693424666] [2021-12-06 17:46:54,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:46:54,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 17:46:54,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:46:54,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 17:46:54,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3557, Unknown=1, NotChecked=120, Total=3906 [2021-12-06 17:46:54,123 INFO L87 Difference]: Start difference. First operand 64 states and 89 transitions. Second operand has 63 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 39 states have internal predecessors, (85), 13 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2021-12-06 17:46:57,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:46:57,495 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2021-12-06 17:46:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 17:46:57,496 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 39 states have internal predecessors, (85), 13 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) Word has length 69 [2021-12-06 17:46:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:46:57,497 INFO L225 Difference]: With dead ends: 84 [2021-12-06 17:46:57,497 INFO L226 Difference]: Without dead ends: 77 [2021-12-06 17:46:57,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=622, Invalid=6521, Unknown=1, NotChecked=166, Total=7310 [2021-12-06 17:46:57,498 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:46:57,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 429 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1294 Invalid, 0 Unknown, 44 Unchecked, 0.6s Time] [2021-12-06 17:46:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-06 17:46:57,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2021-12-06 17:46:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 8 states have call successors, (8), 3 states have call predecessors, (8), 13 states have return successors, (33), 17 states have call predecessors, (33), 8 states have call successors, (33) [2021-12-06 17:46:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2021-12-06 17:46:57,509 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 69 [2021-12-06 17:46:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:46:57,509 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2021-12-06 17:46:57,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 39 states have internal predecessors, (85), 13 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2021-12-06 17:46:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2021-12-06 17:46:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 17:46:57,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:46:57,511 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:46:57,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 17:46:57,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:57,713 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:46:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:46:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1792410124, now seen corresponding path program 11 times [2021-12-06 17:46:57,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:46:57,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220496801] [2021-12-06 17:46:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:46:57,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:46:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:57,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:46:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:57,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:57,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:57,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:46:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:57,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:57,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:58,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:58,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:58,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:58,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:46:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:46:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-06 17:46:58,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:46:58,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220496801] [2021-12-06 17:46:58,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220496801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:46:58,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282288854] [2021-12-06 17:46:58,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:46:58,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:46:58,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:46:58,222 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:46:58,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 17:46:58,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-06 17:46:58,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:46:58,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 121 conjunts are in the unsatisfiable core [2021-12-06 17:46:58,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:46:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 17:46:58,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:47:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 203 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 17:47:01,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282288854] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:47:01,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:47:01,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 33] total 68 [2021-12-06 17:47:01,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905497684] [2021-12-06 17:47:01,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:47:01,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 17:47:01,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:47:01,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 17:47:01,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4308, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 17:47:01,565 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand has 68 states, 64 states have (on average 1.421875) internal successors, (91), 41 states have internal predecessors, (91), 14 states have call successors, (14), 1 states have call predecessors, (14), 19 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-06 17:47:03,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:47:03,100 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2021-12-06 17:47:03,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 17:47:03,100 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 64 states have (on average 1.421875) internal successors, (91), 41 states have internal predecessors, (91), 14 states have call successors, (14), 1 states have call predecessors, (14), 19 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) Word has length 76 [2021-12-06 17:47:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:47:03,101 INFO L225 Difference]: With dead ends: 86 [2021-12-06 17:47:03,101 INFO L226 Difference]: Without dead ends: 79 [2021-12-06 17:47:03,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=704, Invalid=7852, Unknown=0, NotChecked=0, Total=8556 [2021-12-06 17:47:03,102 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 53 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:47:03,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 622 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:47:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-06 17:47:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2021-12-06 17:47:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 48 states have internal predecessors, (50), 8 states have call successors, (8), 3 states have call predecessors, (8), 14 states have return successors, (31), 18 states have call predecessors, (31), 8 states have call successors, (31) [2021-12-06 17:47:03,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2021-12-06 17:47:03,107 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 76 [2021-12-06 17:47:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:47:03,107 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2021-12-06 17:47:03,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 64 states have (on average 1.421875) internal successors, (91), 41 states have internal predecessors, (91), 14 states have call successors, (14), 1 states have call predecessors, (14), 19 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-06 17:47:03,108 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2021-12-06 17:47:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 17:47:03,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:47:03,109 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:47:03,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 17:47:03,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 17:47:03,311 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:47:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:47:03,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1119099064, now seen corresponding path program 12 times [2021-12-06 17:47:03,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:47:03,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980303917] [2021-12-06 17:47:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:47:03,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:47:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:03,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:47:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:03,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:03,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:03,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:47:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:03,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:03,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:03,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:03,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:03,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:03,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:03,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-06 17:47:03,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:47:03,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980303917] [2021-12-06 17:47:03,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980303917] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:47:03,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541732067] [2021-12-06 17:47:03,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:47:03,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:47:03,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:47:03,890 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:47:03,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 17:47:03,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-06 17:47:03,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:47:03,952 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-06 17:47:03,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:47:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-06 17:47:04,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:47:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-06 17:47:07,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541732067] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:47:07,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:47:07,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24, 36] total 74 [2021-12-06 17:47:07,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70148133] [2021-12-06 17:47:07,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:47:07,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-06 17:47:07,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:47:07,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-06 17:47:07,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=5132, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 17:47:07,856 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 44 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) [2021-12-06 17:47:09,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:47:09,559 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2021-12-06 17:47:09,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 17:47:09,560 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 44 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) Word has length 83 [2021-12-06 17:47:09,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:47:09,560 INFO L225 Difference]: With dead ends: 92 [2021-12-06 17:47:09,561 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 17:47:09,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 140 SyntacticMatches, 4 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2171 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=792, Invalid=9308, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 17:47:09,562 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 83 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 2335 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 2471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:47:09,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 783 Invalid, 2471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2335 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:47:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 17:47:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2021-12-06 17:47:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 8 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (34), 20 states have call predecessors, (34), 8 states have call successors, (34) [2021-12-06 17:47:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2021-12-06 17:47:09,568 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 83 [2021-12-06 17:47:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:47:09,568 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2021-12-06 17:47:09,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 44 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) [2021-12-06 17:47:09,568 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2021-12-06 17:47:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 17:47:09,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:47:09,569 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:47:09,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 17:47:09,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 17:47:09,771 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:47:09,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:47:09,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1145702838, now seen corresponding path program 13 times [2021-12-06 17:47:09,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:47:09,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831783510] [2021-12-06 17:47:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:47:09,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:47:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:09,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:47:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:09,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:09,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:09,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:10,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:10,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:10,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 17:47:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:10,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:10,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 119 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 17:47:10,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:47:10,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831783510] [2021-12-06 17:47:10,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831783510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:47:10,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844352143] [2021-12-06 17:47:10,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:47:10,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:47:10,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:47:10,226 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:47:10,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 17:47:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:10,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-06 17:47:10,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:47:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 2 proven. 111 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-06 17:47:10,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:47:31,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844352143] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:47:31,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:47:31,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 42 [2021-12-06 17:47:31,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182108080] [2021-12-06 17:47:31,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:47:31,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 17:47:31,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:47:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 17:47:31,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=3203, Unknown=8, NotChecked=0, Total=3422 [2021-12-06 17:47:31,300 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 42 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 26 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-06 17:47:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:47:32,128 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2021-12-06 17:47:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:47:32,128 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 26 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) Word has length 69 [2021-12-06 17:47:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:47:32,129 INFO L225 Difference]: With dead ends: 88 [2021-12-06 17:47:32,129 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 17:47:32,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=436, Invalid=4958, Unknown=8, NotChecked=0, Total=5402 [2021-12-06 17:47:32,130 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:47:32,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 418 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:47:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 17:47:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2021-12-06 17:47:32,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 8 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (34), 20 states have call predecessors, (34), 8 states have call successors, (34) [2021-12-06 17:47:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2021-12-06 17:47:32,135 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 69 [2021-12-06 17:47:32,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:47:32,136 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2021-12-06 17:47:32,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 26 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-06 17:47:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2021-12-06 17:47:32,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 17:47:32,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:47:32,138 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:47:32,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 17:47:32,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 17:47:32,340 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:47:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:47:32,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1358540522, now seen corresponding path program 14 times [2021-12-06 17:47:32,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:47:32,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817851719] [2021-12-06 17:47:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:47:32,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:47:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:47:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 17:47:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:33,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-06 17:47:33,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:47:33,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817851719] [2021-12-06 17:47:33,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817851719] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:47:33,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042312490] [2021-12-06 17:47:33,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:47:33,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:47:33,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:47:33,078 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:47:33,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 17:47:33,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:47:33,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:47:33,158 WARN L261 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 157 conjunts are in the unsatisfiable core [2021-12-06 17:47:33,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:47:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 236 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-12-06 17:47:34,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:47:53,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042312490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:47:53,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:47:53,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 26] total 56 [2021-12-06 17:47:53,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263491412] [2021-12-06 17:47:53,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:47:53,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 17:47:53,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:47:53,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 17:47:53,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=6821, Unknown=5, NotChecked=0, Total=7140 [2021-12-06 17:47:53,996 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 56 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 33 states have internal predecessors, (63), 5 states have call successors, (5), 1 states have call predecessors, (5), 22 states have return successors, (23), 23 states have call predecessors, (23), 5 states have call successors, (23) [2021-12-06 17:47:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:47:55,198 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2021-12-06 17:47:55,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 17:47:55,198 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 33 states have internal predecessors, (63), 5 states have call successors, (5), 1 states have call predecessors, (5), 22 states have return successors, (23), 23 states have call predecessors, (23), 5 states have call successors, (23) Word has length 97 [2021-12-06 17:47:55,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:47:55,199 INFO L225 Difference]: With dead ends: 92 [2021-12-06 17:47:55,199 INFO L226 Difference]: Without dead ends: 88 [2021-12-06 17:47:55,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 148 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2263 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=737, Invalid=9970, Unknown=5, NotChecked=0, Total=10712 [2021-12-06 17:47:55,201 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:47:55,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 567 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:47:55,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-06 17:47:55,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2021-12-06 17:47:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 9 states have call successors, (9), 3 states have call predecessors, (9), 17 states have return successors, (41), 22 states have call predecessors, (41), 9 states have call successors, (41) [2021-12-06 17:47:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2021-12-06 17:47:55,207 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 97 [2021-12-06 17:47:55,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:47:55,207 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2021-12-06 17:47:55,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 33 states have internal predecessors, (63), 5 states have call successors, (5), 1 states have call predecessors, (5), 22 states have return successors, (23), 23 states have call predecessors, (23), 5 states have call successors, (23) [2021-12-06 17:47:55,208 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2021-12-06 17:47:55,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 17:47:55,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:47:55,209 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:47:55,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 17:47:55,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 17:47:55,411 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:47:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:47:55,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1916071604, now seen corresponding path program 15 times [2021-12-06 17:47:55,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:47:55,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323029948] [2021-12-06 17:47:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:47:55,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:47:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:55,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:47:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:55,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:55,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:55,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:55,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:55,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:47:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:55,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:55,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:55,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:55,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:55,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:55,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:56,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:56,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-12-06 17:47:56,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:47:56,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323029948] [2021-12-06 17:47:56,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323029948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:47:56,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062324790] [2021-12-06 17:47:56,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:47:56,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:47:56,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:47:56,154 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:47:56,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 17:47:56,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-12-06 17:47:56,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:47:56,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 169 conjunts are in the unsatisfiable core [2021-12-06 17:47:56,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:47:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 8 proven. 