./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/rec_counter1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/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_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-numeric/rec_counter1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash de5b7f1cccf5c7fe435559014125bbfd73538586d5303d45f8d606cb31a4b74b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:13:09,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:13:09,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:13:09,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:13:09,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:13:09,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:13:09,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:13:09,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:13:09,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:13:09,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:13:09,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:13:09,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:13:09,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:13:09,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:13:09,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:13:09,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:13:09,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:13:09,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:13:09,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:13:09,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:13:09,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:13:09,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:13:09,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:13:09,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:13:09,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:13:09,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:13:09,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:13:09,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:13:09,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:13:09,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:13:09,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:13:09,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:13:09,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:13:09,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:13:09,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:13:09,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:13:09,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:13:09,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:13:09,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:13:09,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:13:09,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:13:09,565 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-06 20:13:09,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:13:09,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:13:09,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:13:09,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:13:09,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:13:09,584 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:13:09,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:13:09,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:13:09,584 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:13:09,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:13:09,585 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 20:13:09,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:13:09,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:13:09,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:13:09,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:13:09,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:13:09,585 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-06 20:13:09,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:13:09,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:13:09,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:13:09,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:13:09,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:13:09,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:13:09,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:13:09,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:13:09,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:13:09,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:13:09,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:13:09,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:13:09,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:13:09,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:13:09,587 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_b86cf937-7ef1-4b5b-967e-1f978a2d4514/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de5b7f1cccf5c7fe435559014125bbfd73538586d5303d45f8d606cb31a4b74b [2021-12-06 20:13:09,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:13:09,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:13:09,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:13:09,783 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:13:09,784 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:13:09,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/termination-numeric/rec_counter1.c [2021-12-06 20:13:09,827 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/data/f87293262/fc23e9c7a6664cc7b225cedf4d60232c/FLAGfc326b2c2 [2021-12-06 20:13:10,231 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:13:10,232 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/sv-benchmarks/c/termination-numeric/rec_counter1.c [2021-12-06 20:13:10,236 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/data/f87293262/fc23e9c7a6664cc7b225cedf4d60232c/FLAGfc326b2c2 [2021-12-06 20:13:10,245 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/data/f87293262/fc23e9c7a6664cc7b225cedf4d60232c [2021-12-06 20:13:10,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:13:10,247 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:13:10,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:13:10,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:13:10,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:13:10,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:13:10" (1/1) ... [2021-12-06 20:13:10,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@355ab704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:13:10, skipping insertion in model container [2021-12-06 20:13:10,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:13:10" (1/1) ... [2021-12-06 20:13:10,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:13:10,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:13:10,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:13:10,377 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:13:10,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:13:10,394 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:13:10,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:13:10 WrapperNode [2021-12-06 20:13:10,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:13:10,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:13:10,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:13:10,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:13:10,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:13:10" (1/1) ... [2021-12-06 20:13:10,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:13:10" (1/1) ... [2021-12-06 20:13:10,414 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 12 [2021-12-06 20:13:10,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:13:10,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:13:10,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:13:10,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:13:10,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:13:10" (1/1) ... [2021-12-06 20:13:10,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:13:10" (1/1) ... [2021-12-06 20:13:10,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:13:10" (1/1) ... [2021-12-06 20:13:10,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:13:10" (1/1) ... [2021-12-06 20:13:10,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:13:10" (1/1) ... [2021-12-06 20:13:10,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:13:10" (1/1) ... [2021-12-06 20:13:10,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:13:10" (1/1) ... [2021-12-06 20:13:10,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:13:10,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:13:10,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:13:10,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:13:10,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:13:10" (1/1) ... [2021-12-06 20:13:10,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:13:10,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:10,456 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:13:10,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:13:10,486 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2021-12-06 20:13:10,486 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2021-12-06 20:13:10,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:13:10,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:13:10,526 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:13:10,528 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:13:10,600 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:13:10,606 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:13:10,606 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 20:13:10,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:13:10 BoogieIcfgContainer [2021-12-06 20:13:10,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:13:10,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:13:10,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:13:10,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:13:10,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:13:10" (1/3) ... [2021-12-06 20:13:10,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1809587a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:13:10, skipping insertion in model container [2021-12-06 20:13:10,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:13:10" (2/3) ... [2021-12-06 20:13:10,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1809587a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:13:10, skipping insertion in model container [2021-12-06 20:13:10,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:13:10" (3/3) ... [2021-12-06 20:13:10,614 INFO L111 eAbstractionObserver]: Analyzing ICFG rec_counter1.c [2021-12-06 20:13:10,618 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:13:10,618 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-12-06 20:13:10,657 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:13:10,662 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=FINITE_AUTOMATA, 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 20:13:10,663 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-12-06 20:13:10,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.588235294117647) internal successors, (27), 23 states have internal predecessors, (27), 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 20:13:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 20:13:10,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:10,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:10,680 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:10,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:10,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1088965814, now seen corresponding path program 1 times [2021-12-06 20:13:10,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:10,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646497695] [2021-12-06 20:13:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:10,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:10,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:10,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646497695] [2021-12-06 20:13:10,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646497695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:13:10,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:13:10,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:13:10,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599819862] [2021-12-06 20:13:10,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:13:10,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:13:10,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:13:10,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:13:10,836 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.588235294117647) internal successors, (27), 23 states have internal predecessors, (27), 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) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:10,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:10,886 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-12-06 20:13:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:13:10,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 20:13:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:10,893 INFO L225 Difference]: With dead ends: 43 [2021-12-06 20:13:10,893 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 20:13:10,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 20:13:10,898 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:10,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 44 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:13:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 20:13:10,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-06 20:13:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:13:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-06 20:13:10,927 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 7 [2021-12-06 20:13:10,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:10,927 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-06 20:13:10,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-06 20:13:10,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 20:13:10,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:10,928 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:10,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:13:10,928 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:10,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:10,929 INFO L85 PathProgramCache]: Analyzing trace with hash -601798096, now seen corresponding path program 1 times [2021-12-06 20:13:10,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:10,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108406586] [2021-12-06 20:13:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:10,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:10,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:10,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108406586] [2021-12-06 20:13:10,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108406586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:13:10,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:13:10,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:13:10,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43327482] [2021-12-06 20:13:10,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:13:10,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:13:10,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:10,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:13:10,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:13:10,960 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:10,988 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-12-06 20:13:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:13:10,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 20:13:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:10,990 INFO L225 Difference]: With dead ends: 42 [2021-12-06 20:13:10,990 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 20:13:10,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 20:13:10,991 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:10,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 79 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:13:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 20:13:10,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-12-06 20:13:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:13:10,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-12-06 20:13:10,998 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 8 [2021-12-06 20:13:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:10,999 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-12-06 20:13:10,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-12-06 20:13:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 20:13:11,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:11,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:11,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:13:11,001 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:11,001 INFO L85 PathProgramCache]: Analyzing trace with hash 758423009, now seen corresponding path program 1 times [2021-12-06 20:13:11,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:11,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100257469] [2021-12-06 20:13:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:11,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:11,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:11,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100257469] [2021-12-06 20:13:11,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100257469] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:11,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801472816] [2021-12-06 20:13:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:11,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:11,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:11,047 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:11,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:13:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:11,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:13:11,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:11,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:11,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801472816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:11,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:11,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-06 20:13:11,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217138866] [2021-12-06 20:13:11,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:11,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:13:11,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:11,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:13:11,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:13:11,197 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:11,252 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-12-06 20:13:11,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:13:11,253 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 20:13:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:11,254 INFO L225 Difference]: With dead ends: 39 [2021-12-06 20:13:11,254 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 20:13:11,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:13:11,256 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:11,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 72 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:13:11,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 20:13:11,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-12-06 20:13:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:13:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-06 20:13:11,264 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 13 [2021-12-06 20:13:11,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:11,264 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-06 20:13:11,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:11,264 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-06 20:13:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 20:13:11,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:11,265 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:11,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:13:11,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:11,467 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:11,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1647452250, now seen corresponding path program 1 times [2021-12-06 20:13:11,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:11,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167895610] [2021-12-06 20:13:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:11,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:11,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:13:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:13:11,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:11,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167895610] [2021-12-06 20:13:11,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167895610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:13:11,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:13:11,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:13:11,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961356920] [2021-12-06 20:13:11,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:13:11,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:13:11,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:13:11,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:13:11,602 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:13:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:11,635 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-12-06 20:13:11,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:13:11,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-06 20:13:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:11,636 INFO L225 Difference]: With dead ends: 48 [2021-12-06 20:13:11,637 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 20:13:11,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:13:11,638 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:11,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 54 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:13:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 20:13:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-12-06 20:13:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 31 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:13:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-12-06 20:13:11,645 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 16 [2021-12-06 20:13:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:11,646 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-12-06 20:13:11,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:13:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-12-06 20:13:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 20:13:11,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:11,647 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:11,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 20:13:11,647 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:11,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1647452195, now seen corresponding path program 1 times [2021-12-06 20:13:11,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:11,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082104008] [2021-12-06 20:13:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:11,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:11,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:13:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:13:11,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:11,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082104008] [2021-12-06 20:13:11,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082104008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:13:11,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:13:11,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:13:11,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238481358] [2021-12-06 20:13:11,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:13:11,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:13:11,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:11,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:13:11,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:13:11,686 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:13:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:11,699 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2021-12-06 20:13:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:13:11,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-06 20:13:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:11,700 INFO L225 Difference]: With dead ends: 64 [2021-12-06 20:13:11,700 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 20:13:11,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:13:11,702 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:11,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:13:11,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 20:13:11,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-06 20:13:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 20:13:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2021-12-06 20:13:11,708 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 16 [2021-12-06 20:13:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:11,708 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2021-12-06 20:13:11,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:13:11,709 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2021-12-06 20:13:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 20:13:11,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:11,709 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:11,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 20:13:11,710 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:11,711 INFO L85 PathProgramCache]: Analyzing trace with