./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2409cd2f018515417b0b6bf5d396e4bc80c02540769112137ebf388167bdf776 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:51:53,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:51:53,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:51:53,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:51:53,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:51:53,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:51:53,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:51:53,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:51:53,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:51:53,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:51:53,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:51:53,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:51:53,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:51:53,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:51:53,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:51:53,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:51:53,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:51:53,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:51:53,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:51:53,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:51:53,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:51:53,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:51:53,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:51:53,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:51:53,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:51:53,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:51:53,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:51:53,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:51:53,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:51:53,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:51:53,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:51:53,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:51:53,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:51:53,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:51:53,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:51:53,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:51:53,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:51:53,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:51:53,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:51:53,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:51:53,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:51:53,651 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:51:53,682 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:51:53,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:51:53,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:51:53,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:51:53,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:51:53,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:51:53,686 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:51:53,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:51:53,686 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:51:53,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:51:53,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:51:53,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:51:53,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:51:53,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:51:53,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:51:53,688 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:51:53,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:51:53,689 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:51:53,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:51:53,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:51:53,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:51:53,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:51:53,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:51:53,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:51:53,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:51:53,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:51:53,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:51:53,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:51:53,693 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:51:53,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:51:53,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:51:53,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:51:53,694 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_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2409cd2f018515417b0b6bf5d396e4bc80c02540769112137ebf388167bdf776 [2021-10-28 09:51:54,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:51:54,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:51:54,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:51:54,039 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:51:54,040 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:51:54,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2021-10-28 09:51:54,139 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/data/d533d9788/40a86733a9c243cf8304fb02736f1419/FLAG827ee5dca [2021-10-28 09:51:54,680 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:51:54,683 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2021-10-28 09:51:54,697 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/data/d533d9788/40a86733a9c243cf8304fb02736f1419/FLAG827ee5dca [2021-10-28 09:51:55,047 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/data/d533d9788/40a86733a9c243cf8304fb02736f1419 [2021-10-28 09:51:55,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:51:55,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:51:55,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:51:55,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:51:55,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:51:55,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:51:55" (1/1) ... [2021-10-28 09:51:55,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c6a3db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:51:55, skipping insertion in model container [2021-10-28 09:51:55,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:51:55" (1/1) ... [2021-10-28 09:51:55,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:51:55,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:51:55,356 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2021-10-28 09:51:55,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:51:55,372 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:51:55,389 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2021-10-28 09:51:55,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:51:55,407 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:51:55,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:51:55 WrapperNode [2021-10-28 09:51:55,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:51:55,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:51:55,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:51:55,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:51:55,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:51:55" (1/1) ... [2021-10-28 09:51:55,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:51:55" (1/1) ... [2021-10-28 09:51:55,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:51:55,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:51:55,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:51:55,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:51:55,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:51:55" (1/1) ... [2021-10-28 09:51:55,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:51:55" (1/1) ... [2021-10-28 09:51:55,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:51:55" (1/1) ... [2021-10-28 09:51:55,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:51:55" (1/1) ... [2021-10-28 09:51:55,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:51:55" (1/1) ... [2021-10-28 09:51:55,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:51:55" (1/1) ... [2021-10-28 09:51:55,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:51:55" (1/1) ... [2021-10-28 09:51:55,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:51:55,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:51:55,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:51:55,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:51:55,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:51:55" (1/1) ... [2021-10-28 09:51:55,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:51:55,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:51:55,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:51:55,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:51:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:51:55,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:51:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:51:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-10-28 09:51:55,579 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-10-28 09:51:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:51:55,789 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:51:55,789 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 09:51:55,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:51:55 BoogieIcfgContainer [2021-10-28 09:51:55,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:51:55,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:51:55,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:51:55,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:51:55,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:51:55" (1/3) ... [2021-10-28 09:51:55,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ff5bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:51:55, skipping insertion in model container [2021-10-28 09:51:55,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:51:55" (2/3) ... [2021-10-28 09:51:55,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ff5bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:51:55, skipping insertion in model container [2021-10-28 09:51:55,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:51:55" (3/3) ... [2021-10-28 09:51:55,821 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2021-10-28 09:51:55,844 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:51:55,844 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:51:55,905 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:51:55,913 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:51:55,914 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:51:55,934 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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) [2021-10-28 09:51:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:51:55,941 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:51:55,941 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:51:55,942 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:51:55,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:51:55,967 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-10-28 09:51:55,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:51:55,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526169367] [2021-10-28 09:51:55,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:51:55,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:51:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:56,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:51:56,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:51:56,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526169367] [2021-10-28 09:51:56,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526169367] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:51:56,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:51:56,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:51:56,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976755019] [2021-10-28 09:51:56,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:51:56,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:51:56,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:51:56,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:51:56,460 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:51:56,563 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-28 09:51:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:51:56,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 09:51:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:51:56,573 INFO L225 Difference]: With dead ends: 25 [2021-10-28 09:51:56,574 INFO L226 Difference]: Without dead ends: 15 [2021-10-28 09:51:56,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:51:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-28 09:51:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-28 09:51:56,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 09:51:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-28 09:51:56,624 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-10-28 09:51:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:51:56,625 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-28 09:51:56,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-28 09:51:56,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:51:56,627 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:51:56,628 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:51:56,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:51:56,629 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:51:56,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:51:56,630 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-10-28 09:51:56,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:51:56,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164671304] [2021-10-28 09:51:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:51:56,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:51:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:56,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:56,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:51:56,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:51:56,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164671304] [2021-10-28 09:51:56,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164671304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:56,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355554621] [2021-10-28 09:51:56,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:51:56,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:56,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:51:56,824 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:51:56,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:51:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:56,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:51:56,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:51:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:51:57,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355554621] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:57,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:51:57,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-28 09:51:57,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67113944] [2021-10-28 