274 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-12-06 17:47:57,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:30,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062324790] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:30,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:48:30,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 26] total 58 [2021-12-06 17:48:30,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674711756] [2021-12-06 17:48:30,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:30,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 17:48:30,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:30,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 17:48:30,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=7318, Unknown=12, NotChecked=0, Total=7656 [2021-12-06 17:48:30,821 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 58 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 34 states have internal predecessors, (65), 5 states have call successors, (5), 1 states have call predecessors, (5), 23 states have return successors, (24), 24 states have call predecessors, (24), 5 states have call successors, (24) [2021-12-06 17:48:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:32,116 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2021-12-06 17:48:32,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 17:48:32,116 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 34 states have internal predecessors, (65), 5 states have call successors, (5), 1 states have call predecessors, (5), 23 states have return successors, (24), 24 states have call predecessors, (24), 5 states have call successors, (24) Word has length 104 [2021-12-06 17:48:32,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:32,117 INFO L225 Difference]: With dead ends: 94 [2021-12-06 17:48:32,117 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 17:48:32,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=752, Invalid=10578, Unknown=12, NotChecked=0, Total=11342 [2021-12-06 17:48:32,118 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:32,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 642 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:48:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 17:48:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2021-12-06 17:48:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 9 states have call successors, (9), 3 states have call predecessors, (9), 17 states have return successors, (41), 22 states have call predecessors, (41), 9 states have call successors, (41) [2021-12-06 17:48:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2021-12-06 17:48:32,124 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 104 [2021-12-06 17:48:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:32,125 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2021-12-06 17:48:32,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 34 states have internal predecessors, (65), 5 states have call successors, (5), 1 states have call predecessors, (5), 23 states have return successors, (24), 24 states have call predecessors, (24), 5 states have call successors, (24) [2021-12-06 17:48:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2021-12-06 17:48:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 17:48:32,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:32,126 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:32,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 17:48:32,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 17:48:32,328 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:32,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:32,329 INFO L85 PathProgramCache]: Analyzing trace with hash -43543002, now seen corresponding path program 16 times [2021-12-06 17:48:32,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:32,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723747375] [2021-12-06 17:48:32,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:32,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:32,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:48:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:32,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:32,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:32,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:32,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:32,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:32,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 17:48:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:32,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:32,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:32,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:32,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:32,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:33,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:33,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:33,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-06 17:48:33,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:33,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723747375] [2021-12-06 17:48:33,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723747375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:33,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613532915] [2021-12-06 17:48:33,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:48:33,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:33,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:33,190 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:33,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 17:48:33,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:48:33,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:48:33,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 181 conjunts are in the unsatisfiable core [2021-12-06 17:48:33,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 8 proven. 315 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2021-12-06 17:48:34,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:06,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613532915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:06,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:49:06,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26] total 60 [2021-12-06 17:49:06,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303390336] [2021-12-06 17:49:06,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:06,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 17:49:06,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:06,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 17:49:06,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=7664, Unknown=12, NotChecked=0, Total=8010 [2021-12-06 17:49:06,589 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 60 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 35 states have internal predecessors, (67), 5 states have call successors, (5), 1 states have call predecessors, (5), 24 states have return successors, (25), 25 states have call predecessors, (25), 5 states have call successors, (25) [2021-12-06 17:49:07,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:07,890 INFO L93 Difference]: Finished difference Result 92 states and 117 transitions. [2021-12-06 17:49:07,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 17:49:07,891 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 35 states have internal predecessors, (67), 5 states have call successors, (5), 1 states have call predecessors, (5), 24 states have return successors, (25), 25 states have call predecessors, (25), 5 states have call successors, (25) Word has length 111 [2021-12-06 17:49:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:07,892 INFO L225 Difference]: With dead ends: 92 [2021-12-06 17:49:07,892 INFO L226 Difference]: Without dead ends: 88 [2021-12-06 17:49:07,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=762, Invalid=10998, Unknown=12, NotChecked=0, Total=11772 [2021-12-06 17:49:07,893 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:07,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 783 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:49:07,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-06 17:49:07,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2021-12-06 17:49:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 17 states have return successors, (39), 21 states have call predecessors, (39), 8 states have call successors, (39) [2021-12-06 17:49:07,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2021-12-06 17:49:07,898 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 111 [2021-12-06 17:49:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:07,899 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2021-12-06 17:49:07,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 35 states have internal predecessors, (67), 5 states have call successors, (5), 1 states have call predecessors, (5), 24 states have return successors, (25), 25 states have call predecessors, (25), 5 states have call successors, (25) [2021-12-06 17:49:07,899 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2021-12-06 17:49:07,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 17:49:07,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:07,900 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:07,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 17:49:08,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:08,102 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:08,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:08,103 INFO L85 PathProgramCache]: Analyzing trace with hash -287264164, now seen corresponding path program 17 times [2021-12-06 17:49:08,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:08,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580434519] [2021-12-06 17:49:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:08,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:49:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:49:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-06 17:49:08,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:08,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580434519] [2021-12-06 17:49:08,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580434519] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:08,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877109663] [2021-12-06 17:49:08,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:49:08,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:08,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:08,744 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:08,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 17:49:08,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-06 17:49:08,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:08,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 145 conjunts are in the unsatisfiable core [2021-12-06 17:49:08,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 17 proven. 193 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-06 17:49:09,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 315 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-06 17:49:13,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877109663] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:13,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:13,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 39] total 80 [2021-12-06 17:49:13,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114878851] [2021-12-06 17:49:13,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:13,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 17:49:13,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:13,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 17:49:13,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=6028, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 17:49:13,215 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2021-12-06 17:49:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:14,787 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2021-12-06 17:49:14,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 17:49:14,788 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) Word has length 90 [2021-12-06 17:49:14,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:14,789 INFO L225 Difference]: With dead ends: 98 [2021-12-06 17:49:14,789 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 17:49:14,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 142 SyntacticMatches, 14 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2841 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=884, Invalid=10888, Unknown=0, NotChecked=0, Total=11772 [2021-12-06 17:49:14,790 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:14,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 676 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:49:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 17:49:14,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-12-06 17:49:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 18 states have return successors, (37), 22 states have call predecessors, (37), 8 states have call successors, (37) [2021-12-06 17:49:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2021-12-06 17:49:14,795 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 90 [2021-12-06 17:49:14,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:14,795 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2021-12-06 17:49:14,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2021-12-06 17:49:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2021-12-06 17:49:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 17:49:14,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:14,796 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:14,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 17:49:14,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:14,998 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:14,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1870853176, now seen corresponding path program 18 times [2021-12-06 17:49:14,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:15,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011717001] [2021-12-06 17:49:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:15,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:15,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:49:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:15,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:15,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:15,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:15,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:15,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:15,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:15,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 17:49:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:15,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 12 proven. 121 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-06 17:49:15,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:15,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011717001] [2021-12-06 17:49:15,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011717001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:15,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152572992] [2021-12-06 17:49:15,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:49:15,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:15,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:15,505 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:15,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 17:49:15,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 17:49:15,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:15,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-06 17:49:15,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 17:49:16,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 17:49:17,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152572992] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:17,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:17,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 31] total 70 [2021-12-06 17:49:17,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449299996] [2021-12-06 17:49:17,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:17,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 17:49:17,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:17,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 17:49:17,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=4543, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 17:49:17,876 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand has 70 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 43 states have internal predecessors, (98), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (27), 27 states have call predecessors, (27), 14 states have call successors, (27) [2021-12-06 17:49:19,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:19,418 INFO L93 Difference]: Finished difference Result 113 states and 145 transitions. [2021-12-06 17:49:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 17:49:19,419 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 43 states have internal predecessors, (98), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (27), 27 states have call predecessors, (27), 14 states have call successors, (27) Word has length 69 [2021-12-06 17:49:19,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:19,420 INFO L225 Difference]: With dead ends: 113 [2021-12-06 17:49:19,420 INFO L226 Difference]: Without dead ends: 97 [2021-12-06 17:49:19,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=914, Invalid=9388, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 17:49:19,426 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 37 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:19,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 546 Invalid, 1974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 17:49:19,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-06 17:49:19,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2021-12-06 17:49:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 18 states have return successors, (36), 22 states have call predecessors, (36), 8 states have call successors, (36) [2021-12-06 17:49:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2021-12-06 17:49:19,433 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 69 [2021-12-06 17:49:19,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:19,433 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2021-12-06 17:49:19,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 43 states have internal predecessors, (98), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (27), 27 states have call predecessors, (27), 14 states have call successors, (27) [2021-12-06 17:49:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2021-12-06 17:49:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 17:49:19,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:19,435 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:19,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 17:49:19,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:19,636 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:19,637 INFO L85 PathProgramCache]: Analyzing trace with hash -401646488, now seen corresponding path program 19 times [2021-12-06 17:49:19,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:19,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583003951] [2021-12-06 17:49:19,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:19,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:19,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:49:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:19,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:19,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:19,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:49:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:19,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:19,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:19,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:20,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:20,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:20,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:20,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:20,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:20,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-06 17:49:20,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:20,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583003951] [2021-12-06 17:49:20,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583003951] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:20,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711507760] [2021-12-06 17:49:20,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:49:20,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:20,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:20,362 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:20,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 17:49:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:20,446 WARN L261 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 157 conjunts are in the unsatisfiable core [2021-12-06 17:49:20,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 9 proven. 238 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-06 17:49:21,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 380 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 17:49:25,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711507760] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:25,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:25,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28, 42] total 86 [2021-12-06 17:49:25,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124509411] [2021-12-06 17:49:25,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:25,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-06 17:49:25,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:25,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-06 17:49:25,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=6996, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 17:49:25,561 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 86 states, 82 states have (on average 1.4024390243902438) internal successors, (115), 50 states have internal predecessors, (115), 17 states have call successors, (17), 1 states have call predecessors, (17), 25 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) [2021-12-06 17:49:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:27,760 INFO L93 Difference]: Finished difference Result 110 states and 139 transitions. [2021-12-06 17:49:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 17:49:27,760 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 82 states have (on average 1.4024390243902438) internal successors, (115), 50 states have internal predecessors, (115), 17 states have call successors, (17), 1 states have call predecessors, (17), 25 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) Word has length 97 [2021-12-06 17:49:27,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:27,761 INFO L225 Difference]: With dead ends: 110 [2021-12-06 17:49:27,761 INFO L226 Difference]: Without dead ends: 103 [2021-12-06 17:49:27,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 164 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2921 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=980, Invalid=12592, Unknown=0, NotChecked=0, Total=13572 [2021-12-06 17:49:27,766 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 149 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 2761 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 2761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:27,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 924 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 2761 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 17:49:27,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-06 17:49:27,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 88. [2021-12-06 17:49:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 8 states have call successors, (8), 3 states have call predecessors, (8), 20 states have return successors, (39), 24 states have call predecessors, (39), 8 states have call successors, (39) [2021-12-06 17:49:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2021-12-06 17:49:27,772 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 97 [2021-12-06 17:49:27,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:27,772 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2021-12-06 17:49:27,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 82 states have (on average 1.4024390243902438) internal successors, (115), 50 states have internal predecessors, (115), 17 states have call successors, (17), 1 states have call predecessors, (17), 25 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) [2021-12-06 17:49:27,773 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2021-12-06 17:49:27,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 17:49:27,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:27,773 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:27,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 17:49:27,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:27,975 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:27,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1659753786, now seen corresponding path program 20 times [2021-12-06 17:49:27,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:27,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798299979] [2021-12-06 17:49:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:27,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:28,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:49:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:28,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:28,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:28,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:28,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:28,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:28,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:28,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:28,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 17:49:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:28,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:28,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-06 17:49:28,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:28,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798299979] [2021-12-06 17:49:28,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798299979] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:28,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462615104] [2021-12-06 17:49:28,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:49:28,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:28,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:28,572 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:28,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 17:49:28,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:49:28,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:28,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-06 17:49:28,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 2 proven. 