hash 468587862, now seen corresponding path program 1 times [2021-12-06 20:13:11,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:11,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031727712] [2021-12-06 20:13:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:11,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:11,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:13:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:13:11,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:11,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031727712] [2021-12-06 20:13:11,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031727712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:13:11,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:13:11,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:13:11,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021852931] [2021-12-06 20:13:11,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:13:11,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:13:11,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:11,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:13:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:13:11,734 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:13:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:11,740 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-12-06 20:13:11,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:13:11,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-06 20:13:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:11,741 INFO L225 Difference]: With dead ends: 42 [2021-12-06 20:13:11,741 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 20:13:11,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:13:11,742 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:11,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:13:11,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 20:13:11,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-06 20:13:11,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 31 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:13:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-12-06 20:13:11,747 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 17 [2021-12-06 20:13:11,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:11,748 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-12-06 20:13:11,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:13:11,748 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-12-06 20:13:11,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 20:13:11,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:11,749 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:11,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 20:13:11,749 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:11,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:11,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1288772758, now seen corresponding path program 1 times [2021-12-06 20:13:11,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:11,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11694787] [2021-12-06 20:13:11,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:11,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:11,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:13:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:11,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 20:13:11,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:11,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11694787] [2021-12-06 20:13:11,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11694787] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:11,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959501124] [2021-12-06 20:13:11,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:11,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:11,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:11,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:11,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:13:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:11,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:13:11,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 20:13:11,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:13:11,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959501124] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:13:11,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:13:11,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2021-12-06 20:13:11,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367755644] [2021-12-06 20:13:11,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:13:11,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:13:11,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:11,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:13:11,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:13:11,909 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:13:11,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:11,945 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-12-06 20:13:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:13:11,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-12-06 20:13:11,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:11,946 INFO L225 Difference]: With dead ends: 37 [2021-12-06 20:13:11,946 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 20:13:11,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:13:11,947 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:11,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:13:11,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 20:13:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-06 20:13:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:13:11,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-06 20:13:11,951 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 27 [2021-12-06 20:13:11,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:11,952 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-06 20:13:11,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:13:11,952 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-06 20:13:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 20:13:11,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:11,953 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:11,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:13:12,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:12,155 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting recErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:12,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:12,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1297249887, now seen corresponding path program 1 times [2021-12-06 20:13:12,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:12,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739319214] [2021-12-06 20:13:12,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:12,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:12,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:13:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:12,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:13:12,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739319214] [2021-12-06 20:13:12,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739319214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:13:12,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:13:12,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:13:12,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390699650] [2021-12-06 20:13:12,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:13:12,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:13:12,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:12,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:13:12,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:13:12,264 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:13:12,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:12,282 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-12-06 20:13:12,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:13:12,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-06 20:13:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:12,286 INFO L225 Difference]: With dead ends: 36 [2021-12-06 20:13:12,286 INFO L226 Difference]: Without dead ends: 35 [2021-12-06 20:13:12,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:13:12,290 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:12,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:13:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-06 20:13:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-06 20:13:12,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:13:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-12-06 20:13:12,305 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 28 [2021-12-06 20:13:12,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:12,306 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-12-06 20:13:12,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:13:12,306 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-12-06 20:13:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 20:13:12,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:12,309 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:12,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 20:13:12,309 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:12,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:12,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1116627082, now seen corresponding path program 1 times [2021-12-06 20:13:12,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:12,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448368773] [2021-12-06 20:13:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:12,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:12,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:13:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:12,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 20:13:12,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:12,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448368773] [2021-12-06 20:13:12,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448368773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:12,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983110477] [2021-12-06 20:13:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:12,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:12,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:12,386 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:12,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:13:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:12,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:13:12,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 20:13:12,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 20:13:12,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983110477] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:12,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:12,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-06 20:13:12,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503055367] [2021-12-06 20:13:12,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:12,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 20:13:12,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:12,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 20:13:12,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:13:12,539 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 20:13:12,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:12,603 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2021-12-06 20:13:12,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 20:13:12,604 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-12-06 20:13:12,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:12,604 INFO L225 Difference]: With dead ends: 78 [2021-12-06 20:13:12,605 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 20:13:12,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-12-06 20:13:12,606 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:12,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 120 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:13:12,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 20:13:12,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2021-12-06 20:13:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:13:12,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-12-06 20:13:12,612 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 30 [2021-12-06 20:13:12,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:12,613 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-12-06 20:13:12,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 20:13:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-12-06 20:13:12,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 20:13:12,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:12,615 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:12,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:13:12,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 20:13:12,817 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1143138410, now seen corresponding path program 2 times [2021-12-06 20:13:12,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:12,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229713365] [2021-12-06 20:13:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:12,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:12,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 20:13:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:13,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:13,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:13,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 32 proven. 19 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 20:13:13,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:13,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229713365] [2021-12-06 20:13:13,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229713365] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:13,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564592838] [2021-12-06 20:13:13,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:13:13,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:13,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:13,088 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:13,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:13:13,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:13:13,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 20:13:13,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 41 proven. 8 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-06 20:13:13,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 42 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-06 20:13:13,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564592838] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:13,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:13,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 15 [2021-12-06 20:13:13,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945559941] [2021-12-06 20:13:13,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:13,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 20:13:13,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:13,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 20:13:13,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:13:13,313 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 20:13:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:13,410 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2021-12-06 20:13:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:13:13,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2021-12-06 20:13:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:13,411 INFO L225 Difference]: With dead ends: 99 [2021-12-06 20:13:13,411 INFO L226 Difference]: Without dead ends: 64 [2021-12-06 20:13:13,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-12-06 20:13:13,413 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:13,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 213 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:13:13,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-06 20:13:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-12-06 20:13:13,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:13:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-12-06 20:13:13,419 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 68 [2021-12-06 20:13:13,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:13,419 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-12-06 20:13:13,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 20:13:13,420 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-12-06 20:13:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 20:13:13,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:13,421 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:13,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 20:13:13,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 20:13:13,623 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:13,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:13,625 INFO L85 PathProgramCache]: Analyzing trace with hash 883326234, now seen corresponding path program 3 times [2021-12-06 20:13:13,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:13,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074524632] [2021-12-06 20:13:13,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:13,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:13,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 20:13:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:13,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:13,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:13,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-06 20:13:13,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:13,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074524632] [2021-12-06 20:13:13,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074524632] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:13,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721941002] [2021-12-06 20:13:13,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:13:13,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:13,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:13,843 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:13,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:13:13,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 20:13:13,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:13,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:13:13,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-06 20:13:13,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-06 20:13:14,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721941002] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:14,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:14,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 24 [2021-12-06 20:13:14,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845564962] [2021-12-06 20:13:14,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:14,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 20:13:14,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:14,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 20:13:14,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-12-06 20:13:14,092 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 20:13:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:14,289 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2021-12-06 20:13:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 20:13:14,289 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 74 [2021-12-06 20:13:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:14,291 INFO L225 Difference]: With dead ends: 115 [2021-12-06 20:13:14,291 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 20:13:14,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=511, Invalid=1559, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 20:13:14,294 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 148 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:14,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 135 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:13:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 20:13:14,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-12-06 20:13:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.127906976744186) internal successors, (97), 86 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 20:13:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-12-06 20:13:14,305 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 74 [2021-12-06 20:13:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:14,305 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-12-06 20:13:14,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 20:13:14,306 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-12-06 20:13:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 20:13:14,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:14,307 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 7, 7, 7, 7, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:14,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:13:14,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 20:13:14,509 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:14,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:14,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1187497949, now seen corresponding path program 4 times [2021-12-06 20:13:14,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:14,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60656983] [2021-12-06 20:13:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:14,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:14,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 20:13:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:14,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:14,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:14,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:14,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-06 20:13:14,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:14,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60656983] [2021-12-06 20:13:14,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60656983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:14,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087962064] [2021-12-06 20:13:14,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:13:14,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:14,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:14,709 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:14,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:13:14,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:13:14,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:14,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 20:13:14,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 12 proven. 211 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-06 20:13:14,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 12 proven. 211 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-06 20:13:15,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087962064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:15,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:15,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 32 [2021-12-06 20:13:15,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097344836] [2021-12-06 20:13:15,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:15,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 20:13:15,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:15,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 20:13:15,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 20:13:15,362 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 33 states, 32 states have (on average 2.65625) internal successors, (85), 24 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-06 20:13:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:15,545 INFO L93 Difference]: Finished difference Result 388 states and 445 transitions. [2021-12-06 20:13:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 20:13:15,546 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.65625) internal successors, (85), 24 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 103 [2021-12-06 20:13:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:15,549 INFO L225 Difference]: With dead ends: 388 [2021-12-06 20:13:15,549 INFO L226 Difference]: Without dead ends: 297 [2021-12-06 20:13:15,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=572, Invalid=2290, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 20:13:15,552 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 115 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:15,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 235 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:13:15,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-06 20:13:15,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 155. [2021-12-06 20:13:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 141 states have internal predecessors, (157), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 11 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 20:13:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2021-12-06 20:13:15,566 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 103 [2021-12-06 20:13:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:15,566 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2021-12-06 20:13:15,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.65625) internal successors, (85), 24 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-06 20:13:15,566 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2021-12-06 20:13:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-06 20:13:15,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:15,569 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 13, 12, 12, 12, 12, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:15,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 20:13:15,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:15,770 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:15,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:15,770 INFO L85 PathProgramCache]: Analyzing trace with hash -276321318, now seen corresponding path program 5 times [2021-12-06 20:13:15,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:15,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828981894] [2021-12-06 20:13:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:15,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:15,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 20:13:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:15,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:15,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:15,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:15,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:15,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:15,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:15,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:16,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:16,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 697 proven. 