./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:01:12,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:01:12,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:01:12,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:01:12,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:01:12,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:01:12,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:01:12,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:01:12,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:01:12,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:01:12,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:01:12,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:01:12,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:01:12,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:01:12,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:01:12,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:01:12,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:01:12,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:01:12,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:01:12,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:01:12,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:01:12,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:01:12,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:01:12,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:01:12,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:01:12,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:01:12,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:01:12,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:01:12,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:01:12,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:01:12,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:01:12,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:01:12,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:01:12,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:01:12,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:01:12,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:01:12,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:01:12,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:01:12,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:01:12,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:01:12,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:01:12,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:01:12,178 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:01:12,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:01:12,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:01:12,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:01:12,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:01:12,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:01:12,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:01:12,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:01:12,180 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:01:12,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:01:12,181 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:01:12,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:01:12,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:01:12,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:01:12,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:01:12,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:01:12,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:01:12,182 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:01:12,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:01:12,182 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:01:12,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:01:12,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:01:12,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:01:12,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:01:12,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:01:12,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:01:12,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:01:12,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:01:12,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:01:12,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:01:12,183 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:01:12,183 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:01:12,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:01:12,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:01:12,184 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_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c [2021-12-06 20:01:12,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:01:12,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:01:12,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:01:12,391 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:01:12,391 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:01:12,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2021-12-06 20:01:12,436 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/data/a75d5207d/a9ca3f8fc94e4633b7b134f8a527d6eb/FLAG443848d6f [2021-12-06 20:01:12,791 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:01:12,791 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2021-12-06 20:01:12,796 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/data/a75d5207d/a9ca3f8fc94e4633b7b134f8a527d6eb/FLAG443848d6f [2021-12-06 20:01:12,805 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/data/a75d5207d/a9ca3f8fc94e4633b7b134f8a527d6eb [2021-12-06 20:01:12,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:01:12,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:01:12,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:01:12,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:01:12,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:01:12,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:01:12" (1/1) ... [2021-12-06 20:01:12,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6665cce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:12, skipping insertion in model container [2021-12-06 20:01:12,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:01:12" (1/1) ... [2021-12-06 20:01:12,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:01:12,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:01:12,946 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2021-12-06 20:01:12,956 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:01:12,962 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:01:12,970 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2021-12-06 20:01:12,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:01:12,984 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:01:12,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:12 WrapperNode [2021-12-06 20:01:12,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:01:12,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:01:12,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:01:12,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:01:12,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:12" (1/1) ... [2021-12-06 20:01:12,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:12" (1/1) ... [2021-12-06 20:01:13,008 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2021-12-06 20:01:13,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:01:13,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:01:13,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:01:13,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:01:13,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:12" (1/1) ... [2021-12-06 20:01:13,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:12" (1/1) ... [2021-12-06 20:01:13,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:12" (1/1) ... [2021-12-06 20:01:13,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:12" (1/1) ... [2021-12-06 20:01:13,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:12" (1/1) ... [2021-12-06 20:01:13,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:12" (1/1) ... [2021-12-06 20:01:13,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:12" (1/1) ... [2021-12-06 20:01:13,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:01:13,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:01:13,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:01:13,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:01:13,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:12" (1/1) ... [2021-12-06 20:01:13,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:01:13,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:13,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:01:13,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:01:13,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:01:13,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:01:13,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:01:13,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:01:13,124 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:01:13,125 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:01:13,204 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:01:13,209 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:01:13,209 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 20:01:13,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:01:13 BoogieIcfgContainer [2021-12-06 20:01:13,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:01:13,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:01:13,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:01:13,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:01:13,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:01:12" (1/3) ... [2021-12-06 20:01:13,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e287218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:01:13, skipping insertion in model container [2021-12-06 20:01:13,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:12" (2/3) ... [2021-12-06 20:01:13,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e287218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:01:13, skipping insertion in model container [2021-12-06 20:01:13,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:01:13" (3/3) ... [2021-12-06 20:01:13,218 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2021-12-06 20:01:13,223 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:01:13,223 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:01:13,263 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:01:13,268 