172 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-06 17:49:29,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:49,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462615104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:49,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:49:49,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24] total 50 [2021-12-06 17:49:49,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412859010] [2021-12-06 17:49:49,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:49,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 17:49:49,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:49,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 17:49:49,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=4176, Unknown=7, NotChecked=0, Total=4422 [2021-12-06 17:49:49,045 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) [2021-12-06 17:49:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:50,095 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2021-12-06 17:49:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:49:50,096 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) Word has length 83 [2021-12-06 17:49:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:50,096 INFO L225 Difference]: With dead ends: 98 [2021-12-06 17:49:50,097 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 17:49:50,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=518, Invalid=6447, Unknown=7, NotChecked=0, Total=6972 [2021-12-06 17:49:50,097 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:50,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 604 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:49:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 17:49:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2021-12-06 17:49:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 8 states have call successors, (8), 3 states have call predecessors, (8), 20 states have return successors, (39), 24 states have call predecessors, (39), 8 states have call successors, (39) [2021-12-06 17:49:50,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2021-12-06 17:49:50,103 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 83 [2021-12-06 17:49:50,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:50,103 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2021-12-06 17:49:50,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) [2021-12-06 17:49:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2021-12-06 17:49:50,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 17:49:50,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:50,104 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:50,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 17:49:50,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 17:49:50,306 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:50,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1817590444, now seen corresponding path program 21 times [2021-12-06 17:49:50,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:50,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460228945] [2021-12-06 17:49:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:50,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:50,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:49:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:50,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:50,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:50,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:49:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:50,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:50,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:50,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:50,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:50,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:50,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:50,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:50,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:51,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:51,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-12-06 17:49:51,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:51,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460228945] [2021-12-06 17:49:51,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460228945] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:49:51,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340163287] [2021-12-06 17:49:51,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:49:51,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:49:51,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:49:51,128 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:49:51,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 17:49:51,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-06 17:49:51,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:49:51,244 WARN L261 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 169 conjunts are in the unsatisfiable core [2021-12-06 17:49:51,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:49:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 10 proven. 278 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-12-06 17:49:52,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:49:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 41 proven. 451 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-06 17:49:57,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340163287] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:49:57,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:49:57,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 30, 45] total 92 [2021-12-06 17:49:57,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765062682] [2021-12-06 17:49:57,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:49:57,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-06 17:49:57,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:57,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-06 17:49:57,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=8036, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 17:49:57,324 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 92 states, 88 states have (on average 1.3977272727272727) internal successors, (123), 53 states have internal predecessors, (123), 18 states have call successors, (18), 1 states have call predecessors, (18), 27 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) [2021-12-06 17:49:59,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:59,658 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2021-12-06 17:49:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 17:49:59,658 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 88 states have (on average 1.3977272727272727) internal successors, (123), 53 states have internal predecessors, (123), 18 states have call successors, (18), 1 states have call predecessors, (18), 27 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) Word has length 104 [2021-12-06 17:49:59,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:59,659 INFO L225 Difference]: With dead ends: 116 [2021-12-06 17:49:59,659 INFO L226 Difference]: Without dead ends: 109 [2021-12-06 17:49:59,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 176 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3338 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1080, Invalid=14420, Unknown=0, NotChecked=0, Total=15500 [2021-12-06 17:49:59,661 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 114 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 3071 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 3258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 3071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:59,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 1034 Invalid, 3258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 3071 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 17:49:59,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-06 17:49:59,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 94. [2021-12-06 17:49:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 8 states have call successors, (8), 3 states have call predecessors, (8), 22 states have return successors, (42), 26 states have call predecessors, (42), 8 states have call successors, (42) [2021-12-06 17:49:59,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2021-12-06 17:49:59,666 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 104 [2021-12-06 17:49:59,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:59,667 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2021-12-06 17:49:59,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 88 states have (on average 1.3977272727272727) internal successors, (123), 53 states have internal predecessors, (123), 18 states have call successors, (18), 1 states have call predecessors, (18), 27 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) [2021-12-06 17:49:59,667 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2021-12-06 17:49:59,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 17:49:59,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:59,671 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:59,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 17:49:59,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 17:49:59,873 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:59,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:59,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1444557372, now seen corresponding path program 22 times [2021-12-06 17:49:59,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:59,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818584828] [2021-12-06 17:49:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:59,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:59,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:49:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:59,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:00,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:00,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:00,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:00,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:00,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:00,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:00,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:00,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 17:50:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:00,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:00,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 215 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-06 17:50:00,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:00,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818584828] [2021-12-06 17:50:00,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818584828] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:00,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957092547] [2021-12-06 17:50:00,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:50:00,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:00,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:00,508 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:00,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 17:50:00,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:50:00,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:00,610 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-06 17:50:00,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 21 proven. 210 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-06 17:50:01,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 8 proven. 336 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-06 17:50:05,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957092547] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:05,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:05,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 37] total 80 [2021-12-06 17:50:05,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978174766] [2021-12-06 17:50:05,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:05,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 17:50:05,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:05,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 17:50:05,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=6006, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 17:50:05,192 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 80 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 49 states have internal predecessors, (107), 15 states have call successors, (15), 1 states have call predecessors, (15), 23 states have return successors, (34), 31 states have call predecessors, (34), 15 states have call successors, (34) [2021-12-06 17:50:07,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:07,332 INFO L93 Difference]: Finished difference Result 121 states and 156 transitions. [2021-12-06 17:50:07,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 17:50:07,333 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 49 states have internal predecessors, (107), 15 states have call successors, (15), 1 states have call predecessors, (15), 23 states have return successors, (34), 31 states have call predecessors, (34), 15 states have call successors, (34) Word has length 90 [2021-12-06 17:50:07,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:07,334 INFO L225 Difference]: With dead ends: 121 [2021-12-06 17:50:07,334 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 17:50:07,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 144 SyntacticMatches, 12 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3212 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1174, Invalid=11936, Unknown=0, NotChecked=0, Total=13110 [2021-12-06 17:50:07,335 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 111 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:07,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 596 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:50:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 17:50:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 92. [2021-12-06 17:50:07,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 63 states have internal predecessors, (65), 7 states have call successors, (7), 3 states have call predecessors, (7), 22 states have return successors, (40), 25 states have call predecessors, (40), 7 states have call successors, (40) [2021-12-06 17:50:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2021-12-06 17:50:07,341 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 90 [2021-12-06 17:50:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:07,341 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2021-12-06 17:50:07,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 49 states have internal predecessors, (107), 15 states have call successors, (15), 1 states have call predecessors, (15), 23 states have return successors, (34), 31 states have call predecessors, (34), 15 states have call successors, (34) [2021-12-06 17:50:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2021-12-06 17:50:07,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 17:50:07,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:07,342 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:07,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 17:50:07,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 17:50:07,543 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:07,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:07,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1958411874, now seen corresponding path program 23 times [2021-12-06 17:50:07,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:07,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283273726] [2021-12-06 17:50:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:07,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:50:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 17:50:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:08,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:08,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:08,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:08,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:08,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:08,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:08,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-12-06 17:50:08,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:08,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283273726] [2021-12-06 17:50:08,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283273726] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:08,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393051023] [2021-12-06 17:50:08,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:50:08,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:08,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:08,475 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:08,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 17:50:08,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-12-06 17:50:08,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:08,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 193 conjunts are in the unsatisfiable core [2021-12-06 17:50:08,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 354 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-12-06 17:50:09,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:31,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393051023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:31,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:50:31,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 32] total 68 [2021-12-06 17:50:31,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614672172] [2021-12-06 17:50:31,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:31,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 17:50:31,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:31,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 17:50:31,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=10119, Unknown=7, NotChecked=0, Total=10506 [2021-12-06 17:50:31,914 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 68 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 39 states have internal predecessors, (76), 5 states have call successors, (5), 1 states have call predecessors, (5), 28 states have return successors, (29), 29 states have call predecessors, (29), 5 states have call successors, (29) [2021-12-06 17:50:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:33,428 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2021-12-06 17:50:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 17:50:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 39 states have internal predecessors, (76), 5 states have call successors, (5), 1 states have call predecessors, (5), 28 states have return successors, (29), 29 states have call predecessors, (29), 5 states have call successors, (29) Word has length 118 [2021-12-06 17:50:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:33,429 INFO L225 Difference]: With dead ends: 108 [2021-12-06 17:50:33,429 INFO L226 Difference]: Without dead ends: 104 [2021-12-06 17:50:33,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 173 SyntacticMatches, 15 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3807 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=1013, Invalid=15236, Unknown=7, NotChecked=0, Total=16256 [2021-12-06 17:50:33,430 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:33,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 832 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2128 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:50:33,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-06 17:50:33,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2021-12-06 17:50:33,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 66 states have internal predecessors, (68), 8 states have call successors, (8), 3 states have call predecessors, (8), 23 states have return successors, (46), 27 states have call predecessors, (46), 8 states have call successors, (46) [2021-12-06 17:50:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2021-12-06 17:50:33,437 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 118 [2021-12-06 17:50:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:33,438 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2021-12-06 17:50:33,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 39 states have internal predecessors, (76), 5 states have call successors, (5), 1 states have call predecessors, (5), 28 states have return successors, (29), 29 states have call predecessors, (29), 5 states have call successors, (29) [2021-12-06 17:50:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2021-12-06 17:50:33,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 17:50:33,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:33,439 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:33,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 17:50:33,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 17:50:33,640 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:33,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:33,641 INFO L85 PathProgramCache]: Analyzing trace with hash -80896216, now seen corresponding path program 24 times [2021-12-06 17:50:33,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:33,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900068150] [2021-12-06 17:50:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:33,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:33,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:50:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:33,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:33,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:33,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:33,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:33,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:50:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:33,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:34,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:34,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:34,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:34,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:34,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:34,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:34,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:34,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:34,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:34,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-12-06 17:50:34,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:34,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900068150] [2021-12-06 17:50:34,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900068150] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:34,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364021234] [2021-12-06 17:50:34,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:50:34,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:34,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:34,718 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:34,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 17:50:34,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-06 17:50:34,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:50:34,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 205 conjunts are in the unsatisfiable core [2021-12-06 17:50:34,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 11 proven. 