26 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2021-12-06 20:13:16,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:16,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828981894] [2021-12-06 20:13:16,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828981894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:16,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756623955] [2021-12-06 20:13:16,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:13:16,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:16,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:16,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:16,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:13:16,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 20:13:16,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:16,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 20:13:16,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 509 proven. 26 refuted. 0 times theorem prover too weak. 920 trivial. 0 not checked. [2021-12-06 20:13:16,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 513 proven. 22 refuted. 0 times theorem prover too weak. 920 trivial. 0 not checked. [2021-12-06 20:13:16,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756623955] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:16,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:16,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2021-12-06 20:13:16,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384053819] [2021-12-06 20:13:16,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:16,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 20:13:16,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:16,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 20:13:16,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:13:16,542 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:13:16,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:16,673 INFO L93 Difference]: Finished difference Result 301 states and 337 transitions. [2021-12-06 20:13:16,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:13:16,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 188 [2021-12-06 20:13:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:16,675 INFO L225 Difference]: With dead ends: 301 [2021-12-06 20:13:16,675 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 20:13:16,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 394 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-12-06 20:13:16,676 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:16,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 159 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:13:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 20:13:16,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2021-12-06 20:13:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 166 states have (on average 1.0903614457831325) internal successors, (181), 166 states have internal predecessors, (181), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 20:13:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 196 transitions. [2021-12-06 20:13:16,687 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 196 transitions. Word has length 188 [2021-12-06 20:13:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:16,687 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 196 transitions. [2021-12-06 20:13:16,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:13:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 196 transitions. [2021-12-06 20:13:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-06 20:13:16,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:16,690 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 13, 12, 12, 12, 12, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:16,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 20:13:16,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 20:13:16,892 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:16,893 INFO L85 PathProgramCache]: Analyzing trace with hash -264955121, now seen corresponding path program 6 times [2021-12-06 20:13:16,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:16,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895580323] [2021-12-06 20:13:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:16,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:16,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 20:13:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:17,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:17,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:17,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:17,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:17,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:17,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:17,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:17,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:17,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 840 proven. 53 refuted. 0 times theorem prover too weak. 957 trivial. 0 not checked. [2021-12-06 20:13:17,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:17,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895580323] [2021-12-06 20:13:17,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895580323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:17,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160874868] [2021-12-06 20:13:17,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:13:17,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:17,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:17,190 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:17,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:13:17,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 20:13:17,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:17,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:13:17,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 599 proven. 67 refuted. 0 times theorem prover too weak. 1184 trivial. 0 not checked. [2021-12-06 20:13:17,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 599 proven. 67 refuted. 0 times theorem prover too weak. 1184 trivial. 0 not checked. [2021-12-06 20:13:17,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160874868] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:17,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:17,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 39 [2021-12-06 20:13:17,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803900147] [2021-12-06 20:13:17,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:17,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 20:13:17,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:17,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 20:13:17,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 20:13:17,906 INFO L87 Difference]: Start difference. First operand 181 states and 196 transitions. Second operand has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 36 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 20:13:18,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:18,911 INFO L93 Difference]: Finished difference Result 739 states and 849 transitions. [2021-12-06 20:13:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 20:13:18,912 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 36 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 203 [2021-12-06 20:13:18,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:18,914 INFO L225 Difference]: With dead ends: 739 [2021-12-06 20:13:18,915 INFO L226 Difference]: Without dead ends: 583 [2021-12-06 20:13:18,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1535, Invalid=8167, Unknown=0, NotChecked=0, Total=9702 [2021-12-06 20:13:18,918 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 353 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:18,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 322 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:13:18,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-12-06 20:13:18,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 243. [2021-12-06 20:13:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 226 states have (on average 1.092920353982301) internal successors, (247), 226 states have internal predecessors, (247), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 14 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 20:13:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 264 transitions. [2021-12-06 20:13:18,940 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 264 transitions. Word has length 203 [2021-12-06 20:13:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:18,941 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 264 transitions. [2021-12-06 20:13:18,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 36 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 20:13:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 264 transitions. [2021-12-06 20:13:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-06 20:13:18,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:18,943 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 13, 12, 12, 12, 12, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:18,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:13:19,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:19,144 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:19,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:19,144 INFO L85 PathProgramCache]: Analyzing trace with hash 352475471, now seen corresponding path program 7 times [2021-12-06 20:13:19,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:19,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228202198] [2021-12-06 20:13:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:19,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:19,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 20:13:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:19,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:19,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:19,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:19,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:19,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:19,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:19,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:19,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:19,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2865 backedges. 1648 proven. 89 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2021-12-06 20:13:19,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:19,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228202198] [2021-12-06 20:13:19,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228202198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:19,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608302908] [2021-12-06 20:13:19,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:13:19,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:19,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:19,521 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:19,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:13:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:19,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 20:13:19,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2865 backedges. 1463 proven. 185 refuted. 0 times theorem prover too weak. 1217 trivial. 0 not checked. [2021-12-06 20:13:19,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2865 backedges. 1476 proven. 172 refuted. 0 times theorem prover too weak. 1217 trivial. 0 not checked. [2021-12-06 20:13:20,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608302908] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:20,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:20,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 31 [2021-12-06 20:13:20,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585994150] [2021-12-06 20:13:20,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:20,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 20:13:20,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 20:13:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-12-06 20:13:20,776 INFO L87 Difference]: Start difference. First operand 243 states and 264 transitions. Second operand has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 27 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 20:13:21,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:21,280 INFO L93 Difference]: Finished difference Result 499 states and 544 transitions. [2021-12-06 20:13:21,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 20:13:21,280 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 27 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) Word has length 233 [2021-12-06 20:13:21,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:21,282 INFO L225 Difference]: With dead ends: 499 [2021-12-06 20:13:21,283 INFO L226 Difference]: Without dead ends: 329 [2021-12-06 20:13:21,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 476 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=734, Invalid=3556, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 20:13:21,286 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:21,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 284 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:13:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-06 20:13:21,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 299. [2021-12-06 20:13:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 279 states have (on average 1.0788530465949822) internal successors, (301), 279 states have internal predecessors, (301), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 17 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-06 20:13:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 321 transitions. [2021-12-06 20:13:21,309 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 321 transitions. Word has length 233 [2021-12-06 20:13:21,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:21,309 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 321 transitions. [2021-12-06 20:13:21,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 27 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 20:13:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 321 transitions. [2021-12-06 20:13:21,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-06 20:13:21,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:21,314 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:21,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 20:13:21,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:21,516 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:21,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:21,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1653165142, now seen corresponding path program 8 times [2021-12-06 20:13:21,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:21,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171381704] [2021-12-06 20:13:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:21,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:21,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:13:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:21,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:21,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:21,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:21,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:21,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:21,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:21,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:21,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:21,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3119 backedges. 1918 proven. 134 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2021-12-06 20:13:21,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:21,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171381704] [2021-12-06 20:13:21,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171381704] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:21,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519106125] [2021-12-06 20:13:21,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:13:21,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:21,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:21,933 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:21,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:13:22,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:13:22,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:22,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 20:13:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3119 backedges. 1882 proven. 324 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2021-12-06 20:13:22,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3119 backedges. 1901 proven. 305 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2021-12-06 20:13:23,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519106125] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:23,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:23,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 38 [2021-12-06 20:13:23,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646561883] [2021-12-06 20:13:23,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:23,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 20:13:23,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:23,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 20:13:23,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 20:13:23,375 INFO L87 Difference]: Start difference. First operand 299 states and 321 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 33 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 20:13:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:24,131 INFO L93 Difference]: Finished difference Result 616 states and 661 transitions. [2021-12-06 20:13:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 20:13:24,131 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 33 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) Word has length 232 [2021-12-06 20:13:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:24,133 INFO L225 Difference]: With dead ends: 616 [2021-12-06 20:13:24,133 INFO L226 Difference]: Without dead ends: 431 [2021-12-06 20:13:24,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 471 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1214, Invalid=6268, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 20:13:24,136 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:24,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 428 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:13:24,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-12-06 20:13:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 379. [2021-12-06 20:13:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 355 states have (on average 1.0676056338028168) internal successors, (379), 355 states have internal predecessors, (379), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 21 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 20:13:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 403 transitions. [2021-12-06 20:13:24,157 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 403 transitions. Word has length 232 [2021-12-06 20:13:24,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:24,157 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 403 transitions. [2021-12-06 20:13:24,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 33 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 20:13:24,157 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 403 transitions. [2021-12-06 20:13:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-06 20:13:24,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:24,159 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:24,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 20:13:24,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 20:13:24,360 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:24,361 INFO L85 PathProgramCache]: Analyzing trace with hash 756753498, now seen corresponding path program 9 times [2021-12-06 20:13:24,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:24,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441688563] [2021-12-06 20:13:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:24,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:24,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:13:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:24,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:24,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:24,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:24,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:24,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:24,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:24,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:24,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:24,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3376 backedges. 2137 proven. 559 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-12-06 20:13:24,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:24,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441688563] [2021-12-06 20:13:24,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441688563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:24,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127557316] [2021-12-06 20:13:24,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:13:24,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:24,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:24,894 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:24,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:13:24,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 20:13:24,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:24,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:13:24,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3376 backedges. 829 proven. 70 refuted. 0 times theorem prover too weak. 2477 trivial. 0 not checked. [2021-12-06 20:13:25,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3376 backedges. 829 proven. 70 refuted. 0 times theorem prover too weak. 2477 trivial. 0 not checked. [2021-12-06 20:13:25,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127557316] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:25,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:25,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 17, 17] total 70 [2021-12-06 20:13:25,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911676505] [2021-12-06 20:13:25,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:25,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 20:13:25,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:25,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 20:13:25,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=4292, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 20:13:25,869 INFO L87 Difference]: Start difference. First operand 379 states and 403 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 62 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-06 20:13:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:30,847 INFO L93 Difference]: Finished difference Result 875 states and 1000 transitions. [2021-12-06 20:13:30,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 278 states. [2021-12-06 20:13:30,848 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 62 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 238 [2021-12-06 20:13:30,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:30,851 INFO L225 Difference]: With dead ends: 875 [2021-12-06 20:13:30,851 INFO L226 Difference]: Without dead ends: 793 [2021-12-06 20:13:30,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37851 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=17777, Invalid=91453, Unknown=0, NotChecked=0, Total=109230 [2021-12-06 20:13:30,864 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 403 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:30,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 481 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:13:30,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-12-06 20:13:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 430. [2021-12-06 20:13:30,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 406 states have (on average 1.0738916256157636) internal successors, (436), 406 states have internal predecessors, (436), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 21 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 20:13:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 460 transitions. [2021-12-06 20:13:30,901 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 460 transitions. Word has length 238 [2021-12-06 20:13:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:30,902 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 460 transitions. [2021-12-06 20:13:30,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 62 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-06 20:13:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 460 transitions. [2021-12-06 20:13:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-06 20:13:30,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:30,904 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:30,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 20:13:31,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 20:13:31,105 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:31,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2139325743, now seen corresponding path program 10 times [2021-12-06 20:13:31,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:31,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219513620] [2021-12-06 20:13:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:31,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:31,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:13:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:31,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:31,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:31,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:31,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:31,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:31,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:31,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:31,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:31,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 3086 proven. 