09:51:57,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:51:57,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:51:57,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:51:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:51:57,090 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 09:51:57,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:51:57,148 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-10-28 09:51:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:51:57,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 16 [2021-10-28 09:51:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:51:57,151 INFO L225 Difference]: With dead ends: 22 [2021-10-28 09:51:57,152 INFO L226 Difference]: Without dead ends: 18 [2021-10-28 09:51:57,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:51:57,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-28 09:51:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-28 09:51:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 09:51:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-28 09:51:57,161 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-10-28 09:51:57,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:51:57,162 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-28 09:51:57,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 09:51:57,163 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-28 09:51:57,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 09:51:57,164 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:51:57,165 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:51:57,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:51:57,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:57,374 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:51:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:51:57,375 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-10-28 09:51:57,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:51:57,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318033620] [2021-10-28 09:51:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:51:57,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:51:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:57,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:57,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:57,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 09:51:57,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:51:57,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318033620] [2021-10-28 09:51:57,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318033620] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:57,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332221220] [2021-10-28 09:51:57,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:51:57,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:57,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:51:57,584 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:51:57,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:51:57,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:51:57,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:51:57,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:51:57,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:51:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 09:51:57,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332221220] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:57,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:51:57,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-28 09:51:57,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995941162] [2021-10-28 09:51:57,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:51:57,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:51:57,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:51:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:51:57,818 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 09:51:57,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:51:57,982 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-28 09:51:57,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:51:57,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 22 [2021-10-28 09:51:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:51:57,987 INFO L225 Difference]: With dead ends: 25 [2021-10-28 09:51:57,987 INFO L226 Difference]: Without dead ends: 21 [2021-10-28 09:51:57,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:51:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-28 09:51:57,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-28 09:51:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 09:51:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-28 09:51:58,012 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-10-28 09:51:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:51:58,012 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-28 09:51:58,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 09:51:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-10-28 09:51:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 09:51:58,017 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:51:58,017 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:51:58,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:51:58,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:58,218 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:51:58,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:51:58,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-10-28 09:51:58,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:51:58,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372325088] [2021-10-28 09:51:58,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:51:58,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:51:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:58,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:58,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:58,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:58,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:51:58,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:51:58,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372325088] [2021-10-28 09:51:58,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372325088] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:58,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953436757] [2021-10-28 09:51:58,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:51:58,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:58,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:51:58,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:51:58,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:51:58,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 09:51:58,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:51:58,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:51:58,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:51:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:51:58,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953436757] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:58,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:51:58,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-28 09:51:58,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195147723] [2021-10-28 09:51:58,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:51:58,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:51:58,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:51:58,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:51:58,769 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 09:51:58,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:51:58,854 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-28 09:51:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:51:58,855 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 28 [2021-10-28 09:51:58,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:51:58,860 INFO L225 Difference]: With dead ends: 28 [2021-10-28 09:51:58,860 INFO L226 Difference]: Without dead ends: 24 [2021-10-28 09:51:58,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:51:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-28 09:51:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 09:51:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 09:51:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-28 09:51:58,883 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-10-28 09:51:58,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:51:58,884 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-28 09:51:58,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 09:51:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-28 09:51:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:51:58,890 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:51:58,895 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:51:58,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:51:59,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:59,096 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:51:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:51:59,096 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-10-28 09:51:59,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:51:59,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783716896] [2021-10-28 09:51:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:51:59,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:51:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:59,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:59,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:59,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:59,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:59,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:51:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 09:51:59,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:51:59,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783716896] [2021-10-28 09:51:59,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783716896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:59,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986753621] [2021-10-28 09:51:59,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:51:59,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:59,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:51:59,351 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:51:59,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:51:59,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:51:59,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:51:59,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:51:59,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:51:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 09:51:59,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986753621] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:59,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:51:59,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-10-28 09:51:59,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248913964] [2021-10-28 09:51:59,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:51:59,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:51:59,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:51:59,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:51:59,667 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 09:51:59,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:51:59,750 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-28 09:51:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:51:59,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 34 [2021-10-28 09:51:59,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:51:59,758 INFO L225 Difference]: With dead ends: 31 [2021-10-28 09:51:59,758 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 09:51:59,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:51:59,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 09:51:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 09:51:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 09:51:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-28 09:51:59,770 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-10-28 09:51:59,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:51:59,770 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-28 09:51:59,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 09:51:59,771 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-28 09:51:59,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 09:51:59,773 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:51:59,773 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:51:59,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:51:59,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:59,979 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:51:59,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:51:59,980 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-10-28 09:51:59,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:51:59,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618697031] [2021-10-28 09:51:59,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:51:59,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:51:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:00,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:00,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:00,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:00,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:00,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:00,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 09:52:00,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:00,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618697031] [2021-10-28 09:52:00,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618697031] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:00,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114634997] [2021-10-28 09:52:00,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:52:00,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:00,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:00,179 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:00,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:52:00,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 09:52:00,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:00,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:52:00,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 09:52:00,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114634997] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:00,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:00,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-28 09:52:00,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311063563] [2021-10-28 09:52:00,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:52:00,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:52:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:52:00,472 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-10-28 09:52:00,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:00,574 