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 20:01:13,269 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:01:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:13,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 20:01:13,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:13,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:13,284 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:13,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash -493598204, now seen corresponding path program 1 times [2021-12-06 20:01:13,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:13,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892917274] [2021-12-06 20:01:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:13,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:13,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:13,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892917274] [2021-12-06 20:01:13,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892917274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:13,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:13,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:01:13,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691360528] [2021-12-06 20:01:13,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:13,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:01:13,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:13,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:01:13,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:01:13,420 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:13,431 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2021-12-06 20:01:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:01:13,432 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 20:01:13,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:13,437 INFO L225 Difference]: With dead ends: 35 [2021-12-06 20:01:13,438 INFO L226 Difference]: Without dead ends: 17 [2021-12-06 20:01:13,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:01:13,443 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:13,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:01:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-06 20:01:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-06 20:01:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-12-06 20:01:13,470 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 12 [2021-12-06 20:01:13,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:13,470 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-12-06 20:01:13,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:13,471 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-12-06 20:01:13,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 20:01:13,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:13,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:13,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:01:13,472 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:13,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:13,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2059231113, now seen corresponding path program 1 times [2021-12-06 20:01:13,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:13,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467778310] [2021-12-06 20:01:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:13,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:13,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:13,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467778310] [2021-12-06 20:01:13,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467778310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:13,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:13,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:01:13,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600661133] [2021-12-06 20:01:13,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:13,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:01:13,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:13,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:01:13,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:01:13,560 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:13,605 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2021-12-06 20:01:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:01:13,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 20:01:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:13,606 INFO L225 Difference]: With dead ends: 34 [2021-12-06 20:01:13,606 INFO L226 Difference]: Without dead ends: 21 [2021-12-06 20:01:13,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:01:13,608 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:13,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:01:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-06 20:01:13,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-12-06 20:01:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-12-06 20:01:13,613 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 12 [2021-12-06 20:01:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:13,613 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-12-06 20:01:13,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-12-06 20:01:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 20:01:13,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:13,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:13,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:01:13,614 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:13,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:13,615 INFO L85 PathProgramCache]: Analyzing trace with hash 573171571, now seen corresponding path program 1 times [2021-12-06 20:01:13,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:13,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911798588] [2021-12-06 20:01:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:13,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:01:13,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:13,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911798588] [2021-12-06 20:01:13,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911798588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:13,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:13,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:01:13,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838834553] [2021-12-06 20:01:13,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:13,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:01:13,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:13,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:01:13,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:01:13,660 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:13,695 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-12-06 20:01:13,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:01:13,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 20:01:13,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:13,696 INFO L225 Difference]: With dead ends: 41 [2021-12-06 20:01:13,696 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 20:01:13,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:01:13,697 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:13,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 34 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:01:13,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 20:01:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-12-06 20:01:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:13,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-12-06 20:01:13,702 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 15 [2021-12-06 20:01:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:13,702 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-12-06 20:01:13,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:13,702 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-12-06 20:01:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 20:01:13,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:13,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:13,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 20:01:13,703 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash 630429873, now seen corresponding path program 1 times [2021-12-06 20:01:13,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:13,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749996794] [2021-12-06 20:01:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:13,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:01:13,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:13,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749996794] [2021-12-06 20:01:13,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749996794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:13,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:13,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:01:13,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26905559] [2021-12-06 20:01:13,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:13,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:01:13,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:13,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:01:13,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:01:13,765 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:13,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:13,789 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2021-12-06 20:01:13,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:01:13,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 20:01:13,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:13,792 INFO L225 Difference]: With dead ends: 49 [2021-12-06 20:01:13,792 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 20:01:13,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:01:13,794 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:13,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 29 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:01:13,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 20:01:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-12-06 20:01:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2021-12-06 20:01:13,803 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 15 [2021-12-06 20:01:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:13,804 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2021-12-06 20:01:13,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2021-12-06 