823 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2021-12-06 20:13:31,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:31,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219513620] [2021-12-06 20:13:31,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219513620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:31,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395683658] [2021-12-06 20:13:31,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:13:31,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:31,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:31,717 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:31,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 20:13:31,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:13:31,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:31,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 20:13:31,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 3131 proven. 776 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2021-12-06 20:13:32,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 3165 proven. 742 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2021-12-06 20:13:33,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395683658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:33,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:33,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 39, 39] total 45 [2021-12-06 20:13:33,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326085465] [2021-12-06 20:13:33,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:33,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 20:13:33,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:33,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 20:13:33,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1759, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 20:13:33,560 INFO L87 Difference]: Start difference. First operand 430 states and 460 transitions. Second operand has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 36 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-06 20:13:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:34,545 INFO L93 Difference]: Finished difference Result 568 states and 610 transitions. [2021-12-06 20:13:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 20:13:34,545 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 36 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 265 [2021-12-06 20:13:34,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:34,548 INFO L225 Difference]: With dead ends: 568 [2021-12-06 20:13:34,548 INFO L226 Difference]: Without dead ends: 467 [2021-12-06 20:13:34,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 549 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2750 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2083, Invalid=11027, Unknown=0, NotChecked=0, Total=13110 [2021-12-06 20:13:34,550 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:34,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 654 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:13:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-06 20:13:34,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 433. [2021-12-06 20:13:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 409 states have (on average 1.0709046454767726) internal successors, (438), 409 states have internal predecessors, (438), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 21 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 20:13:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 462 transitions. [2021-12-06 20:13:34,573 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 462 transitions. Word has length 265 [2021-12-06 20:13:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:34,574 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 462 transitions. [2021-12-06 20:13:34,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 36 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-06 20:13:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 462 transitions. [2021-12-06 20:13:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-12-06 20:13:34,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:34,576 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:34,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 20:13:34,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 20:13:34,777 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:34,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:34,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1037648150, now seen corresponding path program 11 times [2021-12-06 20:13:34,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:34,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106438628] [2021-12-06 20:13:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:34,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:34,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:13:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:34,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:34,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:35,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:35,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:35,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:35,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:35,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:35,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:35,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4841 backedges. 0 proven. 3978 refuted. 0 times theorem prover too weak. 863 trivial. 0 not checked. [2021-12-06 20:13:35,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:35,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106438628] [2021-12-06 20:13:35,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106438628] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:35,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855163671] [2021-12-06 20:13:35,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:13:35,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:35,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:35,218 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:35,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 20:13:35,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-06 20:13:35,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:35,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 20:13:35,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4841 backedges. 1809 proven. 330 refuted. 0 times theorem prover too weak. 2702 trivial. 0 not checked. [2021-12-06 20:13:35,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4841 backedges. 1809 proven. 330 refuted. 0 times theorem prover too weak. 2702 trivial. 0 not checked. [2021-12-06 20:13:36,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855163671] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:36,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:36,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33, 33] total 95 [2021-12-06 20:13:36,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255693186] [2021-12-06 20:13:36,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:36,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-06 20:13:36,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:36,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-06 20:13:36,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1648, Invalid=7472, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 20:13:36,752 INFO L87 Difference]: Start difference. First operand 433 states and 462 transitions. Second operand has 96 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 86 states have internal predecessors, (189), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-06 20:13:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:39,072 INFO L93 Difference]: Finished difference Result 694 states and 774 transitions. [2021-12-06 20:13:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-12-06 20:13:39,072 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 86 states have internal predecessors, (189), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 268 [2021-12-06 20:13:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:39,075 INFO L225 Difference]: With dead ends: 694 [2021-12-06 20:13:39,075 INFO L226 Difference]: Without dead ends: 643 [2021-12-06 20:13:39,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20707 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=15924, Invalid=41916, Unknown=0, NotChecked=0, Total=57840 [2021-12-06 20:13:39,078 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1298 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:39,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1298 Valid, 242 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:13:39,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-12-06 20:13:39,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 562. [2021-12-06 20:13:39,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 537 states have (on average 1.0875232774674115) internal successors, (584), 537 states have internal predecessors, (584), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-06 20:13:39,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 609 transitions. [2021-12-06 20:13:39,116 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 609 transitions. Word has length 268 [2021-12-06 20:13:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:39,117 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 609 transitions. [2021-12-06 20:13:39,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 86 states have internal predecessors, (189), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-06 20:13:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 609 transitions. [2021-12-06 20:13:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-12-06 20:13:39,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:39,120 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 14, 13, 13, 13, 13, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:39,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 20:13:39,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:39,321 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:39,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash 866252902, now seen corresponding path program 12 times [2021-12-06 20:13:39,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:39,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945996798] [2021-12-06 20:13:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:39,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:39,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 20:13:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:39,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:39,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:39,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:39,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:39,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:39,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:39,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:39,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:39,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:39,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10122 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 2247 trivial. 0 not checked. [2021-12-06 20:13:39,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:39,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945996798] [2021-12-06 20:13:39,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945996798] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:39,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262076460] [2021-12-06 20:13:39,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:13:39,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:39,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:39,943 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:39,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 20:13:40,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-06 20:13:40,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:40,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:13:40,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10122 backedges. 4618 proven. 1995 refuted. 0 times theorem prover too weak. 3509 trivial. 0 not checked. [2021-12-06 20:13:40,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10122 backedges. 4618 proven. 1995 refuted. 0 times theorem prover too weak. 3509 trivial. 0 not checked. [2021-12-06 20:13:41,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262076460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:41,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:41,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 25, 25] total 75 [2021-12-06 20:13:41,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049989522] [2021-12-06 20:13:41,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:41,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-06 20:13:41,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:41,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-06 20:13:41,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=873, Invalid=4827, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 20:13:41,397 INFO L87 Difference]: Start difference. First operand 562 states and 609 transitions. Second operand has 76 states, 75 states have (on average 2.2666666666666666) internal successors, (170), 63 states have internal predecessors, (170), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-06 20:13:44,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:44,475 INFO L93 Difference]: Finished difference Result 1190 states and 1318 transitions. [2021-12-06 20:13:44,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2021-12-06 20:13:44,475 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 2.2666666666666666) internal successors, (170), 63 states have internal predecessors, (170), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) Word has length 364 [2021-12-06 20:13:44,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:44,479 INFO L225 Difference]: With dead ends: 1190 [2021-12-06 20:13:44,479 INFO L226 Difference]: Without dead ends: 901 [2021-12-06 20:13:44,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 708 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38669 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=20381, Invalid=61129, Unknown=0, NotChecked=0, Total=81510 [2021-12-06 20:13:44,484 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 896 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:44,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 261 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:13:44,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-12-06 20:13:44,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 709. [2021-12-06 20:13:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 681 states have (on average 1.1013215859030836) internal successors, (750), 681 states have internal predecessors, (750), 3 states have call successors, (3), 2 states have call predecessors, (3), 24 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) [2021-12-06 20:13:44,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 778 transitions. [2021-12-06 20:13:44,522 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 778 transitions. Word has length 364 [2021-12-06 20:13:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:44,523 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 778 transitions. [2021-12-06 20:13:44,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 2.2666666666666666) internal successors, (170), 63 states have internal predecessors, (170), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-06 20:13:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 778 transitions. [2021-12-06 20:13:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-12-06 20:13:44,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:44,534 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 15, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:44,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 20:13:44,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:44,735 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:44,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:44,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1968716438, now seen corresponding path program 13 times [2021-12-06 20:13:44,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:44,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566579290] [2021-12-06 20:13:44,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:44,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:44,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:13:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 23745 backedges. 14822 proven. 1579 refuted. 0 times theorem prover too weak. 7344 trivial. 0 not checked. [2021-12-06 20:13:45,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:45,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566579290] [2021-12-06 20:13:45,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566579290] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:45,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764797627] [2021-12-06 20:13:45,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:13:45,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:45,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:45,807 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:45,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 20:13:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:45,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 20:13:45,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 23745 backedges. 14879 proven. 1520 refuted. 0 times theorem prover too weak. 7346 trivial. 0 not checked. [2021-12-06 20:13:46,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 23745 backedges. 14932 proven. 1467 refuted. 0 times theorem prover too weak. 7346 trivial. 0 not checked. [2021-12-06 20:13:50,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764797627] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:50,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:50,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 49, 49] total 55 [2021-12-06 20:13:50,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43933945] [2021-12-06 20:13:50,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:50,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 20:13:50,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:50,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 20:13:50,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=2646, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 20:13:50,493 INFO L87 Difference]: Start difference. First operand 709 states and 778 transitions. Second operand has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 44 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-06 20:13:52,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:52,198 INFO L93 Difference]: Finished difference Result 1123 states and 1243 transitions. [2021-12-06 20:13:52,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-06 20:13:52,198 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 44 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 516 [2021-12-06 20:13:52,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:52,201 INFO L225 Difference]: With dead ends: 1123 [2021-12-06 20:13:52,201 INFO L226 Difference]: Without dead ends: 746 [2021-12-06 20:13:52,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1222 GetRequests, 1061 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5938 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4179, Invalid=21581, Unknown=0, NotChecked=0, Total=25760 [2021-12-06 20:13:52,204 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 79 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:52,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 808 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:13:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-12-06 20:13:52,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 712. [2021-12-06 20:13:52,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 684 states have (on average 1.0891812865497077) internal successors, (745), 684 states have internal predecessors, (745), 3 states have call successors, (3), 2 states have call predecessors, (3), 24 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) [2021-12-06 20:13:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 773 transitions. [2021-12-06 20:13:52,240 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 773 transitions. Word has length 516 [2021-12-06 20:13:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:52,241 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 773 transitions. [2021-12-06 20:13:52,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 44 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-06 20:13:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 773 transitions. [2021-12-06 20:13:52,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2021-12-06 20:13:52,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:52,253 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 17, 16, 16, 16, 16, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:52,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-06 20:13:52,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:52,455 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:13:52,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:52,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2137096239, now seen corresponding path program 14 times [2021-12-06 20:13:52,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:52,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091741815] [2021-12-06 20:13:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:52,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:52,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 20:13:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:52,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:53,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:53,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:53,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:53,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:53,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:53,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:53,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:53,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:53,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:53,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:53,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:53,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:13:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 24265 backedges. 11799 proven. 6875 refuted. 0 times theorem prover too weak. 5591 trivial. 0 not checked. [2021-12-06 20:13:53,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:53,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091741815] [2021-12-06 20:13:53,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091741815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:53,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040598320] [2021-12-06 20:13:53,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:13:53,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:53,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:53,674 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:53,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 20:13:53,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:13:53,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:53,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 20:13:53,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24265 backedges. 11832 proven. 6842 refuted. 0 times theorem prover too weak. 5591 trivial. 0 not checked. [2021-12-06 20:13:54,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:14:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24265 backedges. 11832 proven. 6842 refuted. 0 times theorem prover too weak. 5591 trivial. 