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-28 09:52:00,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:52:00,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 40 [2021-10-28 09:52:00,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:00,577 INFO L225 Difference]: With dead ends: 34 [2021-10-28 09:52:00,578 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 09:52:00,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:52:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 09:52:00,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-28 09:52:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-10-28 09:52:00,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-28 09:52:00,593 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-10-28 09:52:00,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:00,596 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-28 09:52:00,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-10-28 09:52:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-28 09:52:00,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 09:52:00,602 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:00,602 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:00,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:00,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:00,823 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:00,824 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-10-28 09:52:00,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:00,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638442079] [2021-10-28 09:52:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:00,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:00,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:00,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:00,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:01,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:01,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:01,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:01,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-28 09:52:01,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:01,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638442079] [2021-10-28 09:52:01,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638442079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:01,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857909121] [2021-10-28 09:52:01,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:52:01,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:01,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:01,108 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:01,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:52:01,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 09:52:01,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:01,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 09:52:01,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-28 09:52:01,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857909121] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:01,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:01,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-10-28 09:52:01,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831773118] [2021-10-28 09:52:01,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:52:01,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:01,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:52:01,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:52:01,521 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2021-10-28 09:52:01,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:01,620 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-10-28 09:52:01,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:52:01,621 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) Word has length 46 [2021-10-28 09:52:01,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:01,627 INFO L225 Difference]: With dead ends: 37 [2021-10-28 09:52:01,627 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 09:52:01,628 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:52:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 09:52:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-28 09:52:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-10-28 09:52:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-10-28 09:52:01,640 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-10-28 09:52:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:01,640 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-10-28 09:52:01,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2021-10-28 09:52:01,641 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-10-28 09:52:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 09:52:01,643 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:01,643 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:01,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:01,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 09:52:01,847 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-10-28 09:52:01,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:01,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417888938] [2021-10-28 09:52:01,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:01,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:01,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:01,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:01,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:01,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:02,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:02,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:02,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:02,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-28 09:52:02,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:02,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417888938] [2021-10-28 09:52:02,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417888938] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:02,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235052050] [2021-10-28 09:52:02,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:52:02,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:02,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:02,123 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:02,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:52:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:02,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:52:02,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-28 09:52:02,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235052050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:02,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:02,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-10-28 09:52:02,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709023079] [2021-10-28 09:52:02,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 09:52:02,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:02,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 09:52:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:52:02,523 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-10-28 09:52:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:02,644 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-28 09:52:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:52:02,645 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) Word has length 52 [2021-10-28 09:52:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:02,647 INFO L225 Difference]: With dead ends: 40 [2021-10-28 09:52:02,647 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 09:52:02,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:52:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 09:52:02,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-28 09:52:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-10-28 09:52:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-10-28 09:52:02,654 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-10-28 09:52:02,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:02,654 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-10-28 09:52:02,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-10-28 09:52:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-10-28 09:52:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 09:52:02,657 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:02,657 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:02,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:02,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:02,879 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:02,880 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-10-28 09:52:02,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:02,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522661760] [2021-10-28 09:52:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:02,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:02,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:02,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:02,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:03,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:03,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:03,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:03,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:03,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:03,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 09:52:03,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:03,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522661760] [2021-10-28 09:52:03,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522661760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:03,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289208394] [2021-10-28 09:52:03,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:52:03,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:03,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:03,129 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:03,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:52:03,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:52:03,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:03,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:52:03,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 09:52:03,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289208394] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:03,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:03,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-10-28 09:52:03,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486381731] [2021-10-28 09:52:03,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 09:52:03,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:03,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:52:03,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:52:03,607 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-10-28 09:52:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:03,725 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-10-28 09:52:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:52:03,726 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) Word has length 58 [2021-10-28 09:52:03,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:03,727 INFO L225 Difference]: With dead ends: 43 [2021-10-28 09:52:03,727 INFO L226 Difference]: Without dead ends: 39 [2021-10-28 09:52:03,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:52:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-28 09:52:03,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-28 09:52:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-10-28 09:52:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-10-28 09:52:03,735 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-10-28 09:52:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:03,735 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-10-28 09:52:03,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-10-28 09:52:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-10-28 09:52:03,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 09:52:03,737 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:03,737 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:03,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:03,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:03,963 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:03,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:03,964 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-10-28 09:52:03,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:03,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263970672] [2021-10-28 09:52:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:03,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:04,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:04,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:04,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:04,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:04,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:04,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:04,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:04,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:04,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:04,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-28 09:52:04,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:04,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263970672] [2021-10-28 09:52:04,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263970672] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:04,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621095407] [2021-10-28 09:52:04,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:52:04,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:04,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:04,299 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:04,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:52:04,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 09:52:04,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:04,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 09:52:04,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-28 09:52:04,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621095407] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:04,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:04,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-10-28 09:52:04,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400620375] [2021-10-28 09:52:04,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 09:52:04,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:04,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 09:52:04,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:52:04,727 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) [2021-10-28 09:52:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:04,849 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-10-28 09:52:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:52:04,850 