20:01:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 20:01:13,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:13,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:13,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 20:01:13,805 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:13,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:13,806 INFO L85 PathProgramCache]: Analyzing trace with hash 630489455, now seen corresponding path program 1 times [2021-12-06 20:01:13,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:13,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677993458] [2021-12-06 20:01:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:13,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:13,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:13,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677993458] [2021-12-06 20:01:13,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677993458] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:13,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184574730] [2021-12-06 20:01:13,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:13,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:13,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:13,855 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:01:13,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:01:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:13,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:01:13,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:13,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:01:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:13,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184574730] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:01:13,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:01:13,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-06 20:01:13,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315749030] [2021-12-06 20:01:13,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:01:13,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 20:01:13,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:13,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 20:01:13,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:01:13,986 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:14,037 INFO L93 Difference]: Finished difference Result 79 states and 115 transitions. [2021-12-06 20:01:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:01:14,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 20:01:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:14,038 INFO L225 Difference]: With dead ends: 79 [2021-12-06 20:01:14,038 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 20:01:14,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:01:14,039 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:14,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 18 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:01:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 20:01:14,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-12-06 20:01:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2021-12-06 20:01:14,053 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 15 [2021-12-06 20:01:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:14,054 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2021-12-06 20:01:14,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:14,054 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2021-12-06 20:01:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 20:01:14,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:14,055 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:14,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:01:14,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:14,257 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:14,260 INFO L85 PathProgramCache]: Analyzing trace with hash -901646477, now seen corresponding path program 2 times [2021-12-06 20:01:14,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:14,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623310280] [2021-12-06 20:01:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:14,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:14,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623310280] [2021-12-06 20:01:14,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623310280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45831417] [2021-12-06 20:01:14,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:01:14,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:14,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:14,445 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:01:14,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:01:14,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:01:14,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:01:14,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:01:14,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:01:14,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:01:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:01:14,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45831417] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:01:14,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:01:14,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2021-12-06 20:01:14,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331798463] [2021-12-06 20:01:14,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:01:14,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 20:01:14,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:14,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 20:01:14,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:01:14,638 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:14,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:14,909 INFO L93 Difference]: Finished difference Result 210 states and 294 transitions. [2021-12-06 20:01:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 20:01:14,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 20:01:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:14,911 INFO L225 Difference]: With dead ends: 210 [2021-12-06 20:01:14,911 INFO L226 Difference]: Without dead ends: 164 [2021-12-06 20:01:14,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=381, Invalid=951, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 20:01:14,913 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 284 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:14,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 70 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:01:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-06 20:01:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 142. [2021-12-06 20:01:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.2765957446808511) internal successors, (180), 141 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 180 transitions. [2021-12-06 20:01:14,929 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 180 transitions. Word has length 24 [2021-12-06 20:01:14,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:14,930 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 180 transitions. [2021-12-06 20:01:14,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 180 transitions. [2021-12-06 20:01:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 20:01:14,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:14,931 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:14,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:01:15,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:15,133 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:15,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:15,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1843449907, now seen corresponding path program 1 times [2021-12-06 20:01:15,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:15,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981613276] [2021-12-06 20:01:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:15,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-06 20:01:15,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:15,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981613276] [2021-12-06 20:01:15,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981613276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:15,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:15,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:01:15,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449040500] [2021-12-06 20:01:15,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:15,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:01:15,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:15,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:01:15,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:01:15,254 INFO L87 Difference]: Start difference. First operand 142 states and 180 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:15,296 INFO L93 Difference]: Finished difference Result 331 states and 425 transitions. [2021-12-06 20:01:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:01:15,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 20:01:15,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:15,299 INFO L225 Difference]: With dead ends: 331 [2021-12-06 20:01:15,299 INFO L226 Difference]: Without dead ends: 193 [2021-12-06 20:01:15,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:01:15,302 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:15,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 38 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:01:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-06 20:01:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2021-12-06 20:01:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.2657342657342658) internal successors, (181), 143 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 181 transitions. [2021-12-06 20:01:15,323 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 181 transitions. Word has length 30 [2021-12-06 20:01:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:15,323 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 181 transitions. [2021-12-06 20:01:15,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 181 transitions. [2021-12-06 20:01:15,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 20:01:15,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:15,325 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:15,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 