0 not checked. [2021-12-06 20:14:00,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040598320] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:14:00,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:14:00,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 63 [2021-12-06 20:14:00,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438471613] [2021-12-06 20:14:00,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:14:00,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 20:14:00,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:14:00,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 20:14:00,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=3461, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 20:14:00,110 INFO L87 Difference]: Start difference. First operand 712 states and 773 transitions. Second operand has 63 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 51 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-06 20:14:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:14:01,412 INFO L93 Difference]: Finished difference Result 1228 states and 1337 transitions. [2021-12-06 20:14:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-12-06 20:14:01,412 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 51 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) Word has length 529 [2021-12-06 20:14:01,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:14:01,415 INFO L225 Difference]: With dead ends: 1228 [2021-12-06 20:14:01,415 INFO L226 Difference]: Without dead ends: 593 [2021-12-06 20:14:01,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1301 GetRequests, 1096 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19097 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=7627, Invalid=35015, Unknown=0, NotChecked=0, Total=42642 [2021-12-06 20:14:01,420 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 437 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:14:01,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 276 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:14:01,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-12-06 20:14:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2021-12-06 20:14:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 574 states have (on average 1.0731707317073171) internal successors, (616), 574 states have internal predecessors, (616), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 16 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-06 20:14:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 635 transitions. [2021-12-06 20:14:01,449 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 635 transitions. Word has length 529 [2021-12-06 20:14:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:14:01,450 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 635 transitions. [2021-12-06 20:14:01,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 51 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-06 20:14:01,450 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 635 transitions. [2021-12-06 20:14:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2021-12-06 20:14:01,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:14:01,454 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 18, 17, 17, 17, 17, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2021-12-06 20:14:01,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 20:14:01,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 20:14:01,656 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:14:01,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:14:01,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1828645878, now seen corresponding path program 15 times [2021-12-06 20:14:01,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:14:01,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447582054] [2021-12-06 20:14:01,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:14:01,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:14:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:01,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 20:14:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 28435 backedges. 18626 proven. 2089 refuted. 0 times theorem prover too weak. 7720 trivial. 0 not checked. [2021-12-06 20:14:02,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:14:02,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447582054] [2021-12-06 20:14:02,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447582054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:14:02,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260169956] [2021-12-06 20:14:02,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:14:02,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:14:02,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:14:02,977 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:14:02,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 20:14:03,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-06 20:14:03,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:14:03,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 20:14:03,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:14:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 28435 backedges. 13649 proven. 6373 refuted. 0 times theorem prover too weak. 8413 trivial. 0 not checked. [2021-12-06 20:14:04,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:14:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 28435 backedges. 13649 proven. 6373 refuted. 0 times theorem prover too weak. 8413 trivial. 0 not checked. [2021-12-06 20:14:06,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260169956] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:14:06,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:14:06,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 32, 32] total 120 [2021-12-06 20:14:06,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395385531] [2021-12-06 20:14:06,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:14:06,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-12-06 20:14:06,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:14:06,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-12-06 20:14:06,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1238, Invalid=13042, Unknown=0, NotChecked=0, Total=14280 [2021-12-06 20:14:06,200 INFO L87 Difference]: Start difference. First operand 593 states and 635 transitions. Second operand has 120 states, 120 states have (on average 2.15) internal successors, (258), 102 states have internal predecessors, (258), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) [2021-12-06 20:14:19,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:14:19,155 INFO L93 Difference]: Finished difference Result 1769 states and 1971 transitions. [2021-12-06 20:14:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 411 states. [2021-12-06 20:14:19,155 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.15) internal successors, (258), 102 states have internal predecessors, (258), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) Word has length 570 [2021-12-06 20:14:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:14:19,159 INFO L225 Difference]: With dead ends: 1769 [2021-12-06 20:14:19,159 INFO L226 Difference]: Without dead ends: 1170 [2021-12-06 20:14:19,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1634 GetRequests, 1111 SyntacticMatches, 0 SemanticMatches, 523 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99796 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=42145, Invalid=232955, Unknown=0, NotChecked=0, Total=275100 [2021-12-06 20:14:19,173 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 1849 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1849 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 2993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 2469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:14:19,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1849 Valid, 778 Invalid, 2993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 2469 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:14:19,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-12-06 20:14:19,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 764. [2021-12-06 20:14:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 742 states have (on average 1.0795148247978437) internal successors, (801), 742 states have internal predecessors, (801), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 19 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 20:14:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 823 transitions. [2021-12-06 20:14:19,217 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 823 transitions. Word has length 570 [2021-12-06 20:14:19,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:14:19,217 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 823 transitions. [2021-12-06 20:14:19,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.15) internal successors, (258), 102 states have internal predecessors, (258), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) [2021-12-06 20:14:19,218 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 823 transitions. [2021-12-06 20:14:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2021-12-06 20:14:19,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:14:19,224 INFO L514 BasicCegarLoop]: trace histogram [182, 182, 182, 21, 20, 20, 20, 20, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2021-12-06 20:14:19,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 20:14:19,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 20:14:19,425 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:14:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:14:19,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1485309775, now seen corresponding path program 16 times [2021-12-06 20:14:19,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:14:19,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061468027] [2021-12-06 20:14:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:14:19,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:14:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:19,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 20:14:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:20,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:20,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:20,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:20,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:21,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:21,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:21,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:21,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:21,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:21,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:21,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:21,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:21,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:21,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:21,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:21,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:21,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 54580 backedges. 31809 proven. 593 refuted. 0 times theorem prover too weak. 22178 trivial. 0 not checked. [2021-12-06 20:14:21,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:14:21,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061468027] [2021-12-06 20:14:21,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061468027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:14:21,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480418680] [2021-12-06 20:14:21,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:14:21,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:14:21,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:14:21,305 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:14:21,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 20:14:21,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:14:21,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:14:21,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 1719 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 20:14:21,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:14:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 54580 backedges. 33264 proven. 2628 refuted. 0 times theorem prover too weak. 18688 trivial. 0 not checked. [2021-12-06 20:14:22,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:14:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 54580 backedges. 33340 proven. 2552 refuted. 0 times theorem prover too weak. 18688 trivial. 0 not checked. [2021-12-06 20:14:31,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480418680] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:14:31,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:14:31,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 59, 59] total 80 [2021-12-06 20:14:31,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596716273] [2021-12-06 20:14:31,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:14:31,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 20:14:31,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:14:31,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 20:14:31,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=5755, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 20:14:31,918 INFO L87 Difference]: Start difference. First operand 764 states and 823 transitions. Second operand has 80 states, 80 states have (on average 2.2625) internal successors, (181), 69 states have internal predecessors, (181), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-06 20:14:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:14:36,466 INFO L93 Difference]: Finished difference Result 1213 states and 1331 transitions. [2021-12-06 20:14:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-12-06 20:14:36,466 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2625) internal successors, (181), 69 states have internal predecessors, (181), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 759 [2021-12-06 20:14:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:14:36,470 INFO L225 Difference]: With dead ends: 1213 [2021-12-06 20:14:36,470 INFO L226 Difference]: Without dead ends: 770 [2021-12-06 20:14:36,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1781 GetRequests, 1525 SyntacticMatches, 3 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19000 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9239, Invalid=55531, Unknown=0, NotChecked=0, Total=64770 [2021-12-06 20:14:36,477 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 124 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 5829 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 5844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 5829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:14:36,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 631 Invalid, 5844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 5829 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 20:14:36,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-12-06 20:14:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 770. [2021-12-06 20:14:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 748 states have (on average 1.0735294117647058) internal successors, (803), 748 states have internal predecessors, (803), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 19 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 20:14:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 825 transitions. [2021-12-06 20:14:36,532 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 825 transitions. Word has length 759 [2021-12-06 20:14:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:14:36,533 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 825 transitions. [2021-12-06 20:14:36,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2625) internal successors, (181), 69 states have internal predecessors, (181), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-06 20:14:36,533 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 825 transitions. [2021-12-06 20:14:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2021-12-06 20:14:36,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:14:36,542 INFO L514 BasicCegarLoop]: trace histogram [184, 184, 184, 21, 20, 20, 20, 20, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2021-12-06 20:14:36,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 20:14:36,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 20:14:36,743 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:14:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:14:36,745 INFO L85 PathProgramCache]: Analyzing trace with hash -475890625, now seen corresponding path program 17 times [2021-12-06 20:14:36,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:14:36,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768255332] [2021-12-06 20:14:36,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:14:36,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:14:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:37,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 20:14:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:37,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:37,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:37,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:37,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:38,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:38,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:38,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:38,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:38,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:38,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:38,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:38,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:38,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:38,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:38,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:38,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:39,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:39,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 55711 backedges. 36838 proven. 3418 refuted. 0 times theorem prover too weak. 15455 trivial. 0 not checked. [2021-12-06 20:14:39,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:14:39,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768255332] [2021-12-06 20:14:39,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768255332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:14:39,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152664352] [2021-12-06 20:14:39,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:14:39,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:14:39,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:14:39,121 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:14:39,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 20:14:39,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-12-06 20:14:39,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:14:39,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1546 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 20:14:39,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:14:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 55711 backedges. 32832 proven. 701 refuted. 0 times theorem prover too weak. 22178 trivial. 0 not checked. [2021-12-06 20:14:40,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:14:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 55711 backedges. 32866 proven. 667 refuted. 0 times theorem prover too weak. 22178 trivial. 0 not checked. [2021-12-06 20:14:42,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152664352] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:14:42,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:14:42,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 53, 53] total 114 [2021-12-06 20:14:42,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432618754] [2021-12-06 20:14:42,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:14:42,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-12-06 20:14:42,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:14:42,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-12-06 20:14:42,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=11882, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 20:14:42,458 INFO L87 Difference]: Start difference. First operand 770 states and 825 transitions. Second operand has 114 states, 114 states have (on average 2.0701754385964914) internal successors, (236), 100 states have internal predecessors, (236), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-06 20:14:50,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:14:50,778 INFO L93 Difference]: Finished difference Result 1177 states and 1285 transitions. [2021-12-06 20:14:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2021-12-06 20:14:50,778 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0701754385964914) internal successors, (236), 100 states have internal predecessors, (236), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 765 [2021-12-06 20:14:50,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:14:50,781 INFO L225 Difference]: With dead ends: 1177 [2021-12-06 20:14:50,781 INFO L226 Difference]: Without dead ends: 773 [2021-12-06 20:14:50,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1853 GetRequests, 1523 SyntacticMatches, 2 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24715 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=15141, Invalid=93429, Unknown=0, NotChecked=0, Total=108570 [2021-12-06 20:14:50,786 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 229 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 7974 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 8024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 7974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:14:50,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 955 Invalid, 8024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 7974 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 20:14:50,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-12-06 20:14:50,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 773. [2021-12-06 20:14:50,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 751 states have (on average 1.0679094540612517) internal successors, (802), 751 states have internal predecessors, (802), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 19 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 20:14:50,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 824 transitions. [2021-12-06 20:14:50,830 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 824 transitions. Word has length 765 [2021-12-06 20:14:50,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:14:50,830 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 824 transitions. [2021-12-06 20:14:50,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.0701754385964914) internal successors, (236), 100 states have internal predecessors, (236), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-06 20:14:50,831 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 824 transitions. [2021-12-06 20:14:50,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2021-12-06 20:14:50,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:14:50,836 INFO L514 BasicCegarLoop]: trace histogram [185, 185, 185, 19, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2021-12-06 20:14:50,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 20:14:51,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 20:14:51,037 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:14:51,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:14:51,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2049729034, now seen corresponding path program 18 times [2021-12-06 20:14:51,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:14:51,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948673185] [2021-12-06 20:14:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:14:51,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:14:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:51,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:14:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:51,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:51,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:52,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:52,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:52,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:52,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:52,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:52,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:52,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:53,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:53,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:53,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:53,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:53,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:53,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:53,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:53,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:14:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 56092 backedges. 27280 proven. 17087 refuted. 0 times theorem prover too weak. 11725 trivial. 0 not checked. [2021-12-06 20:14:53,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:14:53,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948673185] [2021-12-06 20:14:53,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948673185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:14:53,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38989705] [2021-12-06 20:14:53,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:14:53,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:14:53,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:14:53,488 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:14:53,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 20:14:53,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-12-06 20:14:53,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:14:53,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 20:14:53,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:14:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 56092 backedges. 