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) Word has length 64 [2021-10-28 09:52:04,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:04,858 INFO L225 Difference]: With dead ends: 46 [2021-10-28 09:52:04,858 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 09:52:04,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:52:04,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 09:52:04,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-28 09:52:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-10-28 09:52:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-10-28 09:52:04,879 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-10-28 09:52:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:04,879 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-10-28 09:52:04,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) [2021-10-28 09:52:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-10-28 09:52:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 09:52:04,884 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:04,885 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:04,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:05,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:05,086 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-10-28 09:52:05,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:05,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376592713] [2021-10-28 09:52:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:05,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:05,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:05,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:05,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:05,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:05,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:05,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:05,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:05,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:05,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:05,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:05,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-28 09:52:05,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:05,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376592713] [2021-10-28 09:52:05,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376592713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:05,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711467239] [2021-10-28 09:52:05,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:52:05,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:05,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:05,452 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:05,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:52:05,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:52:05,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:05,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 09:52:05,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-28 09:52:06,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711467239] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:06,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:06,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-10-28 09:52:06,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600277668] [2021-10-28 09:52:06,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 09:52:06,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:06,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 09:52:06,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:52:06,039 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-10-28 09:52:06,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:06,223 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-10-28 09:52:06,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:52:06,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) Word has length 70 [2021-10-28 09:52:06,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:06,226 INFO L225 Difference]: With dead ends: 49 [2021-10-28 09:52:06,226 INFO L226 Difference]: Without dead ends: 45 [2021-10-28 09:52:06,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:52:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-28 09:52:06,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-28 09:52:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-10-28 09:52:06,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-10-28 09:52:06,245 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-10-28 09:52:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:06,246 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-10-28 09:52:06,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-10-28 09:52:06,247 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-10-28 09:52:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-28 09:52:06,254 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:06,254 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:06,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:06,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:06,472 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:06,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:06,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-10-28 09:52:06,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:06,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726654820] [2021-10-28 09:52:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:06,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:06,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:06,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:06,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:06,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:06,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:06,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:06,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:06,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:06,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:06,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:06,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:06,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-10-28 09:52:06,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:06,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726654820] [2021-10-28 09:52:06,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726654820] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:06,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003183358] [2021-10-28 09:52:06,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:52:06,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:06,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:06,835 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:06,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:52:07,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-28 09:52:07,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:07,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 09:52:07,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-10-28 09:52:07,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003183358] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:07,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:07,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-10-28 09:52:07,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51857322] [2021-10-28 09:52:07,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 09:52:07,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:07,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 09:52:07,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:52:07,394 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-10-28 09:52:07,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:07,548 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-10-28 09:52:07,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:52:07,549 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) Word has length 76 [2021-10-28 09:52:07,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:07,550 INFO L225 Difference]: With dead ends: 52 [2021-10-28 09:52:07,550 INFO L226 Difference]: Without dead ends: 48 [2021-10-28 09:52:07,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2021-10-28 09:52:07,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-28 09:52:07,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-28 09:52:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-10-28 09:52:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-10-28 09:52:07,558 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-10-28 09:52:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:07,559 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-10-28 09:52:07,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-10-28 09:52:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-10-28 09:52:07,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 09:52:07,561 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:07,561 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:07,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:07,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 09:52:07,783 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:07,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-10-28 09:52:07,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:07,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593587118] [2021-10-28 09:52:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:07,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:07,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:07,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:07,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:07,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:07,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:07,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:08,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:08,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:08,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:08,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:08,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:08,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:08,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-10-28 09:52:08,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:08,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593587118] [2021-10-28 09:52:08,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593587118] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:08,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762774406] [2021-10-28 09:52:08,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:52:08,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:08,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:08,210 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:08,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:52:08,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-28 09:52:08,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:08,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 09:52:08,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-10-28 09:52:08,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762774406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:08,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:08,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-10-28 09:52:08,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730916800] [2021-10-28 09:52:08,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 09:52:08,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:08,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 09:52:08,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:52:08,863 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-10-28 09:52:09,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:09,044 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-10-28 09:52:09,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:52:09,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) Word has length 82 [2021-10-28 09:52:09,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:09,046 INFO L225 Difference]: With dead ends: 55 [2021-10-28 09:52:09,047 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 09:52:09,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:52:09,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 09:52:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-28 09:52:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-10-28 09:52:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-10-28 09:52:09,054 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-10-28 09:52:09,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:09,055 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-10-28 09:52:09,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-10-28 09:52:09,056 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-10-28 09:52:09,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-28 09:52:09,057 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:09,057 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:09,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:09,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 09:52:09,276 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:09,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:09,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-10-28 09:52:09,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:09,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316083858] [2021-10-28 09:52:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:09,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-28 09:52:09,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:09,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316083858] [2021-10-28 09:52:09,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316083858] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:09,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679666397] [2021-10-28 09:52:09,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:52:09,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:09,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:09,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:09,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:52:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:10,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 09:52:10,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-28 09:52:10,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679666397] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:10,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:10,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-10-28 09:52:10,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385229489] [2021-10-28 09:52:10,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 09:52:10,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:10,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 09:52:10,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:52:10,481 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-10-28 09:52:10,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:10,671 