412 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-12-06 17:50:36,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:57,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364021234] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:57,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:50:57,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 32] total 70 [2021-12-06 17:50:57,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037529147] [2021-12-06 17:50:57,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:57,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 17:50:57,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:57,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 17:50:57,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=10526, Unknown=6, NotChecked=0, Total=10920 [2021-12-06 17:50:57,946 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand has 70 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 40 states have internal predecessors, (77), 5 states have call successors, (5), 1 states have call predecessors, (5), 29 states have return successors, (30), 30 states have call predecessors, (30), 5 states have call successors, (30) [2021-12-06 17:50:59,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:59,719 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2021-12-06 17:50:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 17:50:59,719 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 40 states have internal predecessors, (77), 5 states have call successors, (5), 1 states have call predecessors, (5), 29 states have return successors, (30), 30 states have call predecessors, (30), 5 states have call successors, (30) Word has length 125 [2021-12-06 17:50:59,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:59,720 INFO L225 Difference]: With dead ends: 110 [2021-12-06 17:50:59,720 INFO L226 Difference]: Without dead ends: 106 [2021-12-06 17:50:59,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 194 SyntacticMatches, 3 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3377 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=1023, Invalid=15741, Unknown=6, NotChecked=0, Total=16770 [2021-12-06 17:50:59,722 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 2117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:59,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 952 Invalid, 2117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:50:59,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-06 17:50:59,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2021-12-06 17:50:59,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 66 states have internal predecessors, (68), 8 states have call successors, (8), 3 states have call predecessors, (8), 23 states have return successors, (46), 27 states have call predecessors, (46), 8 states have call successors, (46) [2021-12-06 17:50:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2021-12-06 17:50:59,728 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 125 [2021-12-06 17:50:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:59,729 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2021-12-06 17:50:59,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 40 states have internal predecessors, (77), 5 states have call successors, (5), 1 states have call predecessors, (5), 29 states have return successors, (30), 30 states have call predecessors, (30), 5 states have call successors, (30) [2021-12-06 17:50:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2021-12-06 17:50:59,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 17:50:59,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:59,730 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:59,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 17:50:59,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:59,931 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:59,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:59,934 INFO L85 PathProgramCache]: Analyzing trace with hash 200427544, now seen corresponding path program 25 times [2021-12-06 17:50:59,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:59,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334074893] [2021-12-06 17:50:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:59,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:51:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:51:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-06 17:51:00,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:00,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334074893] [2021-12-06 17:51:00,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334074893] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:00,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361487335] [2021-12-06 17:51:00,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:51:00,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:00,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:00,847 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:00,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 17:51:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:00,967 WARN L261 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 181 conjunts are in the unsatisfiable core [2021-12-06 17:51:00,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 11 proven. 321 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2021-12-06 17:51:02,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:10,258 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_414_93| Int) (v_mult_~n_BEFORE_CALL_414 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| Int)) (let ((.cse0 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| (* 11 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139|))) (.cse1 (div (+ (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| (- 22)) (* |c_mult_#res| 2) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| (- 2)) (* v_mult_~n_BEFORE_CALL_414 2)) (- 11))) (.cse2 (div (+ (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| 22) (* v_mult_~n_BEFORE_CALL_414 (- 2)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| 2) (* |c_mult_#res| (- 2))) 11))) (or (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| 0) (< (+ |c_mult_#res| (* 11 |aux_div_v_mult_#in~n_BEFORE_CALL_414_93|)) .cse0) (< (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113| 1) .cse1) (< .cse0 (+ |c_mult_#res| (* 11 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113|))) (<= .cse1 (+ |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| 1)) (< .cse1 (+ 2 .cse2)) (<= 11 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139|) (< (+ .cse2 1) |aux_div_v_mult_#in~n_BEFORE_CALL_414_93|)))) (<= 0 |c_mult_#in~m|) (forall ((|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_414_93| Int) (v_mult_~n_BEFORE_CALL_414 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113| Int)) (let ((.cse6 (div (+ (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| 22) (* v_mult_~n_BEFORE_CALL_414 (- 2)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| (- 2)) (* |c_mult_#res| (- 2))) 11))) (let ((.cse5 (* 11 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167|)) (.cse4 (div (+ (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| (- 22)) (* |c_mult_#res| 2) (* v_mult_~n_BEFORE_CALL_414 2) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| 2)) (- 11))) (.cse3 (+ .cse6 1))) (or (<= |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| .cse3) (< (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113| 1) .cse4) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| 0) (< (+ |c_mult_#res| |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| (* 11 |aux_div_v_mult_#in~n_BEFORE_CALL_414_93|)) .cse5) (< .cse5 (+ |c_mult_#res| |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| (* 11 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113|))) (< .cse4 (+ 2 .cse6)) (< .cse3 |aux_div_v_mult_#in~n_BEFORE_CALL_414_93|) (<= 11 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167|))))) (<= |c_mult_#in~m| 0)) is different from false [2021-12-06 17:51:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 44 proven. 502 refuted. 0 times theorem prover too weak. 107 trivial. 28 not checked. [2021-12-06 17:51:10,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361487335] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:10,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:10,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32, 49] total 99 [2021-12-06 17:51:10,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058445363] [2021-12-06 17:51:10,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:10,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-06 17:51:10,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:10,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-06 17:51:10,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=9149, Unknown=1, NotChecked=192, Total=9702 [2021-12-06 17:51:10,687 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand has 99 states, 95 states have (on average 1.4) internal successors, (133), 57 states have internal predecessors, (133), 19 states have call successors, (19), 1 states have call predecessors, (19), 30 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) [2021-12-06 17:51:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:13,649 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2021-12-06 17:51:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 17:51:13,649 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 95 states have (on average 1.4) internal successors, (133), 57 states have internal predecessors, (133), 19 states have call successors, (19), 1 states have call predecessors, (19), 30 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) Word has length 111 [2021-12-06 17:51:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:13,650 INFO L225 Difference]: With dead ends: 118 [2021-12-06 17:51:13,650 INFO L226 Difference]: Without dead ends: 111 [2021-12-06 17:51:13,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3663 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1182, Invalid=16113, Unknown=1, NotChecked=260, Total=17556 [2021-12-06 17:51:13,651 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 107 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 3848 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 4124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 3848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:13,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 1223 Invalid, 4124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 3848 Invalid, 0 Unknown, 76 Unchecked, 1.6s Time] [2021-12-06 17:51:13,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-06 17:51:13,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 98. [2021-12-06 17:51:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 67 states have internal predecessors, (69), 7 states have call successors, (7), 3 states have call predecessors, (7), 24 states have return successors, (43), 27 states have call predecessors, (43), 7 states have call successors, (43) [2021-12-06 17:51:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2021-12-06 17:51:13,657 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 111 [2021-12-06 17:51:13,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:13,657 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2021-12-06 17:51:13,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 95 states have (on average 1.4) internal successors, (133), 57 states have internal predecessors, (133), 19 states have call successors, (19), 1 states have call predecessors, (19), 30 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) [2021-12-06 17:51:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2021-12-06 17:51:13,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 17:51:13,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:13,658 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:13,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 17:51:13,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 17:51:13,860 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:13,861 INFO L85 PathProgramCache]: Analyzing trace with hash -313901386, now seen corresponding path program 26 times [2021-12-06 17:51:13,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:13,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845181017] [2021-12-06 17:51:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:13,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:13,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:51:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:13,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:13,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 17:51:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-12-06 17:51:14,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:14,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845181017] [2021-12-06 17:51:14,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845181017] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:14,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597787827] [2021-12-06 17:51:14,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:51:14,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:14,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:14,891 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:14,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 17:51:15,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:51:15,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:15,023 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 205 conjunts are in the unsatisfiable core [2021-12-06 17:51:15,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 12 proven. 414 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2021-12-06 17:51:16,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:36,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597787827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:36,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:51:36,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 34] total 72 [2021-12-06 17:51:36,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190713433] [2021-12-06 17:51:36,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:36,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 17:51:36,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:36,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 17:51:36,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=11365, Unknown=5, NotChecked=0, Total=11772 [2021-12-06 17:51:36,651 INFO L87 Difference]: Start difference. First operand 98 states and 119 transitions. Second operand has 72 states, 69 states have (on average 1.144927536231884) internal successors, (79), 41 states have internal predecessors, (79), 5 states have call successors, (5), 1 states have call predecessors, (5), 30 states have return successors, (31), 31 states have call predecessors, (31), 5 states have call successors, (31) [2021-12-06 17:51:38,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:38,787 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2021-12-06 17:51:38,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 17:51:38,787 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 69 states have (on average 1.144927536231884) internal successors, (79), 41 states have internal predecessors, (79), 5 states have call successors, (5), 1 states have call predecessors, (5), 30 states have return successors, (31), 31 states have call predecessors, (31), 5 states have call successors, (31) Word has length 125 [2021-12-06 17:51:38,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:38,788 INFO L225 Difference]: With dead ends: 114 [2021-12-06 17:51:38,788 INFO L226 Difference]: Without dead ends: 110 [2021-12-06 17:51:38,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 197 SyntacticMatches, 3 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3821 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=1113, Invalid=17242, Unknown=5, NotChecked=0, Total=18360 [2021-12-06 17:51:38,790 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 70 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 2644 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:38,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1190 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2644 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:51:38,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-06 17:51:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2021-12-06 17:51:38,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 8 states have call successors, (8), 3 states have call predecessors, (8), 25 states have return successors, (49), 29 states have call predecessors, (49), 8 states have call successors, (49) [2021-12-06 17:51:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2021-12-06 17:51:38,798 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 125 [2021-12-06 17:51:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:38,799 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2021-12-06 17:51:38,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 69 states have (on average 1.144927536231884) internal successors, (79), 41 states have internal predecessors, (79), 5 states have call successors, (5), 1 states have call predecessors, (5), 30 states have return successors, (31), 31 states have call predecessors, (31), 5 states have call successors, (31) [2021-12-06 17:51:38,799 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2021-12-06 17:51:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-06 17:51:38,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:38,800 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:38,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-06 17:51:39,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 17:51:39,000 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:39,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:39,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1615409644, now seen corresponding path program 27 times [2021-12-06 17:51:39,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:39,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605392092] [2021-12-06 17:51:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:39,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:51:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:51:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:39,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:40,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:40,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:51:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-12-06 17:51:40,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:40,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605392092] [2021-12-06 17:51:40,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605392092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:40,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761801322] [2021-12-06 17:51:40,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:51:40,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:40,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:40,175 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:40,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 17:51:40,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-06 17:51:40,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:40,357 WARN L261 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 216 conjunts are in the unsatisfiable core [2021-12-06 17:51:40,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 34 proven. 476 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-12-06 17:51:42,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:04,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761801322] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:04,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:52:04,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 38] total 76 [2021-12-06 17:52:04,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283574769] [2021-12-06 17:52:04,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:04,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-06 17:52:04,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:04,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-06 17:52:04,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=12228, Unknown=6, NotChecked=0, Total=12656 [2021-12-06 17:52:04,832 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand has 76 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 44 states have internal predecessors, (85), 5 states have call successors, (5), 1 states have call predecessors, (5), 32 states have return successors, (33), 32 states have call predecessors, (33), 5 states have call successors, (33) [2021-12-06 17:52:06,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:06,994 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2021-12-06 17:52:06,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 17:52:06,994 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 44 states have internal predecessors, (85), 5 states have call successors, (5), 1 states have call predecessors, (5), 32 states have return successors, (33), 32 states have call predecessors, (33), 5 states have call successors, (33) Word has length 132 [2021-12-06 17:52:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:06,995 INFO L225 Difference]: With dead ends: 116 [2021-12-06 17:52:06,995 INFO L226 Difference]: Without dead ends: 112 [2021-12-06 17:52:06,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 190 SyntacticMatches, 17 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4479 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=1161, Invalid=18293, Unknown=6, NotChecked=0, Total=19460 [2021-12-06 17:52:06,997 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 2802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:06,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1076 Invalid, 2802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:52:06,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-06 17:52:07,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2021-12-06 17:52:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 8 states have call successors, (8), 3 states have call predecessors, (8), 25 states have return successors, (49), 29 states have call predecessors, (49), 8 states have call successors, (49) [2021-12-06 17:52:07,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2021-12-06 17:52:07,004 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 132 [2021-12-06 17:52:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:07,004 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2021-12-06 17:52:07,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 44 states have internal predecessors, (85), 5 states have call successors, (5), 1 states have call predecessors, (5), 32 states have return successors, (33), 32 states have call predecessors, (33), 5 states have call successors, (33) [2021-12-06 17:52:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2021-12-06 17:52:07,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 17:52:07,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:07,007 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:07,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 17:52:07,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:07,209 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:07,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:07,211 INFO L85 PathProgramCache]: Analyzing trace with hash -745432324, now seen corresponding path program 28 times [2021-12-06 17:52:07,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:07,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168371840] [2021-12-06 17:52:07,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:07,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:52:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:52:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:08,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:08,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-12-06 17:52:08,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:08,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168371840] [2021-12-06 17:52:08,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168371840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:08,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346669633] [2021-12-06 17:52:08,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:52:08,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:08,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:08,154 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:52:08,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 17:52:08,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:52:08,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:52:08,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 193 conjunts are in the unsatisfiable core [2021-12-06 17:52:08,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 12 proven. 367 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-12-06 17:52:09,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 47 proven. 