18231 proven. 30446 refuted. 0 times theorem prover too weak. 7415 trivial. 0 not checked. [2021-12-06 20:14:55,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:15:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 56092 backedges. 18231 proven. 30446 refuted. 0 times theorem prover too weak. 7415 trivial. 0 not checked. [2021-12-06 20:15:01,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38989705] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:15:01,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:15:01,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 45, 45] total 148 [2021-12-06 20:15:01,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212747120] [2021-12-06 20:15:01,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:15:01,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2021-12-06 20:15:01,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:15:01,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-12-06 20:15:01,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2194, Invalid=19562, Unknown=0, NotChecked=0, Total=21756 [2021-12-06 20:15:01,951 INFO L87 Difference]: Start difference. First operand 773 states and 824 transitions. Second operand has 148 states, 148 states have (on average 2.25) internal successors, (333), 122 states have internal predecessors, (333), 1 states have call successors, (2), 1 states have call predecessors, (2), 28 states have return successors, (28), 28 states have call predecessors, (28), 1 states have call successors, (28) [2021-12-06 20:15:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:15:21,083 INFO L93 Difference]: Finished difference Result 4919 states and 5468 transitions. [2021-12-06 20:15:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 694 states. [2021-12-06 20:15:21,083 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.25) internal successors, (333), 122 states have internal predecessors, (333), 1 states have call successors, (2), 1 states have call predecessors, (2), 28 states have return successors, (28), 28 states have call predecessors, (28), 1 states have call successors, (28) Word has length 758 [2021-12-06 20:15:21,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:15:21,093 INFO L225 Difference]: With dead ends: 4919 [2021-12-06 20:15:21,093 INFO L226 Difference]: Without dead ends: 3699 [2021-12-06 20:15:21,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2262 GetRequests, 1482 SyntacticMatches, 0 SemanticMatches, 780 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326323 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=131616, Invalid=479126, Unknown=0, NotChecked=0, Total=610742 [2021-12-06 20:15:21,125 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3663 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 1467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3663 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 2285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1467 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:15:21,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3663 Valid, 396 Invalid, 2285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1467 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:15:21,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2021-12-06 20:15:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 1271. [2021-12-06 20:15:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1240 states have (on average 1.070967741935484) internal successors, (1328), 1240 states have internal predecessors, (1328), 3 states have call successors, (3), 2 states have call predecessors, (3), 27 states have return successors, (28), 28 states have call predecessors, (28), 2 states have call successors, (28) [2021-12-06 20:15:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1359 transitions. [2021-12-06 20:15:21,230 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1359 transitions. Word has length 758 [2021-12-06 20:15:21,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:15:21,230 INFO L470 AbstractCegarLoop]: Abstraction has 1271 states and 1359 transitions. [2021-12-06 20:15:21,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 2.25) internal successors, (333), 122 states have internal predecessors, (333), 1 states have call successors, (2), 1 states have call predecessors, (2), 28 states have return successors, (28), 28 states have call predecessors, (28), 1 states have call successors, (28) [2021-12-06 20:15:21,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1359 transitions. [2021-12-06 20:15:21,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1299 [2021-12-06 20:15:21,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:15:21,244 INFO L514 BasicCegarLoop]: trace histogram [332, 332, 332, 28, 27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2021-12-06 20:15:21,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 20:15:21,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 20:15:21,445 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:15:21,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:21,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1556806458, now seen corresponding path program 19 times [2021-12-06 20:15:21,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:21,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757638592] [2021-12-06 20:15:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:21,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:22,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:15:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:23,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:24,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:25,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:25,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:26,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:27,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:27,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:27,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:28,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:28,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:28,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:28,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:28,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:28,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:28,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:29,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:29,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:29,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:29,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:29,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:29,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:29,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:29,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:29,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:29,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:29,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:15:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 177691 backedges. 96842 proven. 818 refuted. 0 times theorem prover too weak. 80031 trivial. 0 not checked. [2021-12-06 20:15:29,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:15:29,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757638592] [2021-12-06 20:15:29,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757638592] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:15:29,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829017900] [2021-12-06 20:15:29,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:15:29,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:15:29,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:29,106 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:15:29,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 20:15:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:29,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 2958 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 20:15:29,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 177691 backedges. 89747 proven. 4172 refuted. 0 times theorem prover too weak. 83772 trivial. 0 not checked. [2021-12-06 20:15:31,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:15:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 177691 backedges. 89850 proven. 4069 refuted. 0 times theorem prover too weak. 83772 trivial. 0 not checked. [2021-12-06 20:15:55,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829017900] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:15:55,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:15:55,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 69, 69] total 94 [2021-12-06 20:15:55,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036780603] [2021-12-06 20:15:55,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:15:55,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 20:15:55,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:15:55,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 20:15:55,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=758, Invalid=7984, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 20:15:55,650 INFO L87 Difference]: Start difference. First operand 1271 states and 1359 transitions. Second operand has 94 states, 94 states have (on average 2.223404255319149) internal successors, (209), 81 states have internal predecessors, (209), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-06 20:16:02,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:16:02,083 INFO L93 Difference]: Finished difference Result 2134 states and 2311 transitions. [2021-12-06 20:16:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2021-12-06 20:16:02,083 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.223404255319149) internal successors, (209), 81 states have internal predecessors, (209), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) Word has length 1298 [2021-12-06 20:16:02,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:16:02,087 INFO L225 Difference]: With dead ends: 2134 [2021-12-06 20:16:02,087 INFO L226 Difference]: Without dead ends: 1280 [2021-12-06 20:16:02,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2948 GetRequests, 2620 SyntacticMatches, 3 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32174 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14936, Invalid=91666, Unknown=0, NotChecked=0, Total=106602 [2021-12-06 20:16:02,095 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 143 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 7424 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 7440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 7424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:16:02,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 808 Invalid, 7440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 7424 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 20:16:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-12-06 20:16:02,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1280. [2021-12-06 20:16:02,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1249 states have (on average 1.0624499599679744) internal successors, (1327), 1249 states have internal predecessors, (1327), 3 states have call successors, (3), 2 states have call predecessors, (3), 27 states have return successors, (28), 28 states have call predecessors, (28), 2 states have call successors, (28) [2021-12-06 20:16:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1358 transitions. [2021-12-06 20:16:02,189 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1358 transitions. Word has length 1298 [2021-12-06 20:16:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:16:02,189 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 1358 transitions. [2021-12-06 20:16:02,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.223404255319149) internal successors, (209), 81 states have internal predecessors, (209), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-06 20:16:02,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1358 transitions. [2021-12-06 20:16:02,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1311 [2021-12-06 20:16:02,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:16:02,203 INFO L514 BasicCegarLoop]: trace histogram [336, 336, 336, 28, 27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2021-12-06 20:16:02,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 20:16:02,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 20:16:02,405 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:16:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:16:02,406 INFO L85 PathProgramCache]: Analyzing trace with hash 999293158, now seen corresponding path program 20 times [2021-12-06 20:16:02,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:16:02,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743015798] [2021-12-06 20:16:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:16:02,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:16:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:03,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:16:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:04,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:05,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:06,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:07,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:07,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:08,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:08,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:08,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:09,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:09,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:09,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 181801 backedges. 100089 proven. 944 refuted. 0 times theorem prover too weak. 80768 trivial. 0 not checked. [2021-12-06 20:16:10,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:16:10,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743015798] [2021-12-06 20:16:10,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743015798] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:16:10,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602294615] [2021-12-06 20:16:10,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:16:10,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:16:10,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:16:10,273 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:16:10,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 20:16:11,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:16:11,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:16:11,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 2986 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 20:16:11,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:16:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 181801 backedges. 100354 proven. 5130 refuted. 0 times theorem prover too weak. 76317 trivial. 0 not checked. [2021-12-06 20:16:12,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:16:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 181801 backedges. 100472 proven. 5012 refuted. 0 times theorem prover too weak. 76317 trivial. 0 not checked. [2021-12-06 20:16:40,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602294615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:16:40,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:16:40,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 74, 74] total 101 [2021-12-06 20:16:40,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962427027] [2021-12-06 20:16:40,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:16:40,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-06 20:16:40,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:16:40,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-06 20:16:40,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=9235, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 20:16:40,731 INFO L87 Difference]: Start difference. First operand 1280 states and 1358 transitions. Second operand has 101 states, 101 states have (on average 2.207920792079208) internal successors, (223), 87 states have internal predecessors, (223), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-06 20:16:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:16:48,468 INFO L93 Difference]: Finished difference Result 2104 states and 2261 transitions. [2021-12-06 20:16:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 282 states. [2021-12-06 20:16:48,468 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.207920792079208) internal successors, (223), 87 states have internal predecessors, (223), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 1310 [2021-12-06 20:16:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:16:48,472 INFO L225 Difference]: With dead ends: 2104 [2021-12-06 20:16:48,472 INFO L226 Difference]: Without dead ends: 1289 [2021-12-06 20:16:48,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3008 GetRequests, 2641 SyntacticMatches, 3 SemanticMatches, 364 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40786 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=18584, Invalid=115006, Unknown=0, NotChecked=0, Total=133590 [2021-12-06 20:16:48,479 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 151 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 8885 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 8902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 8885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:16:48,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 889 Invalid, 8902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 8885 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 20:16:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-12-06 20:16:48,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1289. [2021-12-06 20:16:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1258 states have (on average 1.0548489666136724) internal successors, (1327), 1258 states have internal predecessors, (1327), 3 states have call successors, (3), 2 states have call predecessors, (3), 27 states have return successors, (28), 28 states have call predecessors, (28), 2 states have call successors, (28) [2021-12-06 20:16:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1358 transitions. [2021-12-06 20:16:48,576 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1358 transitions. Word has length 1310 [2021-12-06 20:16:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:16:48,577 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 1358 transitions. [2021-12-06 20:16:48,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.207920792079208) internal successors, (223), 87 states have internal predecessors, (223), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-06 20:16:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1358 transitions. [2021-12-06 20:16:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1330 [2021-12-06 20:16:48,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:16:48,591 INFO L514 BasicCegarLoop]: trace histogram [339, 339, 339, 30, 29, 29, 29, 29, 27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2021-12-06 20:16:48,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 20:16:48,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 20:16:48,792 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:16:48,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:16:48,794 INFO L85 PathProgramCache]: Analyzing trace with hash 811125635, now seen corresponding path program 21 times [2021-12-06 20:16:48,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:16:48,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663023565] [2021-12-06 20:16:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:16:48,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:16:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:50,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 20:16:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:51,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:52,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:52,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:53,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:54,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:54,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:55,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:55,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:56,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:56,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:56,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:56,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:56,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:56,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:56,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:56,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:56,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:56,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:56,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:56,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:56,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:56,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:57,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:57,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:57,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:57,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:16:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 185194 backedges. 102695 proven. 1079 refuted. 0 times theorem prover too weak. 81420 trivial. 0 not checked. [2021-12-06 20:16:57,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:16:57,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663023565] [2021-12-06 20:16:57,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663023565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:16:57,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730868217] [2021-12-06 20:16:57,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:16:57,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:16:57,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:16:57,023 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:16:57,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 20:16:58,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-12-06 20:16:58,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:16:58,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1744 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 20:16:58,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:17:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 185194 backedges. 46849 proven. 2658 refuted. 0 times theorem prover too weak. 135687 trivial. 0 not checked. [2021-12-06 20:17:00,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:17:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 185194 backedges. 46849 proven. 2658 refuted. 0 times theorem prover too weak. 135687 trivial. 