20:01:15,325 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:15,326 INFO L85 PathProgramCache]: Analyzing trace with hash 397594855, now seen corresponding path program 1 times [2021-12-06 20:01:15,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:15,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671626537] [2021-12-06 20:01:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:15,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 20:01:15,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:15,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671626537] [2021-12-06 20:01:15,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671626537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:15,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:15,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:01:15,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680905367] [2021-12-06 20:01:15,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:15,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:01:15,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:15,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:01:15,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:01:15,351 INFO L87 Difference]: Start difference. First operand 144 states and 181 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:15,367 INFO L93 Difference]: Finished difference Result 231 states and 291 transitions. [2021-12-06 20:01:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:01:15,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 20:01:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:15,369 INFO L225 Difference]: With dead ends: 231 [2021-12-06 20:01:15,369 INFO L226 Difference]: Without dead ends: 160 [2021-12-06 20:01:15,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:01:15,371 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:15,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:01:15,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-06 20:01:15,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-12-06 20:01:15,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.2448979591836735) internal successors, (183), 147 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 183 transitions. [2021-12-06 20:01:15,385 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 183 transitions. Word has length 31 [2021-12-06 20:01:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:15,385 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 183 transitions. [2021-12-06 20:01:15,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 183 transitions. [2021-12-06 20:01:15,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 20:01:15,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:15,387 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:15,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 20:01:15,387 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:15,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:15,388 INFO L85 PathProgramCache]: Analyzing trace with hash 399501479, now seen corresponding path program 1 times [2021-12-06 20:01:15,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:15,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230119626] [2021-12-06 20:01:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:15,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:15,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:15,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230119626] [2021-12-06 20:01:15,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230119626] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:15,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166486680] [2021-12-06 20:01:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:15,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:15,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:15,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:01:15,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:01:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:15,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 20:01:15,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:15,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:01:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:15,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166486680] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:01:15,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:01:15,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-12-06 20:01:15,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758421316] [2021-12-06 20:01:15,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:01:15,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 20:01:15,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:15,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 20:01:15,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2021-12-06 20:01:15,688 INFO L87 Difference]: Start difference. First operand 148 states and 183 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:15,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:15,827 INFO L93 Difference]: Finished difference Result 437 states and 587 transitions. [2021-12-06 20:01:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 20:01:15,827 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 20:01:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:15,829 INFO L225 Difference]: With dead ends: 437 [2021-12-06 20:01:15,829 INFO L226 Difference]: Without dead ends: 293 [2021-12-06 20:01:15,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2021-12-06 20:01:15,832 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 177 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:15,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 32 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:01:15,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-06 20:01:15,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 292. [2021-12-06 20:01:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.2336769759450172) internal successors, (359), 291 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:15,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 359 transitions. [2021-12-06 20:01:15,852 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 359 transitions. Word has length 31 [2021-12-06 20:01:15,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:15,853 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 359 transitions. [2021-12-06 20:01:15,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:15,853 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 359 transitions. [2021-12-06 20:01:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 20:01:15,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:15,855 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:15,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:01:16,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:16,057 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:16,058 INFO L85 PathProgramCache]: Analyzing trace with hash -871125337, now seen corresponding path program 2 times [2021-12-06 20:01:16,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:16,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815034435] [2021-12-06 20:01:16,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:16,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:16,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:16,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815034435] [2021-12-06 20:01:16,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815034435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:16,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453404518] [2021-12-06 20:01:16,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:01:16,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:16,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:16,294 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:01:16,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:01:16,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:01:16,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:01:16,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:01:16,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:16,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:01:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:16,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453404518] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:01:16,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:01:16,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2021-12-06 20:01:16,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295775820] [2021-12-06 20:01:16,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:01:16,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 20:01:16,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 20:01:16,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 20:01:16,834 INFO L87 Difference]: Start difference. First operand 292 states and 359 transitions. Second operand has 49 states, 49 states have (on average 3.0) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:17,208 INFO L93 Difference]: Finished difference Result 869 states and 1163 transitions. [2021-12-06 20:01:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 20:01:17,208 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-06 20:01:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:17,212 INFO L225 Difference]: With dead ends: 869 [2021-12-06 20:01:17,212 INFO L226 Difference]: Without dead ends: 581 [2021-12-06 20:01:17,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 20:01:17,216 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 381 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:17,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 27 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:01:17,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-12-06 20:01:17,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 580. [2021-12-06 20:01:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 1.2279792746113989) internal successors, (711), 579 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 711 transitions. [2021-12-06 20:01:17,244 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 711 transitions. Word has length 55 [2021-12-06 20:01:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:17,245 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 711 transitions. [2021-12-06 20:01:17,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:17,245 