611 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-06 17:52:15,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346669633] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:15,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:52:15,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 34, 51] total 104 [2021-12-06 17:52:15,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87178110] [2021-12-06 17:52:15,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:15,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-06 17:52:15,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:15,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-06 17:52:15,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=10332, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 17:52:15,959 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand has 104 states, 100 states have (on average 1.39) internal successors, (139), 59 states have internal predecessors, (139), 20 states have call successors, (20), 1 states have call predecessors, (20), 31 states have return successors, (46), 45 states have call predecessors, (46), 20 states have call successors, (46) [2021-12-06 17:52:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:18,900 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2021-12-06 17:52:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 17:52:18,900 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 100 states have (on average 1.39) internal successors, (139), 59 states have internal predecessors, (139), 20 states have call successors, (20), 1 states have call predecessors, (20), 31 states have return successors, (46), 45 states have call predecessors, (46), 20 states have call successors, (46) Word has length 118 [2021-12-06 17:52:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:18,901 INFO L225 Difference]: With dead ends: 124 [2021-12-06 17:52:18,901 INFO L226 Difference]: Without dead ends: 117 [2021-12-06 17:52:18,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4186 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1288, Invalid=18172, Unknown=0, NotChecked=0, Total=19460 [2021-12-06 17:52:18,902 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 98 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 4030 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 4178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 4030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:18,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1277 Invalid, 4178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 4030 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 17:52:18,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-06 17:52:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 104. [2021-12-06 17:52:18,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 70 states have (on average 1.042857142857143) internal successors, (73), 71 states have internal predecessors, (73), 7 states have call successors, (7), 3 states have call predecessors, (7), 26 states have return successors, (46), 29 states have call predecessors, (46), 7 states have call successors, (46) [2021-12-06 17:52:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2021-12-06 17:52:18,912 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 118 [2021-12-06 17:52:18,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:18,912 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2021-12-06 17:52:18,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 100 states have (on average 1.39) internal successors, (139), 59 states have internal predecessors, (139), 20 states have call successors, (20), 1 states have call predecessors, (20), 31 states have return successors, (46), 45 states have call predecessors, (46), 20 states have call successors, (46) [2021-12-06 17:52:18,912 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2021-12-06 17:52:18,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 17:52:18,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:18,914 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:18,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 17:52:19,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-06 17:52:19,115 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:19,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:19,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1149117496, now seen corresponding path program 29 times [2021-12-06 17:52:19,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:19,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484423961] [2021-12-06 17:52:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:19,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:19,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:52:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:19,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:19,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:19,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:52:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:19,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:19,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:19,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:19,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:19,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:19,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:19,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:19,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:19,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:19,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:20,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:20,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:20,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-12-06 17:52:20,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:20,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484423961] [2021-12-06 17:52:20,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484423961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:20,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198855355] [2021-12-06 17:52:20,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:52:20,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:20,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:20,213 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:52:20,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 17:52:20,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-12-06 17:52:20,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:52:20,383 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 205 conjunts are in the unsatisfiable core [2021-12-06 17:52:20,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 27 proven. 403 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2021-12-06 17:52:21,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 51 proven. 700 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 17:52:28,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198855355] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:52:28,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:52:28,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 36, 54] total 110 [2021-12-06 17:52:28,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223849788] [2021-12-06 17:52:28,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:28,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-06 17:52:28,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:28,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-06 17:52:28,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=11588, Unknown=0, NotChecked=0, Total=11990 [2021-12-06 17:52:28,945 INFO L87 Difference]: Start difference. First operand 104 states and 126 transitions. Second operand has 110 states, 106 states have (on average 1.4150943396226414) internal successors, (150), 62 states have internal predecessors, (150), 21 states have call successors, (21), 1 states have call predecessors, (21), 33 states have return successors, (49), 48 states have call predecessors, (49), 21 states have call successors, (49) [2021-12-06 17:52:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:31,764 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2021-12-06 17:52:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 17:52:31,765 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 106 states have (on average 1.4150943396226414) internal successors, (150), 62 states have internal predecessors, (150), 21 states have call successors, (21), 1 states have call predecessors, (21), 33 states have return successors, (49), 48 states have call predecessors, (49), 21 states have call successors, (49) Word has length 125 [2021-12-06 17:52:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:31,766 INFO L225 Difference]: With dead ends: 128 [2021-12-06 17:52:31,766 INFO L226 Difference]: Without dead ends: 121 [2021-12-06 17:52:31,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 197 SyntacticMatches, 19 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5329 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1400, Invalid=20356, Unknown=0, NotChecked=0, Total=21756 [2021-12-06 17:52:31,767 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 56 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 3795 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 3898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 3795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:31,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1156 Invalid, 3898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 3795 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 17:52:31,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-06 17:52:31,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2021-12-06 17:52:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 75 states have internal predecessors, (77), 7 states have call successors, (7), 3 states have call predecessors, (7), 28 states have return successors, (49), 31 states have call predecessors, (49), 7 states have call successors, (49) [2021-12-06 17:52:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2021-12-06 17:52:31,773 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 125 [2021-12-06 17:52:31,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:31,774 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2021-12-06 17:52:31,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 106 states have (on average 1.4150943396226414) internal successors, (150), 62 states have internal predecessors, (150), 21 states have call successors, (21), 1 states have call predecessors, (21), 33 states have return successors, (49), 48 states have call predecessors, (49), 21 states have call successors, (49) [2021-12-06 17:52:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2021-12-06 17:52:31,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 17:52:31,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:31,775 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:31,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 17:52:31,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 17:52:31,975 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:31,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash -742889082, now seen corresponding path program 30 times [2021-12-06 17:52:31,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:31,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418527561] [2021-12-06 17:52:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:31,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:52:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 17:52:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:33,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:33,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2021-12-06 17:52:33,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:33,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418527561] [2021-12-06 17:52:33,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418527561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:33,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434262559] [2021-12-06 17:52:33,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:52:33,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:33,197 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:52:33,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 17:52:33,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-06 17:52:33,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:52:33,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 229 conjunts are in the unsatisfiable core [2021-12-06 17:52:33,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:52:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 29 proven. 507 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2021-12-06 17:52:35,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:52:56,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434262559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:56,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:52:56,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 38] total 80 [2021-12-06 17:52:56,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839574395] [2021-12-06 17:52:56,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:52:56,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 17:52:56,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:56,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 17:52:56,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=14070, Unknown=4, NotChecked=0, Total=14520 [2021-12-06 17:52:56,255 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand has 80 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 45 states have internal predecessors, (88), 5 states have call successors, (5), 1 states have call predecessors, (5), 34 states have return successors, (35), 35 states have call predecessors, (35), 5 states have call successors, (35) [2021-12-06 17:52:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:58,347 INFO L93 Difference]: Finished difference Result 126 states and 154 transitions. [2021-12-06 17:52:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 17:52:58,347 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 45 states have internal predecessors, (88), 5 states have call successors, (5), 1 states have call predecessors, (5), 34 states have return successors, (35), 35 states have call predecessors, (35), 5 states have call successors, (35) Word has length 139 [2021-12-06 17:52:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:58,348 INFO L225 Difference]: With dead ends: 126 [2021-12-06 17:52:58,348 INFO L226 Difference]: Without dead ends: 122 [2021-12-06 17:52:58,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 205 SyntacticMatches, 19 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5527 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=1325, Invalid=21623, Unknown=4, NotChecked=0, Total=22952 [2021-12-06 17:52:58,350 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 2761 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 2776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:58,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1207 Invalid, 2776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2761 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:52:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-06 17:52:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2021-12-06 17:52:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 states have internal predecessors, (80), 8 states have call successors, (8), 3 states have call predecessors, (8), 29 states have return successors, (55), 33 states have call predecessors, (55), 8 states have call successors, (55) [2021-12-06 17:52:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 143 transitions. [2021-12-06 17:52:58,357 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 143 transitions. Word has length 139 [2021-12-06 17:52:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:58,357 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 143 transitions. [2021-12-06 17:52:58,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 45 states have internal predecessors, (88), 5 states have call successors, (5), 1 states have call predecessors, (5), 34 states have return successors, (35), 35 states have call predecessors, (35), 5 states have call successors, (35) [2021-12-06 17:52:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 143 transitions. [2021-12-06 17:52:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 17:52:58,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:58,358 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:58,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-06 17:52:58,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-06 17:52:58,560 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:58,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:58,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1817871932, now seen corresponding path program 31 times [2021-12-06 17:52:58,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:58,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480297040] [2021-12-06 17:52:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:58,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:58,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:52:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:58,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:58,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:58,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:58,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:58,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:52:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:58,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:58,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:59,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:59,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:59,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:59,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:59,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:59,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:59,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:59,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:59,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:59,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:59,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:59,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:52:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 68 proven. 601 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2021-12-06 17:52:59,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:59,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480297040] [2021-12-06 17:52:59,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480297040] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:59,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233423326] [2021-12-06 17:52:59,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:52:59,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:59,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:59,960 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:52:59,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 17:53:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:00,150 WARN L261 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 241 conjunts are in the unsatisfiable core [2021-12-06 17:53:00,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 14 proven. 577 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2021-12-06 17:53:02,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:27,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233423326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:27,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:53:27,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 38] total 82 [2021-12-06 17:53:27,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704365856] [2021-12-06 17:53:27,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:27,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 17:53:27,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:27,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 17:53:27,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=14545, Unknown=7, NotChecked=0, Total=15006 [2021-12-06 17:53:27,200 INFO L87 Difference]: Start difference. First operand 115 states and 143 transitions. Second operand has 82 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 46 states have internal predecessors, (89), 5 states have call successors, (5), 1 states have call predecessors, (5), 35 states have return successors, (36), 36 states have call predecessors, (36), 5 states have call successors, (36) [2021-12-06 17:53:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:30,008 INFO L93 Difference]: Finished difference Result 128 states and 157 transitions. [2021-12-06 17:53:30,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 17:53:30,008 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 46 states have internal predecessors, (89), 5 states have call successors, (5), 1 states have call predecessors, (5), 35 states have return successors, (36), 36 states have call predecessors, (36), 5 states have call successors, (36) Word has length 146 [2021-12-06 17:53:30,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:30,010 INFO L225 Difference]: With dead ends: 128 [2021-12-06 17:53:30,010 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 17:53:30,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4796 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=1335, Invalid=22220, Unknown=7, NotChecked=0, Total=23562 [2021-12-06 17:53:30,012 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 3494 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 3568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:30,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1497 Invalid, 3568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3494 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 17:53:30,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 17:53:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2021-12-06 17:53:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 states have internal predecessors, (80), 8 states have call successors, (8), 3 states have call predecessors, (8), 29 states have return successors, (55), 33 states have call predecessors, (55), 8 states have call successors, (55) [2021-12-06 17:53:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 143 transitions. [2021-12-06 17:53:30,024 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 143 transitions. Word has length 146 [2021-12-06 17:53:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:30,024 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 143 transitions. [2021-12-06 17:53:30,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 46 states have internal predecessors, (89), 5 states have call successors, (5), 1 states have call predecessors, (5), 35 states have return successors, (36), 36 states have call predecessors, (36), 5 states have call successors, (36) [2021-12-06 17:53:30,024 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 143 transitions. [2021-12-06 17:53:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-06 17:53:30,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:30,026 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:30,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 17:53:30,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 17:53:30,227 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:30,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:30,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1882563946, now seen corresponding path program 32 times [2021-12-06 17:53:30,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:30,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096436150] [2021-12-06 17:53:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:30,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:30,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:53:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:30,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:30,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:30,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:30,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:30,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:30,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 17:53:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:30,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:30,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:30,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:30,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:30,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:30,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:31,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:31,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:31,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:31,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:31,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:31,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:31,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:31,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:53:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 72 proven. 663 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2021-12-06 17:53:31,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:31,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096436150] [2021-12-06 17:53:31,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096436150] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:31,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751503160] [2021-12-06 17:53:31,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:53:31,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:31,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:31,760 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:31,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 17:53:31,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:53:31,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:31,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 253 conjunts are in the unsatisfiable core [2021-12-06 17:53:31,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 14 proven. 