0 not checked. [2021-12-06 20:17:03,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730868217] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:17:03,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:17:03,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 48, 48] total 159 [2021-12-06 20:17:03,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838326037] [2021-12-06 20:17:03,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:17:03,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2021-12-06 20:17:03,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:17:03,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-12-06 20:17:03,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2936, Invalid=22186, Unknown=0, NotChecked=0, Total=25122 [2021-12-06 20:17:03,275 INFO L87 Difference]: Start difference. First operand 1289 states and 1358 transitions. Second operand has 159 states, 159 states have (on average 1.6981132075471699) internal successors, (270), 156 states have internal predecessors, (270), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 20:17:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:17:14,837 INFO L93 Difference]: Finished difference Result 5432 states and 6247 transitions. [2021-12-06 20:17:14,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 305 states. [2021-12-06 20:17:14,837 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.6981132075471699) internal successors, (270), 156 states have internal predecessors, (270), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 1329 [2021-12-06 20:17:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:17:14,850 INFO L225 Difference]: With dead ends: 5432 [2021-12-06 20:17:14,850 INFO L226 Difference]: Without dead ends: 4433 [2021-12-06 20:17:14,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3085 GetRequests, 2628 SyntacticMatches, 0 SemanticMatches, 457 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63799 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=30152, Invalid=180070, Unknown=0, NotChecked=0, Total=210222 [2021-12-06 20:17:14,864 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 2952 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 3736 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2952 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 4269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 3736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:17:14,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2952 Valid, 1061 Invalid, 4269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 3736 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 20:17:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4433 states. [2021-12-06 20:17:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4433 to 1436. [2021-12-06 20:17:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1405 states have (on average 1.0676156583629892) internal successors, (1500), 1405 states have internal predecessors, (1500), 3 states have call successors, (3), 2 states have call predecessors, (3), 27 states have return successors, (28), 28 states have call predecessors, (28), 2 states have call successors, (28) [2021-12-06 20:17:15,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 1531 transitions. [2021-12-06 20:17:15,029 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 1531 transitions. Word has length 1329 [2021-12-06 20:17:15,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:17:15,029 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 1531 transitions. [2021-12-06 20:17:15,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.6981132075471699) internal successors, (270), 156 states have internal predecessors, (270), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 20:17:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 1531 transitions. [2021-12-06 20:17:15,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1431 [2021-12-06 20:17:15,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:17:15,045 INFO L514 BasicCegarLoop]: trace histogram [376, 376, 376, 28, 27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2021-12-06 20:17:15,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 20:17:15,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:17:15,246 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:17:15,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:17:15,247 INFO L85 PathProgramCache]: Analyzing trace with hash 283077334, now seen corresponding path program 22 times [2021-12-06 20:17:15,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:17:15,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669732547] [2021-12-06 20:17:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:15,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:17:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:16,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:17:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:17,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:18,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:19,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:20,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:21,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:21,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:22,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:22,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:23,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:23,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:23,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:23,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:23,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:24,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:24,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:24,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:24,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:24,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:24,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:24,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:24,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:24,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:24,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:24,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:25,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:25,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:17:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 225541 backedges. 136823 proven. 7564 refuted. 0 times theorem prover too weak. 81154 trivial. 0 not checked. [2021-12-06 20:17:25,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:17:25,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669732547] [2021-12-06 20:17:25,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669732547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:17:25,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670493626] [2021-12-06 20:17:25,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:17:25,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:17:25,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:17:25,121 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:17:25,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 20:17:26,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:17:26,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:17:26,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 3266 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-06 20:17:26,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:17:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 225541 backedges. 136922 proven. 7463 refuted. 0 times theorem prover too weak. 81156 trivial. 0 not checked. [2021-12-06 20:17:27,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:18:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 225541 backedges. 137073 proven. 7312 refuted. 0 times theorem prover too weak. 81156 trivial. 0 not checked. [2021-12-06 20:18:02,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670493626] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:18:02,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:18:02,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 84, 84] total 90 [2021-12-06 20:18:02,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146220987] [2021-12-06 20:18:02,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:18:02,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-06 20:18:02,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:02,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-06 20:18:02,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=7168, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 20:18:02,516 INFO L87 Difference]: Start difference. First operand 1436 states and 1531 transitions. Second operand has 90 states, 90 states have (on average 2.3444444444444446) internal successors, (211), 72 states have internal predecessors, (211), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) [2021-12-06 20:18:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:09,406 INFO L93 Difference]: Finished difference Result 2299 states and 2486 transitions. [2021-12-06 20:18:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 331 states. [2021-12-06 20:18:09,406 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.3444444444444446) internal successors, (211), 72 states have internal predecessors, (211), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) Word has length 1430 [2021-12-06 20:18:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:09,411 INFO L225 Difference]: With dead ends: 2299 [2021-12-06 20:18:09,411 INFO L226 Difference]: Without dead ends: 1439 [2021-12-06 20:18:09,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3305 GetRequests, 2921 SyntacticMatches, 2 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42754 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=25971, Invalid=121101, Unknown=0, NotChecked=0, Total=147072 [2021-12-06 20:18:09,420 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 116 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 2748 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:09,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1244 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:18:09,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-12-06 20:18:09,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1439. [2021-12-06 20:18:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1408 states have (on average 1.0610795454545454) internal successors, (1494), 1408 states have internal predecessors, (1494), 3 states have call successors, (3), 2 states have call predecessors, (3), 27 states have return successors, (28), 28 states have call predecessors, (28), 2 states have call successors, (28) [2021-12-06 20:18:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1525 transitions. [2021-12-06 20:18:09,551 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1525 transitions. Word has length 1430 [2021-12-06 20:18:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:09,552 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1525 transitions. [2021-12-06 20:18:09,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.3444444444444446) internal successors, (211), 72 states have internal predecessors, (211), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) [2021-12-06 20:18:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1525 transitions. [2021-12-06 20:18:09,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1434 [2021-12-06 20:18:09,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:09,568 INFO L514 BasicCegarLoop]: trace histogram [377, 377, 377, 28, 27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2021-12-06 20:18:09,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 20:18:09,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:18:09,769 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:18:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:09,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1740815235, now seen corresponding path program 23 times [2021-12-06 20:18:09,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:09,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050019708] [2021-12-06 20:18:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:09,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:11,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:18:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:12,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:13,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:14,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:14,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:15,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:16,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:16,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:17,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:17,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:17,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:18,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:18,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:18,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:18,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:18,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:18,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:19,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:19,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:19,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:19,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:19,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:19,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:19,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:19,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:19,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:19,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 226696 backedges. 112351 proven. 44766 refuted. 0 times theorem prover too weak. 69579 trivial. 0 not checked. [2021-12-06 20:18:19,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:19,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050019708] [2021-12-06 20:18:19,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050019708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:18:19,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363670460] [2021-12-06 20:18:19,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:18:19,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:18:19,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:18:19,709 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:18:19,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 20:18:21,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2021-12-06 20:18:21,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:18:21,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 2689 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 20:18:21,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:18:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 226696 backedges. 127620 proven. 1379 refuted. 0 times theorem prover too weak. 97697 trivial. 0 not checked. [2021-12-06 20:18:23,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:18:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 226696 backedges. 127620 proven. 1379 refuted. 0 times theorem prover too weak. 97697 trivial. 0 not checked. [2021-12-06 20:18:27,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363670460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:18:27,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:18:27,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 77, 77] total 165 [2021-12-06 20:18:27,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803872051] [2021-12-06 20:18:27,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:18:27,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2021-12-06 20:18:27,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:27,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2021-12-06 20:18:27,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2678, Invalid=24382, Unknown=0, NotChecked=0, Total=27060 [2021-12-06 20:18:27,315 INFO L87 Difference]: Start difference. First operand 1439 states and 1525 transitions. Second operand has 165 states, 165 states have (on average 2.0) internal successors, (330), 146 states have internal predecessors, (330), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-06 20:18:37,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:37,078 INFO L93 Difference]: Finished difference Result 2473 states and 2646 transitions. [2021-12-06 20:18:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 437 states. [2021-12-06 20:18:37,079 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 2.0) internal successors, (330), 146 states have internal predecessors, (330), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) Word has length 1433 [2021-12-06 20:18:37,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:37,083 INFO L225 Difference]: With dead ends: 2473 [2021-12-06 20:18:37,083 INFO L226 Difference]: Without dead ends: 1499 [2021-12-06 20:18:37,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3416 GetRequests, 2858 SyntacticMatches, 0 SemanticMatches, 558 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122919 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=54983, Invalid=258057, Unknown=0, NotChecked=0, Total=313040 [2021-12-06 20:18:37,103 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3602 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 1044 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3602 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1044 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:37,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3602 Valid, 345 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1044 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:18:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2021-12-06 20:18:37,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1499. [2021-12-06 20:18:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1467 states have (on average 1.0572597137014315) internal successors, (1551), 1467 states have internal predecessors, (1551), 3 states have call successors, (3), 2 states have call predecessors, (3), 28 states have return successors, (29), 29 states have call predecessors, (29), 2 states have call successors, (29) [2021-12-06 20:18:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 1583 transitions. [2021-12-06 20:18:37,261 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 1583 transitions. Word has length 1433 [2021-12-06 20:18:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:37,262 INFO L470 AbstractCegarLoop]: Abstraction has 1499 states and 1583 transitions. [2021-12-06 20:18:37,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 2.0) internal successors, (330), 146 states have internal predecessors, (330), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-06 20:18:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 1583 transitions. [2021-12-06 20:18:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1499 [2021-12-06 20:18:37,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:37,279 INFO L514 BasicCegarLoop]: trace histogram [395, 395, 395, 29, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2021-12-06 20:18:37,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-06 20:18:37,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-06 20:18:37,480 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:18:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:37,482 INFO L85 PathProgramCache]: Analyzing trace with hash 459547290, now seen corresponding path program 24 times [2021-12-06 20:18:37,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:37,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696311263] [2021-12-06 20:18:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:37,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:39,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:18:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:40,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:41,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:42,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:43,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:44,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:44,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:45,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:46,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:46,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:46,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:46,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:18:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 248692 backedges. 135611 proven. 1709 refuted. 0 times theorem prover too weak. 111372 trivial. 0 not checked. [2021-12-06 20:18:46,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:46,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696311263] [2021-12-06 20:18:46,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696311263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:18:46,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574076036] [2021-12-06 20:18:46,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:18:46,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:18:46,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:18:46,026 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:18:46,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 20:18:47,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-12-06 20:18:47,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:18:47,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 3322 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 20:18:47,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:18:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 248692 backedges. 114917 proven. 26548 refuted. 0 times theorem prover too weak. 107227 trivial. 0 not checked. [2021-12-06 20:18:49,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:18:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 248692 backedges. 114917 proven. 26548 refuted. 0 times theorem prover too weak. 107227 trivial. 0 not checked. [2021-12-06 20:18:56,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574076036] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:18:56,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:18:56,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 53, 53] total 185 [2021-12-06 20:18:56,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716902315] [2021-12-06 20:18:56,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:18:56,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2021-12-06 20:18:56,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:56,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2021-12-06 20:18:56,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3270, Invalid=30770, Unknown=0, NotChecked=0, Total=34040 [2021-12-06 20:18:56,293 INFO L87 Difference]: Start difference. First operand 1499 states and 1583 transitions. Second operand has 185 states, 185 states have (on average 1.7837837837837838) internal successors, (330), 176 states have internal predecessors, (330), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-06 20:19:24,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:19:24,343 INFO L93 Difference]: Finished difference Result 4591 states and 5100 transitions. [2021-12-06 20:19:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 664 states. [2021-12-06 20:19:24,344 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 1.7837837837837838) internal successors, (330), 176 states have internal predecessors, (330), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 1498 [2021-12-06 20:19:24,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:19:24,353 INFO L225 Difference]: With dead ends: 4591 [2021-12-06 20:19:24,353 INFO L226 Difference]: Without dead ends: 3275 [2021-12-06 20:19:24,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3795 GetRequests, 2953 SyntacticMatches, 0 SemanticMatches, 842 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258967 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=69289, Invalid=642203, Unknown=0, NotChecked=0, Total=711492 [2021-12-06 20:19:24,386 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 6930 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 6179 mSolverCounterSat, 1467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6930 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 7646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1467 IncrementalHoareTripleChecker+Valid, 6179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:19:24,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6930 Valid, 1925 Invalid, 7646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1467 Valid, 6179 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 20:19:24,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2021-12-06 20:19:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 1739. [2021-12-06 20:19:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1739 states, 1706 states have (on average 1.0697538100820634) internal successors, (1825), 1706 states have internal predecessors, (1825), 3 states have call successors, (3), 2 states have call predecessors, (3), 29 states have return successors, (30), 30 states have call predecessors, (30), 2 states have call successors, (30) [2021-12-06 20:19:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 1858 transitions. [2021-12-06 20:19:24,659 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 1858 transitions. Word has length 1498 [2021-12-06 20:19:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:19:24,660 INFO L470 AbstractCegarLoop]: Abstraction has 1739 states and 1858 transitions. [2021-12-06 20:19:24,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 1.7837837837837838) internal successors, (330), 176 states have internal predecessors, (330), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-06 20:19:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 1858 transitions. [2021-12-06 20:19:24,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1676 [2021-12-06 20:19:24,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:19:24,680 INFO L514 BasicCegarLoop]: trace histogram [454, 454, 454, 29, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2021-12-06 20:19:24,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 20:19:24,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:19:24,882 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:19:24,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:19:24,884 INFO L85 PathProgramCache]: Analyzing trace with hash -673594769, now seen corresponding path program 25 times [2021-12-06 20:19:24,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:19:24,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707084501] [2021-12-06 20:19:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:19:24,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:19:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:27,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:19:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:28,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:30,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:31,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:32,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:32,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:33,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:33,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:34,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:35,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:35,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:35,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:36,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:36,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:36,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:36,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:36,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:36,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:36,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:37,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:37,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:37,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:37,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:37,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:37,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:37,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:37,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:37,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:19:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 325392 backedges. 158775 proven. 55157 refuted. 0 times theorem prover too weak. 111460 trivial. 0 not checked. [2021-12-06 20:19:37,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:19:37,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707084501] [2021-12-06 20:19:37,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707084501] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:19:37,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442942194] [2021-12-06 20:19:37,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:19:37,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:19:37,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:19:37,637 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:19:37,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 20:19:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:39,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 3835 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-06 20:19:39,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:19:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 325392 backedges. 