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-10-28 09:52:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:52:10,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) Word has length 88 [2021-10-28 09:52:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:10,673 INFO L225 Difference]: With dead ends: 58 [2021-10-28 09:52:10,673 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 09:52:10,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 09:52:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 09:52:10,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-28 09:52:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-10-28 09:52:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-10-28 09:52:10,680 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-10-28 09:52:10,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:10,681 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-10-28 09:52:10,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-10-28 09:52:10,681 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-10-28 09:52:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-28 09:52:10,683 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:10,683 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:10,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:10,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 09:52:10,899 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:10,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:10,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-10-28 09:52:10,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:10,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782250829] [2021-10-28 09:52:10,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:10,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:10,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:10,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:11,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:11,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:11,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:11,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:11,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:11,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:11,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:11,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:11,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:11,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:11,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:11,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:11,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-10-28 09:52:11,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:11,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782250829] [2021-10-28 09:52:11,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782250829] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:11,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326118886] [2021-10-28 09:52:11,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:52:11,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:11,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:11,394 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:11,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:52:11,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:52:11,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:11,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 09:52:11,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-10-28 09:52:12,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326118886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:12,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:12,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-10-28 09:52:12,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333995104] [2021-10-28 09:52:12,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 09:52:12,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:12,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 09:52:12,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:52:12,152 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-10-28 09:52:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:12,365 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-10-28 09:52:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 09:52:12,366 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) Word has length 94 [2021-10-28 09:52:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:12,367 INFO L225 Difference]: With dead ends: 61 [2021-10-28 09:52:12,368 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 09:52:12,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 09:52:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 09:52:12,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-28 09:52:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-10-28 09:52:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-10-28 09:52:12,375 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-10-28 09:52:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:12,375 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-10-28 09:52:12,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-10-28 09:52:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-10-28 09:52:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-28 09:52:12,377 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:12,377 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:12,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:12,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:12,599 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:12,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:12,600 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-10-28 09:52:12,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:12,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734164178] [2021-10-28 09:52:12,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:12,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:12,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:12,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:12,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:12,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:12,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:12,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:12,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:12,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:12,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:12,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:12,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:13,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:13,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:13,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:13,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:13,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-10-28 09:52:13,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:13,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734164178] [2021-10-28 09:52:13,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734164178] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:13,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750542996] [2021-10-28 09:52:13,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:52:13,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:13,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:13,144 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:13,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:52:13,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-28 09:52:13,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:13,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 09:52:13,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-10-28 09:52:14,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750542996] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:14,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:14,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-10-28 09:52:14,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642913887] [2021-10-28 09:52:14,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 09:52:14,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:14,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 09:52:14,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:52:14,013 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) [2021-10-28 09:52:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:14,220 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-10-28 09:52:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 09:52:14,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) Word has length 100 [2021-10-28 09:52:14,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:14,222 INFO L225 Difference]: With dead ends: 64 [2021-10-28 09:52:14,223 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 09:52:14,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 09:52:14,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 09:52:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-28 09:52:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2021-10-28 09:52:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-10-28 09:52:14,229 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-10-28 09:52:14,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:14,229 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-10-28 09:52:14,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) [2021-10-28 09:52:14,230 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-10-28 09:52:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-28 09:52:14,231 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:14,231 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:14,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:14,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 09:52:14,432 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-10-28 09:52:14,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:14,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647847289] [2021-10-28 09:52:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:14,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-10-28 09:52:15,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:15,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647847289] [2021-10-28 09:52:15,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647847289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:15,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154891544] [2021-10-28 09:52:15,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:52:15,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:15,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:15,011 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:15,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:52:15,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:52:15,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:15,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 09:52:15,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-10-28 09:52:15,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154891544] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:15,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:15,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-10-28 09:52:15,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933312208] [2021-10-28 09:52:15,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 09:52:15,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:15,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 09:52:15,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:52:15,788 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) [2021-10-28 09:52:16,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:16,017 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-10-28 09:52:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 09:52:16,018 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) Word has length 106 [2021-10-28 09:52:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:16,019 INFO L225 Difference]: With dead ends: 67 [2021-10-28 09:52:16,023 INFO L226 Difference]: Without dead ends: 63 [2021-10-28 09:52:16,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 09:52:16,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-28 09:52:16,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-28 09:52:16,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-10-28 09:52:16,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-10-28 09:52:16,035 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-10-28 09:52:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:16,041 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-10-28 09:52:16,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) [2021-10-28 09:52:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-10-28 09:52:16,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-10-28 09:52:16,044 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:16,044 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:16,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:16,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 09:52:16,271 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:16,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:16,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-10-28 09:52:16,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:16,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780350950] [2021-10-28 09:52:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:16,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-10-28 09:52:16,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:16,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780350950] [2021-10-28 09:52:16,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780350950] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:16,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272891321] [2021-10-28 09:52:16,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:52:16,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:16,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:16,863 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:16,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:52:17,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-28 09:52:17,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:17,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 09:52:17,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-10-28 09:52:17,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272891321] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:17,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:17,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-10-28 09:52:17,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617957109] [2021-10-28 09:52:17,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 09:52:17,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:17,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 09:52:17,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:52:17,875 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) [2021-10-28 09:52:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:18,120 