636 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2021-12-06 17:53:34,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:12,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751503160] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:12,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:54:12,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 38] total 84 [2021-12-06 17:54:12,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387586606] [2021-12-06 17:54:12,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:12,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-06 17:54:12,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-06 17:54:12,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=15029, Unknown=9, NotChecked=0, Total=15500 [2021-12-06 17:54:12,302 INFO L87 Difference]: Start difference. First operand 115 states and 143 transitions. Second operand has 84 states, 81 states have (on average 1.123456790123457) internal successors, (91), 47 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 36 states have return successors, (37), 37 states have call predecessors, (37), 5 states have call successors, (37) [2021-12-06 17:54:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:15,187 INFO L93 Difference]: Finished difference Result 128 states and 157 transitions. [2021-12-06 17:54:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 17:54:15,187 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 81 states have (on average 1.123456790123457) internal successors, (91), 47 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 36 states have return successors, (37), 37 states have call predecessors, (37), 5 states have call successors, (37) Word has length 153 [2021-12-06 17:54:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:15,188 INFO L225 Difference]: With dead ends: 128 [2021-12-06 17:54:15,188 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 17:54:15,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 238 SyntacticMatches, 4 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4874 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=1345, Invalid=22826, Unknown=9, NotChecked=0, Total=24180 [2021-12-06 17:54:15,190 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 3339 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 3357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:15,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1369 Invalid, 3357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3339 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 17:54:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 17:54:15,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2021-12-06 17:54:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 states have internal predecessors, (80), 8 states have call successors, (8), 3 states have call predecessors, (8), 29 states have return successors, (55), 33 states have call predecessors, (55), 8 states have call successors, (55) [2021-12-06 17:54:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 143 transitions. [2021-12-06 17:54:15,197 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 143 transitions. Word has length 153 [2021-12-06 17:54:15,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:15,198 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 143 transitions. [2021-12-06 17:54:15,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 81 states have (on average 1.123456790123457) internal successors, (91), 47 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 36 states have return successors, (37), 37 states have call predecessors, (37), 5 states have call successors, (37) [2021-12-06 17:54:15,198 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 143 transitions. [2021-12-06 17:54:15,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-06 17:54:15,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:15,199 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:15,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 17:54:15,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:15,399 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:15,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:15,400 INFO L85 PathProgramCache]: Analyzing trace with hash 502125388, now seen corresponding path program 33 times [2021-12-06 17:54:15,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:15,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29478061] [2021-12-06 17:54:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:15,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:15,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:54:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:15,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:15,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:15,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:54:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:15,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:15,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:15,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:15,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:15,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:15,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:15,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:16,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:16,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:16,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:16,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:16,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:16,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:16,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-12-06 17:54:16,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:16,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29478061] [2021-12-06 17:54:16,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29478061] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:16,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712530106] [2021-12-06 17:54:16,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:54:16,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:16,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:16,573 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:16,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 17:54:16,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-06 17:54:16,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:16,801 WARN L261 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 217 conjunts are in the unsatisfiable core [2021-12-06 17:54:16,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 14 proven. 468 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2021-12-06 17:54:18,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 53 proven. 795 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-06 17:54:26,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712530106] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:26,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:26,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 38, 57] total 116 [2021-12-06 17:54:26,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179112637] [2021-12-06 17:54:26,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:26,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-06 17:54:26,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:26,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-06 17:54:26,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=12916, Unknown=0, NotChecked=0, Total=13340 [2021-12-06 17:54:26,269 INFO L87 Difference]: Start difference. First operand 115 states and 143 transitions. Second operand has 116 states, 112 states have (on average 1.3839285714285714) internal successors, (155), 65 states have internal predecessors, (155), 22 states have call successors, (22), 1 states have call predecessors, (22), 35 states have return successors, (52), 51 states have call predecessors, (52), 22 states have call successors, (52) [2021-12-06 17:54:29,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:29,794 INFO L93 Difference]: Finished difference Result 136 states and 169 transitions. [2021-12-06 17:54:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 17:54:29,794 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 112 states have (on average 1.3839285714285714) internal successors, (155), 65 states have internal predecessors, (155), 22 states have call successors, (22), 1 states have call predecessors, (22), 35 states have return successors, (52), 51 states have call predecessors, (52), 22 states have call successors, (52) Word has length 132 [2021-12-06 17:54:29,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:29,795 INFO L225 Difference]: With dead ends: 136 [2021-12-06 17:54:29,795 INFO L226 Difference]: Without dead ends: 129 [2021-12-06 17:54:29,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 224 SyntacticMatches, 4 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5209 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1516, Invalid=22664, Unknown=0, NotChecked=0, Total=24180 [2021-12-06 17:54:29,797 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 4902 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 4983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 4902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:29,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1568 Invalid, 4983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 4902 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 17:54:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-06 17:54:29,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 116. [2021-12-06 17:54:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 79 states have internal predecessors, (81), 7 states have call successors, (7), 3 states have call predecessors, (7), 30 states have return successors, (52), 33 states have call predecessors, (52), 7 states have call successors, (52) [2021-12-06 17:54:29,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 140 transitions. [2021-12-06 17:54:29,803 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 140 transitions. Word has length 132 [2021-12-06 17:54:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:29,804 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 140 transitions. [2021-12-06 17:54:29,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 112 states have (on average 1.3839285714285714) internal successors, (155), 65 states have internal predecessors, (155), 22 states have call successors, (22), 1 states have call predecessors, (22), 35 states have return successors, (52), 51 states have call predecessors, (52), 22 states have call successors, (52) [2021-12-06 17:54:29,804 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 140 transitions. [2021-12-06 17:54:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 17:54:29,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:29,805 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:29,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-06 17:54:30,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 17:54:30,005 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:30,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:30,006 INFO L85 PathProgramCache]: Analyzing trace with hash -219998344, now seen corresponding path program 34 times [2021-12-06 17:54:30,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:30,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956340749] [2021-12-06 17:54:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:30,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:54:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:54:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:31,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:31,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:31,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:31,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2021-12-06 17:54:31,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:31,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956340749] [2021-12-06 17:54:31,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956340749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:31,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792604004] [2021-12-06 17:54:31,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:54:31,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:31,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:31,309 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:31,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 17:54:31,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:54:31,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:31,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 229 conjunts are in the unsatisfiable core [2021-12-06 17:54:31,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 15 proven. 523 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2021-12-06 17:54:33,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 56 proven. 896 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-06 17:54:42,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792604004] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:42,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:42,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 40, 60] total 122 [2021-12-06 17:54:42,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823623939] [2021-12-06 17:54:42,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:42,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-12-06 17:54:42,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:42,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-12-06 17:54:42,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=14316, Unknown=0, NotChecked=0, Total=14762 [2021-12-06 17:54:42,039 INFO L87 Difference]: Start difference. First operand 116 states and 140 transitions. Second operand has 122 states, 118 states have (on average 1.38135593220339) internal successors, (163), 68 states have internal predecessors, (163), 23 states have call successors, (23), 1 states have call predecessors, (23), 37 states have return successors, (55), 54 states have call predecessors, (55), 23 states have call successors, (55) [2021-12-06 17:54:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:45,854 INFO L93 Difference]: Finished difference Result 140 states and 173 transitions. [2021-12-06 17:54:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 17:54:45,854 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 118 states have (on average 1.38135593220339) internal successors, (163), 68 states have internal predecessors, (163), 23 states have call successors, (23), 1 states have call predecessors, (23), 37 states have return successors, (55), 54 states have call predecessors, (55), 23 states have call successors, (55) Word has length 139 [2021-12-06 17:54:45,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:45,855 INFO L225 Difference]: With dead ends: 140 [2021-12-06 17:54:45,855 INFO L226 Difference]: Without dead ends: 133 [2021-12-06 17:54:45,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 236 SyntacticMatches, 4 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5760 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1636, Invalid=25096, Unknown=0, NotChecked=0, Total=26732 [2021-12-06 17:54:45,857 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 124 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 4951 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 5164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 4951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:45,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 1487 Invalid, 5164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 4951 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 17:54:45,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-06 17:54:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 122. [2021-12-06 17:54:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 83 states have internal predecessors, (85), 7 states have call successors, (7), 3 states have call predecessors, (7), 32 states have return successors, (55), 35 states have call predecessors, (55), 7 states have call successors, (55) [2021-12-06 17:54:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2021-12-06 17:54:45,863 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 139 [2021-12-06 17:54:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:45,864 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2021-12-06 17:54:45,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 118 states have (on average 1.38135593220339) internal successors, (163), 68 states have internal predecessors, (163), 23 states have call successors, (23), 1 states have call predecessors, (23), 37 states have return successors, (55), 54 states have call predecessors, (55), 23 states have call successors, (55) [2021-12-06 17:54:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2021-12-06 17:54:45,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 17:54:45,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:45,865 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:45,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 17:54:46,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 17:54:46,065 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:46,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:46,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1573249948, now seen corresponding path program 35 times [2021-12-06 17:54:46,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:46,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473239809] [2021-12-06 17:54:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:46,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:54:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:54:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:47,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:47,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:47,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:47,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:47,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:54:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 68 proven. 601 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2021-12-06 17:54:47,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:47,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473239809] [2021-12-06 17:54:47,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473239809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:47,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646515728] [2021-12-06 17:54:47,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:54:47,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:47,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:47,457 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:47,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 17:54:47,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-06 17:54:47,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:47,721 WARN L261 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 241 conjunts are in the unsatisfiable core [2021-12-06 17:54:47,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 33 proven. 565 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2021-12-06 17:54:49,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 60 proven. 1003 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 17:54:59,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646515728] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:59,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:59,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 42, 63] total 128 [2021-12-06 17:54:59,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830218154] [2021-12-06 17:54:59,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:59,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-12-06 17:54:59,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:59,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-12-06 17:54:59,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=15788, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 17:54:59,362 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand has 128 states, 124 states have (on average 1.403225806451613) internal successors, (174), 71 states have internal predecessors, (174), 24 states have call successors, (24), 1 states have call predecessors, (24), 39 states have return successors, (58), 57 states have call predecessors, (58), 24 states have call successors, (58) [2021-12-06 17:55:02,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:02,981 INFO L93 Difference]: Finished difference Result 146 states and 180 transitions. [2021-12-06 17:55:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 17:55:02,982 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 124 states have (on average 1.403225806451613) internal successors, (174), 71 states have internal predecessors, (174), 24 states have call successors, (24), 1 states have call predecessors, (24), 39 states have return successors, (58), 57 states have call predecessors, (58), 24 states have call successors, (58) Word has length 146 [2021-12-06 17:55:02,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:02,983 INFO L225 Difference]: With dead ends: 146 [2021-12-06 17:55:02,983 INFO L226 Difference]: Without dead ends: 139 [2021-12-06 17:55:02,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 230 SyntacticMatches, 22 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7252 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1760, Invalid=27652, Unknown=0, NotChecked=0, Total=29412 [2021-12-06 17:55:02,984 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 274 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 4929 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 5443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 4929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:02,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 1521 Invalid, 5443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 4929 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 17:55:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-06 17:55:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 128. [2021-12-06 17:55:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 87 states have internal predecessors, (89), 7 states have call successors, (7), 3 states have call predecessors, (7), 34 states have return successors, (58), 37 states have call predecessors, (58), 7 states have call successors, (58) [2021-12-06 17:55:02,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 154 transitions. [2021-12-06 17:55:02,992 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 154 transitions. Word has length 146 [2021-12-06 17:55:02,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:02,992 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 154 transitions. [2021-12-06 17:55:02,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 124 states have (on average 1.403225806451613) internal successors, (174), 71 states have internal predecessors, (174), 24 states have call successors, (24), 1 states have call predecessors, (24), 39 states have return successors, (58), 57 states have call predecessors, (58), 24 states have call successors, (58) [2021-12-06 17:55:02,992 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 154 transitions. [2021-12-06 17:55:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-06 17:55:02,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:02,993 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:03,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 17:55:03,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 17:55:03,194 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:03,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1925514456, now seen corresponding path program 36 times [2021-12-06 17:55:03,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:03,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437980274] [2021-12-06 17:55:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:03,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:03,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:55:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:03,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:03,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:03,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:55:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:03,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:03,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:03,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:03,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:03,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:03,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:03,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:03,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:03,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:04,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:04,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:04,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:04,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:04,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:04,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:04,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:04,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 72 proven. 663 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2021-12-06 17:55:04,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:04,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437980274] [2021-12-06 17:55:04,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437980274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:04,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021645655] [2021-12-06 17:55:04,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:55:04,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:04,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:04,702 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:04,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 17:55:04,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-06 17:55:04,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:04,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 253 conjunts are in the unsatisfiable core [2021-12-06 17:55:04,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 34 proven. 625 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2021-12-06 17:55:07,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 62 proven. 