158832 proven. 55100 refuted. 0 times theorem prover too weak. 111460 trivial. 0 not checked. [2021-12-06 20:19:40,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:20:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 325392 backedges. 158832 proven. 55100 refuted. 0 times theorem prover too weak. 111460 trivial. 0 not checked. [2021-12-06 20:20:30,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442942194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:20:30,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:20:30,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 103 [2021-12-06 20:20:30,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334256375] [2021-12-06 20:20:30,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:20:30,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-12-06 20:20:30,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:20:30,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-12-06 20:20:30,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1137, Invalid=9369, Unknown=0, NotChecked=0, Total=10506 [2021-12-06 20:20:30,556 INFO L87 Difference]: Start difference. First operand 1739 states and 1858 transitions. Second operand has 103 states, 103 states have (on average 2.2718446601941746) internal successors, (234), 83 states have internal predecessors, (234), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-06 20:20:35,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:20:35,812 INFO L93 Difference]: Finished difference Result 2896 states and 3134 transitions. [2021-12-06 20:20:35,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 444 states. [2021-12-06 20:20:35,812 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.2718446601941746) internal successors, (234), 83 states have internal predecessors, (234), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) Word has length 1675 [2021-12-06 20:20:35,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:20:35,818 INFO L225 Difference]: With dead ends: 2896 [2021-12-06 20:20:35,818 INFO L226 Difference]: Without dead ends: 1922 [2021-12-06 20:20:35,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3931 GetRequests, 3430 SyntacticMatches, 0 SemanticMatches, 501 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133845 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=49331, Invalid=203175, Unknown=0, NotChecked=0, Total=252506 [2021-12-06 20:20:35,830 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 922 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:20:35,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 308 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:20:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-12-06 20:20:36,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1862. [2021-12-06 20:20:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1827 states have (on average 1.066776135741653) internal successors, (1949), 1827 states have internal predecessors, (1949), 3 states have call successors, (3), 2 states have call predecessors, (3), 31 states have return successors, (32), 32 states have call predecessors, (32), 2 states have call successors, (32) [2021-12-06 20:20:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 1984 transitions. [2021-12-06 20:20:36,105 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 1984 transitions. Word has length 1675 [2021-12-06 20:20:36,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:20:36,105 INFO L470 AbstractCegarLoop]: Abstraction has 1862 states and 1984 transitions. [2021-12-06 20:20:36,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.2718446601941746) internal successors, (234), 83 states have internal predecessors, (234), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-06 20:20:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 1984 transitions. [2021-12-06 20:20:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1738 [2021-12-06 20:20:36,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:20:36,128 INFO L514 BasicCegarLoop]: trace histogram [471, 471, 471, 30, 29, 29, 29, 29, 29, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2021-12-06 20:20:36,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 20:20:36,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:20:36,329 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:20:36,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:20:36,331 INFO L85 PathProgramCache]: Analyzing trace with hash -374024045, now seen corresponding path program 26 times [2021-12-06 20:20:36,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:20:36,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116323379] [2021-12-06 20:20:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:36,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:20:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:38,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:20:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:40,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:41,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:42,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:43,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:44,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:45,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:46,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:46,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:47,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:47,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:48,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:48,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:48,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:48,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:49,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:49,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:49,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:49,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:49,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:49,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:49,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:49,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:49,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:49,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:49,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:49,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:50,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:50,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:20:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 350210 backedges. 197818 proven. 8963 refuted. 0 times theorem prover too weak. 143429 trivial. 0 not checked. [2021-12-06 20:20:50,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:20:50,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116323379] [2021-12-06 20:20:50,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116323379] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:20:50,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135109780] [2021-12-06 20:20:50,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:20:50,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:20:50,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:20:50,148 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:20:50,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 20:20:52,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:20:52,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:20:52,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 3977 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-06 20:20:52,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:20:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 350210 backedges. 197923 proven. 8856 refuted. 0 times theorem prover too weak. 143431 trivial. 0 not checked. [2021-12-06 20:20:53,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:21:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 350210 backedges. 198092 proven. 8687 refuted. 0 times theorem prover too weak. 143431 trivial. 0 not checked. [2021-12-06 20:21:39,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135109780] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:21:39,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:21:39,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 89, 89] total 95 [2021-12-06 20:21:39,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687780095] [2021-12-06 20:21:39,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:21:39,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-06 20:21:39,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:21:39,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-06 20:21:39,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=936, Invalid=7994, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 20:21:39,804 INFO L87 Difference]: Start difference. First operand 1862 states and 1984 transitions. Second operand has 95 states, 95 states have (on average 2.336842105263158) internal successors, (222), 76 states have internal predecessors, (222), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-06 20:21:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:21:48,078 INFO L93 Difference]: Finished difference Result 2962 states and 3201 transitions. [2021-12-06 20:21:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 368 states. [2021-12-06 20:21:48,079 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.336842105263158) internal successors, (222), 76 states have internal predecessors, (222), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) Word has length 1737 [2021-12-06 20:21:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:21:48,084 INFO L225 Difference]: With dead ends: 2962 [2021-12-06 20:21:48,084 INFO L226 Difference]: Without dead ends: 1802 [2021-12-06 20:21:48,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3964 GetRequests, 3540 SyntacticMatches, 2 SemanticMatches, 422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53339 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=32045, Invalid=147307, Unknown=0, NotChecked=0, Total=179352 [2021-12-06 20:21:48,095 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 132 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 2889 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:21:48,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1264 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2889 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:21:48,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-12-06 20:21:48,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1802. [2021-12-06 20:21:48,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1768 states have (on average 1.0667420814479638) internal successors, (1886), 1768 states have internal predecessors, (1886), 3 states have call successors, (3), 2 states have call predecessors, (3), 30 states have return successors, (31), 31 states have call predecessors, (31), 2 states have call successors, (31) [2021-12-06 20:21:48,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 1920 transitions. [2021-12-06 20:21:48,365 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 1920 transitions. Word has length 1737 [2021-12-06 20:21:48,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:21:48,366 INFO L470 AbstractCegarLoop]: Abstraction has 1802 states and 1920 transitions. [2021-12-06 20:21:48,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.336842105263158) internal successors, (222), 76 states have internal predecessors, (222), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-06 20:21:48,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 1920 transitions. [2021-12-06 20:21:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1751 [2021-12-06 20:21:48,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:21:48,388 INFO L514 BasicCegarLoop]: trace histogram [472, 472, 472, 32, 31, 31, 31, 31, 29, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2021-12-06 20:21:48,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 20:21:48,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:21:48,590 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:21:48,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:21:48,592 INFO L85 PathProgramCache]: Analyzing trace with hash 263881110, now seen corresponding path program 27 times [2021-12-06 20:21:48,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:21:48,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140198593] [2021-12-06 20:21:48,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:21:48,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:21:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:21:50,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 20:21:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:21:52,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:21:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:21:53,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:21:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:21:55,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:21:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:21:56,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:21:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:21:57,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:21:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:21:57,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:21:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:21:58,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:21:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:21:58,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:21:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:21:59,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:21:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:00,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:00,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:00,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:00,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:01,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:01,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:01,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:01,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:01,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:01,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:01,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:02,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:02,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:02,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:02,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:02,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:02,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:02,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:02,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:22:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 351951 backedges. 213480 proven. 10525 refuted. 0 times theorem prover too weak. 127946 trivial. 0 not checked. [2021-12-06 20:22:02,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:22:02,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140198593] [2021-12-06 20:22:02,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140198593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:22:02,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12561334] [2021-12-06 20:22:02,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:22:02,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:22:02,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:22:02,641 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:22:02,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 20:22:05,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-12-06 20:22:05,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:22:05,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 2200 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 20:22:05,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:22:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 351951 backedges. 173955 proven. 63377 refuted. 0 times theorem prover too weak. 114619 trivial. 0 not checked. [2021-12-06 20:22:07,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:22:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 351951 backedges. 173955 proven. 63377 refuted. 0 times theorem prover too weak. 114619 trivial. 0 not checked. [2021-12-06 20:22:17,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12561334] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:22:17,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:22:17,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 58, 58] total 212 [2021-12-06 20:22:17,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14313497] [2021-12-06 20:22:17,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:22:17,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2021-12-06 20:22:17,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:22:17,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2021-12-06 20:22:17,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3758, Invalid=40974, Unknown=0, NotChecked=0, Total=44732 [2021-12-06 20:22:17,054 INFO L87 Difference]: Start difference. First operand 1802 states and 1920 transitions. Second operand has 212 states, 212 states have (on average 2.0660377358490565) internal successors, (438), 182 states have internal predecessors, (438), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2021-12-06 20:23:36,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:23:36,761 INFO L93 Difference]: Finished difference Result 7729 states and 8619 transitions. [2021-12-06 20:23:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1164 states. [2021-12-06 20:23:36,762 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.0660377358490565) internal successors, (438), 182 states have internal predecessors, (438), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) Word has length 1750 [2021-12-06 20:23:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:23:36,773 INFO L225 Difference]: With dead ends: 7729 [2021-12-06 20:23:36,773 INFO L226 Difference]: Without dead ends: 5837 [2021-12-06 20:23:36,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4821 GetRequests, 3453 SyntacticMatches, 0 SemanticMatches, 1368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778864 ImplicationChecksByTransitivity, 77.7s TimeCoverageRelationStatistics Valid=278504, Invalid=1597026, Unknown=0, NotChecked=0, Total=1875530 [2021-12-06 20:23:36,874 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 4731 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 5949 mSolverCounterSat, 2019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4731 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 7968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2019 IncrementalHoareTripleChecker+Valid, 5949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:23:36,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4731 Valid, 1414 Invalid, 7968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2019 Valid, 5949 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 20:23:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5837 states. [2021-12-06 20:23:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5837 to 1967. [2021-12-06 20:23:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1932 states have (on average 1.0771221532091098) internal successors, (2081), 1932 states have internal predecessors, (2081), 3 states have call successors, (3), 2 states have call predecessors, (3), 31 states have return successors, (32), 32 states have call predecessors, (32), 2 states have call successors, (32) [2021-12-06 20:23:37,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 2116 transitions. [2021-12-06 20:23:37,308 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 2116 transitions. Word has length 1750 [2021-12-06 20:23:37,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:23:37,309 INFO L470 AbstractCegarLoop]: Abstraction has 1967 states and 2116 transitions. [2021-12-06 20:23:37,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.0660377358490565) internal successors, (438), 182 states have internal predecessors, (438), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2021-12-06 20:23:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 2116 transitions. [2021-12-06 20:23:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1982 [2021-12-06 20:23:37,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:23:37,337 INFO L514 BasicCegarLoop]: trace histogram [545, 545, 545, 32, 31, 31, 31, 31, 31, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2021-12-06 20:23:37,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 20:23:37,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 20:23:37,538 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-06 20:23:37,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:23:37,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1809986749, now seen corresponding path program 28 times [2021-12-06 20:23:37,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:23:37,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155127321] [2021-12-06 20:23:37,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:23:37,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:23:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:40,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 20:23:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:42,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:44,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:46,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:47,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:48,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:49,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:50,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:51,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:52,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:52,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:53,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:53,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:54,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:54,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:54,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:54,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:55,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:55,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:55,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:55,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:55,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:55,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:55,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:55,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:55,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:55,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:56,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:56,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:56,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:56,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:23:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:23:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 466762 backedges. 222035 proven. 67265 refuted. 0 times theorem prover too weak. 177462 trivial. 0 not checked. [2021-12-06 20:23:56,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:23:56,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155127321] [2021-12-06 20:23:56,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155127321] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:23:56,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218212392] [2021-12-06 20:23:56,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:23:56,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:23:56,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:23:56,320 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:23:56,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86cf937-7ef1-4b5b-967e-1f978a2d4514/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 20:23:58,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:23:58,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:23:58,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 4541 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-06 20:23:58,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 466762 backedges. 222095 proven. 67205 refuted. 0 times theorem prover too weak. 177462 trivial. 0 not checked. [2021-12-06 20:24:00,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:25:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 466762 backedges. 222095 proven. 67205 refuted. 0 times theorem prover too weak. 177462 trivial. 0 not checked. [2021-12-06 20:25:08,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218212392] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:25:08,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:25:08,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104, 104] total 108 [2021-12-06 20:25:08,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760594321] [2021-12-06 20:25:08,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:25:08,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-12-06 20:25:08,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:25:08,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-12-06 20:25:08,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1246, Invalid=10310, Unknown=0, NotChecked=0, Total=11556 [2021-12-06 20:25:08,142 INFO L87 Difference]: Start difference. First operand 1967 states and 2116 transitions. Second operand has 108 states, 108 states have (on average 2.2685185185185186) internal successors, (245), 87 states have internal predecessors, (245), 1 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (23), 23 states have call predecessors, (23), 1 states have call successors, (23)