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-10-28 09:52:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 09:52:18,121 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) Word has length 112 [2021-10-28 09:52:18,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:18,122 INFO L225 Difference]: With dead ends: 70 [2021-10-28 09:52:18,123 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 09:52:18,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 09:52:18,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 09:52:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-28 09:52:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2021-10-28 09:52:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-10-28 09:52:18,129 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-10-28 09:52:18,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:18,129 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-10-28 09:52:18,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) [2021-10-28 09:52:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-10-28 09:52:18,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-28 09:52:18,132 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:18,132 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:18,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:18,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 09:52:18,351 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:18,351 INFO L85 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-10-28 09:52:18,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:18,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245344511] [2021-10-28 09:52:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:18,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:19,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-10-28 09:52:19,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:19,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245344511] [2021-10-28 09:52:19,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245344511] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:19,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825761958] [2021-10-28 09:52:19,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:52:19,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:19,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:19,051 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:19,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:52:19,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-28 09:52:19,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:19,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 09:52:19,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-10-28 09:52:20,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825761958] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:20,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:20,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-10-28 09:52:20,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803120115] [2021-10-28 09:52:20,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 09:52:20,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:20,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 09:52:20,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2021-10-28 09:52:20,184 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) [2021-10-28 09:52:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:20,473 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-10-28 09:52:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 09:52:20,474 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) Word has length 118 [2021-10-28 09:52:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:20,475 INFO L225 Difference]: With dead ends: 73 [2021-10-28 09:52:20,475 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 09:52:20,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 09:52:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 09:52:20,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-28 09:52:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-10-28 09:52:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-10-28 09:52:20,497 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-10-28 09:52:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:20,498 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-10-28 09:52:20,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) [2021-10-28 09:52:20,500 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-10-28 09:52:20,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-10-28 09:52:20,513 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:20,513 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:20,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:20,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:20,735 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:20,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:20,735 INFO L85 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-10-28 09:52:20,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:20,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248041277] [2021-10-28 09:52:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:20,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:20,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:20,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:20,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:20,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:20,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-10-28 09:52:21,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:21,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248041277] [2021-10-28 09:52:21,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248041277] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:21,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34768686] [2021-10-28 09:52:21,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:52:21,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:21,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:21,519 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:21,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:52:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:22,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 09:52:22,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-10-28 09:52:22,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34768686] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:22,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:22,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-10-28 09:52:22,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335468459] [2021-10-28 09:52:22,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 09:52:22,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:22,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 09:52:22,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:52:22,600 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) [2021-10-28 09:52:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:22,856 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-10-28 09:52:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 09:52:22,856 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) Word has length 124 [2021-10-28 09:52:22,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:22,858 INFO L225 Difference]: With dead ends: 76 [2021-10-28 09:52:22,858 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 09:52:22,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 09:52:22,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 09:52:22,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-28 09:52:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2021-10-28 09:52:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-10-28 09:52:22,865 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-10-28 09:52:22,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:22,866 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-10-28 09:52:22,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) [2021-10-28 09:52:22,867 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-10-28 09:52:22,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-10-28 09:52:22,868 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:22,868 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:22,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:23,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:23,095 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:23,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-10-28 09:52:23,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:23,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208069800] [2021-10-28 09:52:23,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:23,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-10-28 09:52:23,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:23,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208069800] [2021-10-28 09:52:23,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208069800] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:23,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109165231] [2021-10-28 09:52:23,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:52:23,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:23,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:23,911 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:23,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:52:24,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:52:24,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:24,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 09:52:24,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-10-28 09:52:25,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109165231] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:25,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:25,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-10-28 09:52:25,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308413418] [2021-10-28 09:52:25,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 09:52:25,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:25,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 09:52:25,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:52:25,114 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (41), 21 states have call predecessors, (41), 3 states have call successors, (41) [2021-10-28 09:52:25,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:25,414 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-10-28 09:52:25,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 09:52:25,415 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (41), 21 states have call predecessors, (41), 3 states have call successors, (41) Word has length 130 [2021-10-28 09:52:25,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:25,417 INFO L225 Difference]: With dead ends: 79 [2021-10-28 09:52:25,417 INFO L226 Difference]: Without dead ends: 75 [2021-10-28 09:52:25,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=809, Invalid=1447, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 09:52:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-28 09:52:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-28 09:52:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2021-10-28 09:52:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-10-28 09:52:25,430 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2021-10-28 09:52:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:25,431 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-10-28 09:52:25,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (41), 21 states have call predecessors, (41), 3 states have call successors, (41) [2021-10-28 09:52:25,432 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-10-28 09:52:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-10-28 09:52:25,434 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:25,434 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:25,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:25,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 09:52:25,651 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:25,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:25,652 INFO L85 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2021-10-28 09:52:25,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:25,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350001058] [2021-10-28 09:52:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:25,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:25,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:25,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:25,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:25,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:25,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:25,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-10-28 09:52:26,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:26,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350001058] [2021-10-28 09:52:26,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350001058] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:26,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480503186] [2021-10-28 09:52:26,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:52:26,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:26,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:26,535 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:26,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:52:27,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-10-28 09:52:27,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:27,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-28 09:52:27,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-10-28 09:52:27,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480503186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:27,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:27,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-10-28 09:52:27,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141207621] [2021-10-28 09:52:27,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 09:52:27,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:27,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 09:52:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:52:27,712 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 23 states have return successors, (43), 22 states have call predecessors, (43), 3 states have call successors, (43) [2021-10-28 09:52:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:28,052 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-10-28 09:52:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 09:52:28,055 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 23 states have return successors, (43), 22 states have call predecessors, (43), 3 states have call successors, (43) Word has length 136 [2021-10-28 09:52:28,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:28,057 INFO L225 Difference]: With dead ends: 82 [2021-10-28 09:52:28,057 INFO L226 Difference]: Without dead ends: 78 [2021-10-28 09:52:28,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=1570, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 