1116 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-12-06 17:55:15,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021645655] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:15,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:15,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 43, 65] total 132 [2021-12-06 17:55:15,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008457780] [2021-12-06 17:55:15,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:15,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-12-06 17:55:15,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:15,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-12-06 17:55:15,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=16815, Unknown=0, NotChecked=0, Total=17292 [2021-12-06 17:55:15,543 INFO L87 Difference]: Start difference. First operand 128 states and 154 transitions. Second operand has 132 states, 128 states have (on average 1.390625) internal successors, (178), 72 states have internal predecessors, (178), 25 states have call successors, (25), 1 states have call predecessors, (25), 41 states have return successors, (61), 60 states have call predecessors, (61), 25 states have call successors, (61) [2021-12-06 17:55:19,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:19,394 INFO L93 Difference]: Finished difference Result 152 states and 187 transitions. [2021-12-06 17:55:19,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 17:55:19,394 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 128 states have (on average 1.390625) internal successors, (178), 72 states have internal predecessors, (178), 25 states have call successors, (25), 1 states have call predecessors, (25), 41 states have return successors, (61), 60 states have call predecessors, (61), 25 states have call successors, (61) Word has length 153 [2021-12-06 17:55:19,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:19,395 INFO L225 Difference]: With dead ends: 152 [2021-12-06 17:55:19,395 INFO L226 Difference]: Without dead ends: 145 [2021-12-06 17:55:19,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 262 SyntacticMatches, 4 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6703 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1795, Invalid=29711, Unknown=0, NotChecked=0, Total=31506 [2021-12-06 17:55:19,397 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 251 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 5414 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 5893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 5414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:19,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1667 Invalid, 5893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 5414 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 17:55:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-06 17:55:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 134. [2021-12-06 17:55:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 91 states have internal predecessors, (93), 7 states have call successors, (7), 3 states have call predecessors, (7), 36 states have return successors, (61), 39 states have call predecessors, (61), 7 states have call successors, (61) [2021-12-06 17:55:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 161 transitions. [2021-12-06 17:55:19,404 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 161 transitions. Word has length 153 [2021-12-06 17:55:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:19,405 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 161 transitions. [2021-12-06 17:55:19,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 128 states have (on average 1.390625) internal successors, (178), 72 states have internal predecessors, (178), 25 states have call successors, (25), 1 states have call predecessors, (25), 41 states have return successors, (61), 60 states have call predecessors, (61), 25 states have call successors, (61) [2021-12-06 17:55:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 161 transitions. [2021-12-06 17:55:19,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-06 17:55:19,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:19,406 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:19,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-06 17:55:19,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 17:55:19,608 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:19,609 INFO L85 PathProgramCache]: Analyzing trace with hash -831206420, now seen corresponding path program 37 times [2021-12-06 17:55:19,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:19,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078706206] [2021-12-06 17:55:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:19,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:19,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:55:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:19,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:19,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:19,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:55:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:19,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:19,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:20,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:20,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:20,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:20,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:20,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:20,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:20,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:20,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:20,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:20,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:20,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:20,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:20,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:21,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:21,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:21,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 76 proven. 728 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2021-12-06 17:55:21,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078706206] [2021-12-06 17:55:21,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078706206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657932266] [2021-12-06 17:55:21,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:55:21,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:21,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:21,343 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:21,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 17:55:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:21,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 265 conjunts are in the unsatisfiable core [2021-12-06 17:55:21,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 18 proven. 706 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2021-12-06 17:55:24,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 65 proven. 1235 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-12-06 17:55:35,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657932266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:35,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:35,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 46, 69] total 140 [2021-12-06 17:55:35,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510811285] [2021-12-06 17:55:35,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:35,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2021-12-06 17:55:35,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:35,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-12-06 17:55:35,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=18948, Unknown=0, NotChecked=0, Total=19460 [2021-12-06 17:55:35,586 INFO L87 Difference]: Start difference. First operand 134 states and 161 transitions. Second operand has 140 states, 136 states have (on average 1.375) internal successors, (187), 77 states have internal predecessors, (187), 26 states have call successors, (26), 1 states have call predecessors, (26), 43 states have return successors, (64), 63 states have call predecessors, (64), 26 states have call successors, (64) [2021-12-06 17:55:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:40,789 INFO L93 Difference]: Finished difference Result 158 states and 194 transitions. [2021-12-06 17:55:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 17:55:40,790 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 136 states have (on average 1.375) internal successors, (187), 77 states have internal predecessors, (187), 26 states have call successors, (26), 1 states have call predecessors, (26), 43 states have return successors, (64), 63 states have call predecessors, (64), 26 states have call successors, (64) Word has length 160 [2021-12-06 17:55:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:40,791 INFO L225 Difference]: With dead ends: 158 [2021-12-06 17:55:40,791 INFO L226 Difference]: Without dead ends: 151 [2021-12-06 17:55:40,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 272 SyntacticMatches, 4 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7588 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=2020, Invalid=33136, Unknown=0, NotChecked=0, Total=35156 [2021-12-06 17:55:40,793 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 7179 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2236 SdHoareTripleChecker+Invalid, 7427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 7179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:40,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 2236 Invalid, 7427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 7179 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 17:55:40,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-06 17:55:40,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 140. [2021-12-06 17:55:40,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 95 states have internal predecessors, (97), 7 states have call successors, (7), 3 states have call predecessors, (7), 38 states have return successors, (64), 41 states have call predecessors, (64), 7 states have call successors, (64) [2021-12-06 17:55:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 168 transitions. [2021-12-06 17:55:40,800 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 168 transitions. Word has length 160 [2021-12-06 17:55:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:40,801 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 168 transitions. [2021-12-06 17:55:40,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 136 states have (on average 1.375) internal successors, (187), 77 states have internal predecessors, (187), 26 states have call successors, (26), 1 states have call predecessors, (26), 43 states have return successors, (64), 63 states have call predecessors, (64), 26 states have call successors, (64) [2021-12-06 17:55:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 168 transitions. [2021-12-06 17:55:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-06 17:55:40,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:40,802 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:40,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 17:55:41,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 17:55:41,003 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:41,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1006564958, now seen corresponding path program 38 times [2021-12-06 17:55:41,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:41,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808615316] [2021-12-06 17:55:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:41,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:55:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 17:55:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:42,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:42,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:42,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:42,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:42,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:42,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:42,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:42,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:42,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:42,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:55:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 84 proven. 867 refuted. 0 times theorem prover too weak. 891 trivial. 0 not checked. [2021-12-06 17:55:43,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:43,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808615316] [2021-12-06 17:55:43,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808615316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:43,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857368939] [2021-12-06 17:55:43,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:55:43,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:43,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:43,012 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:43,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 17:55:43,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:55:43,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:43,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 289 conjunts are in the unsatisfiable core [2021-12-06 17:55:43,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 19 proven. 841 refuted. 0 times theorem prover too weak. 982 trivial. 0 not checked. [2021-12-06 17:55:46,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:56:14,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857368939] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:56:14,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:56:14,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 48] total 100 [2021-12-06 17:56:14,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280995874] [2021-12-06 17:56:14,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:56:14,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-06 17:56:14,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:56:14,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-06 17:56:14,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=22088, Unknown=6, NotChecked=0, Total=22650 [2021-12-06 17:56:14,864 INFO L87 Difference]: Start difference. First operand 140 states and 168 transitions. Second operand has 100 states, 97 states have (on average 1.1030927835051547) internal successors, (107), 55 states have internal predecessors, (107), 5 states have call successors, (5), 1 states have call predecessors, (5), 44 states have return successors, (45), 45 states have call predecessors, (45), 5 states have call successors, (45) [2021-12-06 17:56:19,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:56:19,113 INFO L93 Difference]: Finished difference Result 156 states and 189 transitions. [2021-12-06 17:56:19,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 17:56:19,113 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 97 states have (on average 1.1030927835051547) internal successors, (107), 55 states have internal predecessors, (107), 5 states have call successors, (5), 1 states have call predecessors, (5), 44 states have return successors, (45), 45 states have call predecessors, (45), 5 states have call successors, (45) Word has length 174 [2021-12-06 17:56:19,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:56:19,114 INFO L225 Difference]: With dead ends: 156 [2021-12-06 17:56:19,114 INFO L226 Difference]: Without dead ends: 152 [2021-12-06 17:56:19,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 281 SyntacticMatches, 3 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7720 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=1925, Invalid=34741, Unknown=6, NotChecked=0, Total=36672 [2021-12-06 17:56:19,116 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 1784 mSDsCounter, 0 mSdLazyCounter, 4935 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 4954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 4935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:56:19,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1816 Invalid, 4954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 4935 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 17:56:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-06 17:56:19,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2021-12-06 17:56:19,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 98 states have internal predecessors, (100), 8 states have call successors, (8), 3 states have call predecessors, (8), 39 states have return successors, (70), 43 states have call predecessors, (70), 8 states have call successors, (70) [2021-12-06 17:56:19,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 178 transitions. [2021-12-06 17:56:19,125 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 178 transitions. Word has length 174 [2021-12-06 17:56:19,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:56:19,125 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 178 transitions. [2021-12-06 17:56:19,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 97 states have (on average 1.1030927835051547) internal successors, (107), 55 states have internal predecessors, (107), 5 states have call successors, (5), 1 states have call predecessors, (5), 44 states have return successors, (45), 45 states have call predecessors, (45), 5 states have call successors, (45) [2021-12-06 17:56:19,125 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 178 transitions. [2021-12-06 17:56:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-06 17:56:19,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:56:19,126 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 23, 23, 23, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:56:19,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 17:56:19,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-06 17:56:19,328 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:56:19,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:56:19,329 INFO L85 PathProgramCache]: Analyzing trace with hash -549884440, now seen corresponding path program 39 times [2021-12-06 17:56:19,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:56:19,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113133280] [2021-12-06 17:56:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:56:19,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:56:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:19,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:56:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:19,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:19,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:19,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:19,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:19,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 17:56:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:19,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:19,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:19,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:19,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:20,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:20,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:20,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:20,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:20,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:20,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:20,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:20,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:20,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:20,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:20,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:20,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:21,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:21,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:21,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 88 proven. 941 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2021-12-06 17:56:21,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:56:21,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113133280] [2021-12-06 17:56:21,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113133280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:56:21,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83593186] [2021-12-06 17:56:21,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:56:21,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:21,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:56:21,383 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:56:21,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 17:56:21,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-12-06 17:56:21,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:56:21,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 300 conjunts are in the unsatisfiable core [2021-12-06 17:56:21,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:56:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 48 proven. 931 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-12-06 17:56:25,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:56:55,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83593186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:56:55,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:56:55,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 52] total 104 [2021-12-06 17:56:55,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581143298] [2021-12-06 17:56:55,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:56:55,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-06 17:56:55,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:56:55,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-06 17:56:55,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=23288, Unknown=6, NotChecked=0, Total=23870 [2021-12-06 17:56:55,301 INFO L87 Difference]: Start difference. First operand 145 states and 178 transitions. Second operand has 104 states, 101 states have (on average 1.118811881188119) internal successors, (113), 58 states have internal predecessors, (113), 5 states have call successors, (5), 1 states have call predecessors, (5), 46 states have return successors, (47), 46 states have call predecessors, (47), 5 states have call successors, (47) [2021-12-06 17:56:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:56:59,610 INFO L93 Difference]: Finished difference Result 158 states and 192 transitions. [2021-12-06 17:56:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 17:56:59,610 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 101 states have (on average 1.118811881188119) internal successors, (113), 58 states have internal predecessors, (113), 5 states have call successors, (5), 1 states have call predecessors, (5), 46 states have return successors, (47), 46 states have call predecessors, (47), 5 states have call successors, (47) Word has length 181 [2021-12-06 17:56:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:56:59,611 INFO L225 Difference]: With dead ends: 158 [2021-12-06 17:56:59,611 INFO L226 Difference]: Without dead ends: 154 [2021-12-06 17:56:59,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 267 SyntacticMatches, 24 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9064 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=1987, Invalid=36227, Unknown=6, NotChecked=0, Total=38220 [2021-12-06 17:56:59,614 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 122 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 4886 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1922 SdHoareTripleChecker+Invalid, 5069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 4886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:56:59,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1922 Invalid, 5069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 4886 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 17:56:59,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-06 17:56:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 145. [2021-12-06 17:56:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 98 states have internal predecessors, (100), 8 states have call successors, (8), 3 states have call predecessors, (8), 39 states have return successors, (70), 43 states have call predecessors, (70), 8 states have call successors, (70) [2021-12-06 17:56:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 178 transitions. [2021-12-06 17:56:59,627 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 178 transitions. Word has length 181 [2021-12-06 17:56:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:56:59,627 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 178 transitions. [2021-12-06 17:56:59,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 101 states have (on average 1.118811881188119) internal successors, (113), 58 states have internal predecessors, (113), 5 states have call successors, (5), 1 states have call predecessors, (5), 46 states have return successors, (47), 46 states have call predecessors, (47), 5 states have call successors, (47) [2021-12-06 17:56:59,627 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 178 transitions. [2021-12-06 17:56:59,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-06 17:56:59,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:56:59,628 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:56:59,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 17:56:59,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:59,830 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:56:59,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:56:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash 883853016, now seen corresponding path program 40 times [2021-12-06 17:56:59,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:56:59,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907427905] [2021-12-06 17:56:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:56:59,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:56:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:59,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:56:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:59,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:56:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:00,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:00,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:57:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:00,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:00,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:00,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:00,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:00,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:00,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:00,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:00,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:00,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:00,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:00,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:00,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:01,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:01,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:01,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:01,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:01,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:01,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:01,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 80 proven. 796 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2021-12-06 17:57:01,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:01,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907427905] [2021-12-06 17:57:01,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907427905] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:57:01,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280104011] [2021-12-06 17:57:01,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:57:01,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:57:01,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:57:01,643 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:57:01,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 17:57:01,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:57:01,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:57:01,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 277 conjunts are in the unsatisfiable core [2021-12-06 17:57:01,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:57:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 19 proven. 773 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2021-12-06 17:57:04,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:57:20,148 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_942_81| Int) (v_mult_~n_BEFORE_CALL_942 Int) (|aux_mod_v_mult_#in~n_BEFORE_CALL_942_81| Int)) (let ((.cse0 (div (+ (- 1) (* |aux_div_v_mult_#in~n_BEFORE_CALL_942_81| (- 38)) (* |c_mult_#res| 2) (* v_mult_~n_BEFORE_CALL_942 2) (* |aux_mod_v_mult_#in~n_BEFORE_CALL_942_81| (- 2))) (- 19))) (.cse1 (div (+ (* |aux_div_v_mult_#in~n_BEFORE_CALL_942_81| 38) (- 1) (* v_mult_~n_BEFORE_CALL_942 (- 2)) (* |aux_mod_v_mult_#in~n_BEFORE_CALL_942_81| 2) (* |c_mult_#res| (- 2))) 19))) (or (<= 19 |aux_mod_v_mult_#in~n_BEFORE_CALL_942_81|) (< |aux_mod_v_mult_#in~n_BEFORE_CALL_942_81| 0) (<= .cse0 (+ |aux_div_v_mult_#in~n_BEFORE_CALL_942_81| 1)) (< (+ .cse1 1) (div (+ (* |aux_mod_v_mult_#in~n_BEFORE_CALL_942_81| (- 1)) |c_mult_#res| (* |aux_div_v_mult_#in~n_BEFORE_CALL_942_81| (- 19))) (- 19))) (< (+ (div (+ |aux_mod_v_mult_#in~n_BEFORE_CALL_942_81| (* |aux_div_v_mult_#in~n_BEFORE_CALL_942_81| 19) (* |c_mult_#res| (- 1))) 19) 1) .cse0) (< .cse0 (+ 2 .cse1))))) (<= 0 |c_mult_#in~m|) (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_942_115| Int) (v_mult_~n_BEFORE_CALL_942 Int) (|aux_mod_v_mult_#in~n_BEFORE_CALL_942_115| Int)) (let ((.cse4 (div (+ (- 1) (* v_mult_~n_BEFORE_CALL_942 (- 2)) (* |aux_div_v_mult_#in~n_BEFORE_CALL_942_115| 38) (* |aux_mod_v_mult_#in~n_BEFORE_CALL_942_115| (- 2)) (* |c_mult_#res| (- 2))) 19))) (let ((.cse3 (+ .cse4 1)) (.cse2 (div (+ (- 1) (* |c_mult_#res| 2) (* |aux_div_v_mult_#in~n_BEFORE_CALL_942_115| (- 38)) (* v_mult_~n_BEFORE_CALL_942 2) (* |aux_mod_v_mult_#in~n_BEFORE_CALL_942_115| 2)) (- 19)))) (or (<= 19 |aux_mod_v_mult_#in~n_BEFORE_CALL_942_115|) (< |aux_mod_v_mult_#in~n_BEFORE_CALL_942_115| 0) (< (+ (div (+ (* |aux_mod_v_mult_#in~n_BEFORE_CALL_942_115| (- 1)) (* |aux_div_v_mult_#in~n_BEFORE_CALL_942_115| 19) (* |c_mult_#res| (- 1))) 19) 1) .cse2) (<= |aux_div_v_mult_#in~n_BEFORE_CALL_942_115| .cse3) (< .cse3 (div (+ |c_mult_#res| |aux_mod_v_mult_#in~n_BEFORE_CALL_942_115| (* |aux_div_v_mult_#in~n_BEFORE_CALL_942_115| (- 19))) (- 19))) (< .cse2 (+ 2 .cse4)))))) (<= |c_mult_#in~m| 0)) is different from false [2021-12-06 17:57:22,552 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_942_115_137| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_942_115| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_115_137_147| Int) (v_mult_~n_BEFORE_CALL_942 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_115_137_147| Int)) (let ((.cse1 (div (+ (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_115_137_147| (- 2)) (* v_mult_~n_BEFORE_CALL_942 (- 2)) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_115_137_147| 38)) 19))) (let ((.cse0 (div (+ (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_115_137_147| 2) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_115_137_147| (- 38)) (* v_mult_~n_BEFORE_CALL_942 2)) (- 19))) (.cse2 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_115_137_147| (* 19 |aux_div_v_mult_#in~n_BEFORE_CALL_942_115|))) (.cse3 (* 19 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_115_137_147|)) (.cse4 (+ .cse1 1))) (or (< .cse0 (+ .cse1 2)) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_115_137_147| 0) (< (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_942_115_137| 1) .cse0) (< .cse2 (+ |c_mult_#res| .cse3)) (<= (+ 19 |c_mult_#res| .cse3) .cse2) (< .cse4 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_115_137_147|) (< .cse3 (+ (* 19 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_942_115_137|) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_115_137_147|)) (<= |aux_div_v_mult_#in~n_BEFORE_CALL_942_115| .cse4))))) (<= 0 |c_mult_#in~m|) (forall ((|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_81_133_137| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_942_81| Int) (v_mult_~n_BEFORE_CALL_942 Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_942_81_133| Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_81_133_137| Int)) (let ((.cse9 (* 19 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_81_133_137|))) (let ((.cse5 (div (+ (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_81_133_137| (- 2)) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_81_133_137| (- 38)) (* v_mult_~n_BEFORE_CALL_942 2)) (- 19))) (.cse8 (div (+ (- 1) (* v_mult_~n_BEFORE_CALL_942 (- 2)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_81_133_137| 2) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_81_133_137| 38)) 19)) (.cse7 (+ .cse9 |c_mult_#res| |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_81_133_137|)) (.cse6 (* 19 |aux_div_v_mult_#in~n_BEFORE_CALL_942_81|))) (or (< (+ |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_81_133_137| 1) .cse5) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_81_133_137| 0) (<= (+ 19 .cse6) .cse7) (<= .cse5 (+ |aux_div_v_mult_#in~n_BEFORE_CALL_942_81| 1)) (< (+ .cse8 1) |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_942_81_133|) (< .cse5 (+ .cse8 2)) (< (* 19 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_942_81_133|) (+ .cse9 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_942_81_133_137|)) (< .cse7 .cse6))))) (<= |c_mult_#in~m| 0)) is different from false [2021-12-06 17:57:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 68 proven. 1318 refuted. 0 times theorem prover too weak. 255 trivial. 44 not checked. [2021-12-06 17:57:22,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280104011] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:57:22,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:57:22,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 48, 74] total 148 [2021-12-06 17:57:22,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299842681] [2021-12-06 17:57:22,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:57:22,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2021-12-06 17:57:22,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:22,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-12-06 17:57:22,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=20638, Unknown=2, NotChecked=578, Total=21756 [2021-12-06 17:57:22,716 INFO L87 Difference]: Start difference. First operand 145 states and 178 transitions. Second operand has 148 states, 143 states have (on average 1.3776223776223777) internal successors, (197), 82 states have internal predecessors, (197), 27 states have call successors, (27), 1 states have call predecessors, (27), 46 states have return successors, (67), 66 states have call predecessors, (67), 27 states have call successors, (67) [2021-12-06 17:57:28,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:28,443 INFO L93 Difference]: Finished difference Result 166 states and 204 transitions. [2021-12-06 17:57:28,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 17:57:28,443 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 143 states have (on average 1.3776223776223777) internal successors, (197), 82 states have internal predecessors, (197), 27 states have call successors, (27), 1 states have call predecessors, (27), 46 states have return successors, (67), 66 states have call predecessors, (67), 27 states have call successors, (67) Word has length 167 [2021-12-06 17:57:28,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:28,444 INFO L225 Difference]: With dead ends: 166 [2021-12-06 17:57:28,444 INFO L226 Difference]: Without dead ends: 159 [2021-12-06 17:57:28,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 283 SyntacticMatches, 4 SemanticMatches, 196 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 8219 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=2160, Invalid=36066, Unknown=2, NotChecked=778, Total=39006 [2021-12-06 17:57:28,446 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 74 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 6527 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 6876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 6527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:28,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 1970 Invalid, 6876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 6527 Invalid, 0 Unknown, 208 Unchecked, 2.6s Time] [2021-12-06 17:57:28,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-06 17:57:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 146. [2021-12-06 17:57:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 98 states have (on average 1.030612244897959) internal successors, (101), 99 states have internal predecessors, (101), 7 states have call successors, (7), 3 states have call predecessors, (7), 40 states have return successors, (67), 43 states have call predecessors, (67), 7 states have call successors, (67) [2021-12-06 17:57:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2021-12-06 17:57:28,457 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 167 [2021-12-06 17:57:28,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:28,458 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2021-12-06 17:57:28,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 143 states have (on average 1.3776223776223777) internal successors, (197), 82 states have internal predecessors, (197), 27 states have call successors, (27), 1 states have call predecessors, (27), 46 states have return successors, (67), 66 states have call predecessors, (67), 27 states have call successors, (67) [2021-12-06 17:57:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2021-12-06 17:57:28,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-06 17:57:28,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:28,459 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:57:28,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-06 17:57:28,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:57:28,661 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash -464155588, now seen corresponding path program 41 times [2021-12-06 17:57:28,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:28,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242407379] [2021-12-06 17:57:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:28,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:28,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:57:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:28,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:28,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:28,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:57:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:28,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:29,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:29,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:29,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:29,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:29,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:29,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:29,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:29,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:29,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:29,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:29,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:29,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:30,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:30,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:30,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:30,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:30,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:30,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:30,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 84 proven. 867 refuted. 0 times theorem prover too weak. 891 trivial. 0 not checked. [2021-12-06 17:57:30,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:30,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242407379] [2021-12-06 17:57:30,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242407379] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:57:30,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178321287] [2021-12-06 17:57:30,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:57:30,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:57:30,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:57:30,662 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:57:30,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 17:57:31,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-12-06 17:57:31,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:57:31,025 WARN L261 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 289 conjunts are in the unsatisfiable core [2021-12-06 17:57:31,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:57:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 41 proven. 823 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2021-12-06 17:57:33,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:57:50,393 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_139| Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_139| Int) (v_mult_~n_BEFORE_CALL_986 Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_986_93| Int)) (let ((.cse0 (div (+ (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_139| 2) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_139| 40) (* v_mult_~n_BEFORE_CALL_986 (- 2)) (* |c_mult_#res| (- 2))) 20)) (.cse1 (+ (* 20 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_139|) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_139|)) (.cse2 (div (+ (- 1) (* |c_mult_#res| 2) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_139| (- 2)) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_139| (- 40)) (* v_mult_~n_BEFORE_CALL_986 2)) (- 20)))) (or (< (+ .cse0 1) |aux_div_v_mult_#in~n_BEFORE_CALL_986_93|) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_139| 0) (< .cse1 (+ |c_mult_#res| (* 20 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113|))) (< .cse2 (+ 2 .cse0)) (<= 20 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_139|) (<= .cse2 (+ |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_139| 1)) (< (+ (* 20 |aux_div_v_mult_#in~n_BEFORE_CALL_986_93|) |c_mult_#res|) .cse1) (< (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113| 1) .cse2)))) (forall ((v_mult_~n_BEFORE_CALL_986 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_167| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_167| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_986_93| Int)) (let ((.cse5 (div (+ (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_167| 40) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_167| (- 2)) (* v_mult_~n_BEFORE_CALL_986 (- 2)) (* |c_mult_#res| (- 2))) 20))) (let ((.cse3 (+ .cse5 1)) (.cse6 (* 20 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_167|)) (.cse4 (div (+ (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_167| (- 40)) (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_167| 2) (* |c_mult_#res| 2) (* v_mult_~n_BEFORE_CALL_986 2)) (- 20)))) (or (< .cse3 |aux_div_v_mult_#in~n_BEFORE_CALL_986_93|) (< .cse4 (+ 2 .cse5)) (< .cse6 (+ |c_mult_#res| |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_167| (* 20 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113|))) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_167| 0) (<= |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_167| .cse3) (< (+ (* 20 |aux_div_v_mult_#in~n_BEFORE_CALL_986_93|) |c_mult_#res| |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_167|) .cse6) (<= 20 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113_167|) (< (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_986_93_113| 1) .cse4))))) (= |c_mult_#in~m| 0)) is different from false [2021-12-06 17:57:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 72 proven. 1447 refuted. 0 times theorem prover too weak. 277 trivial. 46 not checked. [2021-12-06 17:57:50,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178321287] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:57:50,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:57:50,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 50, 76] total 153 [2021-12-06 17:57:50,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137274521] [2021-12-06 17:57:50,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:57:50,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2021-12-06 17:57:50,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:50,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2021-12-06 17:57:50,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=558, Invalid=22397, Unknown=1, NotChecked=300, Total=23256 [2021-12-06 17:57:50,911 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand has 153 states, 149 states have (on average 1.389261744966443) internal successors, (207), 84 states have internal predecessors, (207), 28 states have call successors, (28), 1 states have call predecessors, (28), 48 states have return successors, (70), 69 states have call predecessors, (70), 28 states have call successors, (70) [2021-12-06 17:57:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:56,388 INFO L93 Difference]: Finished difference Result 170 states and 208 transitions. [2021-12-06 17:57:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 17:57:56,388 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 149 states have (on average 1.389261744966443) internal successors, (207), 84 states have internal predecessors, (207), 28 states have call successors, (28), 1 states have call predecessors, (28), 48 states have return successors, (70), 69 states have call predecessors, (70), 28 states have call successors, (70) Word has length 174 [2021-12-06 17:57:56,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:56,389 INFO L225 Difference]: With dead ends: 170 [2021-12-06 17:57:56,389 INFO L226 Difference]: Without dead ends: 163 [2021-12-06 17:57:56,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 274 SyntacticMatches, 25 SemanticMatches, 203 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10198 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=2298, Invalid=39117, Unknown=1, NotChecked=404, Total=41820 [2021-12-06 17:57:56,395 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 53 mSDsluCounter, 2419 mSDsCounter, 0 mSdLazyCounter, 7693 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 2454 SdHoareTripleChecker+Invalid, 7901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 7693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:56,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 2454 Invalid, 7901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 7693 Invalid, 0 Unknown, 111 Unchecked, 2.8s Time] [2021-12-06 17:57:56,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-06 17:57:56,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 152. [2021-12-06 17:57:56,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 103 states have internal predecessors, (105), 7 states have call successors, (7), 3 states have call predecessors, (7), 42 states have return successors, (70), 45 states have call predecessors, (70), 7 states have call successors, (70) [2021-12-06 17:57:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 182 transitions. [2021-12-06 17:57:56,407 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 182 transitions. Word has length 174 [2021-12-06 17:57:56,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:56,408 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 182 transitions. [2021-12-06 17:57:56,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 149 states have (on average 1.389261744966443) internal successors, (207), 84 states have internal predecessors, (207), 28 states have call successors, (28), 1 states have call predecessors, (28), 48 states have return successors, (70), 69 states have call predecessors, (70), 28 states have call successors, (70) [2021-12-06 17:57:56,408 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 182 transitions. [2021-12-06 17:57:56,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-06 17:57:56,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:56,409 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 23, 23, 23, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:57:56,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-06 17:57:56,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:57:56,611 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:56,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:56,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1382201992, now seen corresponding path program 42 times [2021-12-06 17:57:56,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:56,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303578294] [2021-12-06 17:57:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:56,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:56,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:57:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:56,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:56,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:56,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 17:57:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:56,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:56,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:57,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:57,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:57,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:57,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:57,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:57,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:57,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:57,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:57,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:57,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:57,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:57,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:58,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:58,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:58,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:58,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:58,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:58,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:58,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:57:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 88 proven. 941 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2021-12-06 17:57:58,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:58,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303578294] [2021-12-06 17:57:58,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303578294] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:57:58,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505756604] [2021-12-06 17:57:58,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:57:58,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:57:58,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:57:58,790 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:57:58,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4930c1dd-4be6-45b7-aa66-4a43dc153197/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 17:57:59,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-12-06 17:57:59,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:57:59,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 301 conjunts are in the unsatisfiable core [2021-12-06 17:57:59,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 21 proven. 916 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2021-12-06 17:58:02,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 74 proven. 1628 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-12-06 17:58:17,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505756604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:17,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:58:17,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 52, 78] total 158 [2021-12-06 17:58:17,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916194122] [2021-12-06 17:58:17,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:17,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2021-12-06 17:58:17,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:17,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-12-06 17:58:17,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=24228, Unknown=0, NotChecked=0, Total=24806 [2021-12-06 17:58:17,024 INFO L87 Difference]: Start difference. First operand 152 states and 182 transitions. Second operand has 158 states, 154 states have (on average 1.37012987012987) internal successors, (211), 86 states have internal predecessors, (211), 29 states have call successors, (29), 1 states have call predecessors, (29), 49 states have return successors, (73), 72 states have call predecessors, (73), 29 states have call successors, (73)