09:52:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-28 09:52:28,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-10-28 09:52:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 53 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (24), 23 states have call predecessors, (24), 2 states have call successors, (24) [2021-10-28 09:52:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-10-28 09:52:28,064 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2021-10-28 09:52:28,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:28,064 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-10-28 09:52:28,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 23 states have return successors, (43), 22 states have call predecessors, (43), 3 states have call successors, (43) [2021-10-28 09:52:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-10-28 09:52:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-10-28 09:52:28,066 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:28,066 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:28,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:28,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 09:52:28,283 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:28,283 INFO L85 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2021-10-28 09:52:28,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:28,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008880447] [2021-10-28 09:52:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:28,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:28,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:28,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:28,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:28,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:28,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:28,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:28,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:28,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:28,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:28,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:28,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:28,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:28,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:28,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:29,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:29,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:29,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:29,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:29,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:29,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:29,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:29,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:29,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-10-28 09:52:29,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:29,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008880447] [2021-10-28 09:52:29,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008880447] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:29,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131829294] [2021-10-28 09:52:29,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:52:29,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:29,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:29,283 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:29,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:52:29,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:52:29,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:29,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-28 09:52:29,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-10-28 09:52:30,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131829294] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:30,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:30,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-10-28 09:52:30,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131925423] [2021-10-28 09:52:30,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 09:52:30,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:30,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 09:52:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2021-10-28 09:52:30,439 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 29 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 24 states have return successors, (45), 23 states have call predecessors, (45), 3 states have call successors, (45) [2021-10-28 09:52:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:30,741 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-10-28 09:52:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 09:52:30,742 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 29 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 24 states have return successors, (45), 23 states have call predecessors, (45), 3 states have call successors, (45) Word has length 142 [2021-10-28 09:52:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:30,743 INFO L225 Difference]: With dead ends: 85 [2021-10-28 09:52:30,743 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 09:52:30,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 09:52:30,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 09:52:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-28 09:52:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 55 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2021-10-28 09:52:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-10-28 09:52:30,751 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2021-10-28 09:52:30,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:30,752 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-10-28 09:52:30,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 29 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 24 states have return successors, (45), 23 states have call predecessors, (45), 3 states have call successors, (45) [2021-10-28 09:52:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-10-28 09:52:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-10-28 09:52:30,754 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:30,754 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:30,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-28 09:52:30,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:30,959 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:30,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:30,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2021-10-28 09:52:30,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:30,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517248168] [2021-10-28 09:52:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:30,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:31,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:32,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:32,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:32,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-10-28 09:52:32,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:32,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517248168] [2021-10-28 09:52:32,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517248168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:32,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270342543] [2021-10-28 09:52:32,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:52:32,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:32,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:32,123 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:32,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 09:52:32,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-10-28 09:52:32,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:32,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 09:52:32,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-10-28 09:52:33,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270342543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:33,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:33,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-10-28 09:52:33,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653635139] [2021-10-28 09:52:33,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 09:52:33,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:33,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 09:52:33,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2021-10-28 09:52:33,336 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 25 states have return successors, (47), 24 states have call predecessors, (47), 3 states have call successors, (47) [2021-10-28 09:52:33,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:33,674 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-10-28 09:52:33,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 09:52:33,675 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 25 states have return successors, (47), 24 states have call predecessors, (47), 3 states have call successors, (47) Word has length 148 [2021-10-28 09:52:33,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:33,676 INFO L225 Difference]: With dead ends: 88 [2021-10-28 09:52:33,677 INFO L226 Difference]: Without dead ends: 84 [2021-10-28 09:52:33,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1031, Invalid=1831, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 09:52:33,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-28 09:52:33,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-10-28 09:52:33,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 57 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2021-10-28 09:52:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-10-28 09:52:33,684 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2021-10-28 09:52:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:33,684 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-10-28 09:52:33,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 25 states have return successors, (47), 24 states have call predecessors, (47), 3 states have call successors, (47) [2021-10-28 09:52:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-10-28 09:52:33,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-28 09:52:33,686 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:33,686 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:33,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:33,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:33,907 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:33,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2021-10-28 09:52:33,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:33,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769266006] [2021-10-28 09:52:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:33,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:33,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-10-28 09:52:34,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:34,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769266006] [2021-10-28 09:52:34,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769266006] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:34,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095076730] [2021-10-28 09:52:34,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:52:34,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:34,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:34,963 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:34,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 09:52:35,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-10-28 09:52:35,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:35,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 09:52:35,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-10-28 09:52:36,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095076730] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:36,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:36,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-10-28 09:52:36,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499354747] [2021-10-28 09:52:36,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 09:52:36,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:36,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 09:52:36,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=545, Unknown=0, NotChecked=0, Total=930 [2021-10-28 09:52:36,237 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 26 states have return successors, (49), 25 states have call predecessors, (49), 3 states have call successors, (49) [2021-10-28 09:52:36,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:36,559 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-10-28 09:52:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 09:52:36,560 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 26 states have return successors, (49), 25 states have call predecessors, (49), 3 states have call successors, (49) Word has length 154 [2021-10-28 09:52:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:36,562 INFO L225 Difference]: With dead ends: 91 [2021-10-28 09:52:36,562 INFO L226 Difference]: Without dead ends: 87 [2021-10-28 09:52:36,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1111, Invalid=1969, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 09:52:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-28 09:52:36,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-28 09:52:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 59 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2021-10-28 09:52:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-10-28 09:52:36,570 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2021-10-28 09:52:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:36,570 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-10-28 09:52:36,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 26 states have return successors, (49), 25 states have call predecessors, (49), 3 states have call successors, (49) [2021-10-28 09:52:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-10-28 09:52:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-10-28 09:52:36,574 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:36,574 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:36,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:36,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 09:52:36,783 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:36,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:36,784 INFO L85 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2021-10-28 09:52:36,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:36,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435904267] [2021-10-28 09:52:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:36,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:36,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:37,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:37,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:37,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:37,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:37,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:37,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:37,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:37,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:37,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:38,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:38,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:38,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:38,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:38,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:38,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:38,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:38,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:38,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:38,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:39,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:39,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:39,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:39,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:39,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:39,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-10-28 09:52:39,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:39,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435904267] [2021-10-28 09:52:39,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435904267] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:39,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024974131] [2021-10-28 09:52:39,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:52:39,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:39,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:39,615 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:39,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 09:52:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:40,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 107 conjunts are in the unsatisfiable core [2021-10-28 09:52:40,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-10-28 09:52:41,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024974131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:41,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:41,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2021-10-28 09:52:41,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425361580] [2021-10-28 09:52:41,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-28 09:52:41,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:41,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-28 09:52:41,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 09:52:41,457 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) [2021-10-28 09:52:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:42,459 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-10-28 09:52:42,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-28 09:52:42,460 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) Word has length 160 [2021-10-28 09:52:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:42,464 INFO L225 Difference]: With dead ends: 94 [2021-10-28 09:52:42,464 INFO L226 Difference]: Without dead ends: 90 [2021-10-28 09:52:42,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 09:52:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-28 09:52:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-10-28 09:52:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 61 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (28), 27 states have call predecessors, (28), 2 states have call successors, (28) [2021-10-28 09:52:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-10-28 09:52:42,478 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 160 [2021-10-28 09:52:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:42,479 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-10-28 09:52:42,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) [2021-10-28 09:52:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-10-28 09:52:42,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-10-28 09:52:42,481 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:42,481 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:42,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-28 09:52:42,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 09:52:42,696 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:52:42,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:42,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1845527796, now seen corresponding path program 26 times [2021-10-28 09:52:42,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:42,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438992241] [2021-10-28 09:52:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:42,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:42,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:42,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:42,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:42,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:43,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:44,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:52:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-10-28 09:52:44,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:44,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438992241] [2021-10-28 09:52:44,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438992241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:44,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068946592] [2021-10-28 09:52:44,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:52:44,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:44,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:44,066 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:44,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 09:52:45,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:52:45,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:45,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 09:52:45,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-10-28 09:52:45,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068946592] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:52:45,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:52:45,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [31] total 33 [2021-10-28 09:52:45,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501046918] [2021-10-28 09:52:45,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 09:52:45,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 09:52:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=640, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 09:52:45,802 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2021-10-28 09:52:46,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:46,513 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-10-28 09:52:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 09:52:46,513 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) Word has length 166 [2021-10-28 09:52:46,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:46,514 INFO L225 Difference]: With dead ends: 90 [2021-10-28 09:52:46,514 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:52:46,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1226, Invalid=2314, Unknown=0, NotChecked=0, Total=3540 [2021-10-28 09:52:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:52:46,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:52:46,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:52:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:52:46,517 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 166 [2021-10-28 09:52:46,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:46,518 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:52:46,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2021-10-28 09:52:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:52:46,519 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:52:46,522 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:52:46,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-28 09:52:46,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 09:52:46,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 09:52:46,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:52:46,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:52:46,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:52:46,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:52:46,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:52:46,784 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 09:52:46,784 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 09:52:46,784 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 09:52:46,784 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 09:52:46,784 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-10-28 09:52:46,785 INFO L857 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2021-10-28 09:52:46,785 INFO L857 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2021-10-28 09:52:46,785 INFO L853 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (and (<= 25 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 25)) [2021-10-28 09:52:46,785 INFO L857 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2021-10-28 09:52:46,785 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2021-10-28 09:52:46,785 INFO L857 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2021-10-28 09:52:46,786 INFO L857 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2021-10-28 09:52:46,786 INFO L853 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2021-10-28 09:52:46,786 INFO L860 garLoopResultBuilder]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2021-10-28 09:52:46,786 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-28 09:52:46,787 INFO L857 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-10-28 09:52:46,791 INFO L731 BasicCegarLoop]: Path program histogram: [26, 1] [2021-10-28 09:52:46,794 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:52:46,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:52:46 BoogieIcfgContainer [2021-10-28 09:52:46,802 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:52:46,803 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:52:46,803 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:52:46,803 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:52:46,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:51:55" (3/4) ... [2021-10-28 09:52:46,808 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:52:46,819 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-10-28 09:52:46,835 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-28 09:52:46,836 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 09:52:46,837 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:52:46,837 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:52:46,886 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:52:46,887 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:52:46,888 INFO L168 Benchmark]: Toolchain (without parser) took 51833.39 ms. Allocated memory was 100.7 MB in the beginning and 371.2 MB in the end (delta: 270.5 MB). Free memory was 67.2 MB in the beginning and 162.1 MB in the end (delta: -94.9 MB). Peak memory consumption was 176.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:52:46,889 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 100.7 MB. Free memory is still 54.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:52:46,889 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.05 ms. Allocated memory is still 100.7 MB. Free memory was 67.1 MB in the beginning and 75.8 MB in the end (delta: -8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:52:46,889 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.03 ms. Allocated memory is still 100.7 MB. Free memory was 75.8 MB in the beginning and 74.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:52:46,890 INFO L168 Benchmark]: Boogie Preprocessor took 22.57 ms. Allocated memory is still 100.7 MB. Free memory was 74.6 MB in the beginning and 73.7 MB in the end (delta: 899.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:52:46,890 INFO L168 Benchmark]: RCFGBuilder took 319.54 ms. Allocated memory is still 100.7 MB. Free memory was 73.7 MB in the beginning and 64.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:52:46,890 INFO L168 Benchmark]: TraceAbstraction took 51007.40 ms. Allocated memory was 100.7 MB in the beginning and 371.2 MB in the end (delta: 270.5 MB). Free memory was 64.2 MB in the beginning and 164.2 MB in the end (delta: -100.0 MB). Peak memory consumption was 170.8 MB. Max. memory is 16.1 GB. [2021-10-28 09:52:46,892 INFO L168 Benchmark]: Witness Printer took 84.32 ms. Allocated memory is still 371.2 MB. Free memory was 164.2 MB in the beginning and 162.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:52:46,893 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 100.7 MB. Free memory is still 54.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 351.05 ms. Allocated memory is still 100.7 MB. Free memory was 67.1 MB in the beginning and 75.8 MB in the end (delta: -8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.03 ms. Allocated memory is still 100.7 MB. Free memory was 75.8 MB in the beginning and 74.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.57 ms. Allocated memory is still 100.7 MB. Free memory was 74.6 MB in the beginning and 73.7 MB in the end (delta: 899.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 319.54 ms. Allocated memory is still 100.7 MB. Free memory was 73.7 MB in the beginning and 64.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 51007.40 ms. Allocated memory was 100.7 MB in the beginning and 371.2 MB in the end (delta: 270.5 MB). Free memory was 64.2 MB in the beginning and 164.2 MB in the end (delta: -100.0 MB). Peak memory consumption was 170.8 MB. Max. memory is 16.1 GB. * Witness Printer took 84.32 ms. Allocated memory is still 371.2 MB. Free memory was 164.2 MB in the beginning and 162.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 50.8s, OverallIterations: 27, TraceHistogramMax: 27, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.0s, AutomataDifference: 6.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 373 SDtfs, 1247 SDslu, 4142 SDs, 0 SdLazy, 3191 SolverSat, 296 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3933 GetRequests, 3072 SyntacticMatches, 2 SemanticMatches, 859 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5551 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=26, InterpolantAutomatonStates: 511, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 26.5s InterpolantComputationTime, 4742 NumberOfCodeBlocks, 4742 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 4689 ConstructedInterpolants, 0 QuantifiedInterpolants, 12541 SizeOfPredicates, 352 NumberOfNonLiveVariables, 6266 ConjunctsInSsa, 859 ConjunctsInUnsatCore, 53 InterpolantComputations, 2 PerfectInterpolantSequences, 20956/37908 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 09:52:46,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7166b1c-9c18-4401-9217-b6967aec6a0a/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...