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 711 transitions. [2021-12-06 20:01:17,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 20:01:17,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:17,249 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:17,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:01:17,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 20:01:17,451 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:17,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:17,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1917139623, now seen corresponding path program 3 times [2021-12-06 20:01:17,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:17,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108319817] [2021-12-06 20:01:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:17,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:17,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:17,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108319817] [2021-12-06 20:01:17,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108319817] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:17,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471419133] [2021-12-06 20:01:17,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:01:17,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:17,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:17,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:01:17,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:01:17,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 20:01:17,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:01:17,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:01:17,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-12-06 20:01:18,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:01:18,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471419133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:18,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:01:18,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [33] total 37 [2021-12-06 20:01:18,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394234605] [2021-12-06 20:01:18,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:18,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:01:18,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:18,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:01:18,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=794, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 20:01:18,071 INFO L87 Difference]: Start difference. First operand 580 states and 711 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:18,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:18,132 INFO L93 Difference]: Finished difference Result 583 states and 713 transitions. [2021-12-06 20:01:18,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:01:18,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-06 20:01:18,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:18,135 INFO L225 Difference]: With dead ends: 583 [2021-12-06 20:01:18,135 INFO L226 Difference]: Without dead ends: 383 [2021-12-06 20:01:18,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=548, Invalid=934, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 20:01:18,137 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:18,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:01:18,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-12-06 20:01:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 382. [2021-12-06 20:01:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.3280839895013123) internal successors, (506), 381 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 506 transitions. [2021-12-06 20:01:18,156 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 506 transitions. Word has length 103 [2021-12-06 20:01:18,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:18,156 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 506 transitions. [2021-12-06 20:01:18,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:18,157 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 506 transitions. [2021-12-06 20:01:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 20:01:18,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:18,158 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:18,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 20:01:18,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:18,360 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:18,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:18,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1743203367, now seen corresponding path program 1 times [2021-12-06 20:01:18,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:18,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788928054] [2021-12-06 20:01:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:18,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:18,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:18,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788928054] [2021-12-06 20:01:18,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788928054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:18,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366990035] [2021-12-06 20:01:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:18,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:18,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:18,724 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:01:18,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:01:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:18,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 20:01:18,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:19,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:01:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:20,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366990035] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:01:20,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:01:20,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 96 [2021-12-06 20:01:20,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49599678] [2021-12-06 20:01:20,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:01:20,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-06 20:01:20,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:20,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-06 20:01:20,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4099, Invalid=5213, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 20:01:20,127 INFO L87 Difference]: Start difference. First operand 382 states and 506 transitions. Second operand has 97 states, 97 states have (on average 3.0) internal successors, (291), 96 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:21,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:21,146 INFO L93 Difference]: Finished difference Result 1145 states and 1649 transitions. [2021-12-06 20:01:21,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 20:01:21,147 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.0) internal successors, (291), 96 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-06 20:01:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:21,150 INFO L225 Difference]: With dead ends: 1145 [2021-12-06 20:01:21,150 INFO L226 Difference]: Without dead ends: 767 [2021-12-06 20:01:21,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5825 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6176, Invalid=10080, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 20:01:21,155 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 624 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:21,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 52 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:01:21,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-12-06 20:01:21,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 766. [2021-12-06 20:01:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 1.330718954248366) internal successors, (1018), 765 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1018 transitions. [2021-12-06 20:01:21,177 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1018 transitions. Word has length 103 [2021-12-06 20:01:21,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:21,177 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 1018 transitions. [2021-12-06 20:01:21,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.0) internal successors, (291), 96 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:21,178 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1018 transitions. [2021-12-06 20:01:21,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-06 20:01:21,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:21,179 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:21,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 20:01:21,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:21,380 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:21,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:21,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1216304089, now seen corresponding path program 2 times [2021-12-06 20:01:21,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:21,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848942832] [2021-12-06 20:01:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:21,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:22,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:22,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848942832] [2021-12-06 20:01:22,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848942832] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:22,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477115781] [2021-12-06 20:01:22,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:01:22,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:22,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:22,433 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:01:22,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:01:22,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:01:22,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:01:22,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:01:22,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 305 refuted. 0 times theorem prover too weak. 5430 trivial. 0 not checked. [2021-12-06 20:01:22,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:01:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 305 refuted. 0 times theorem prover too weak. 5430 trivial. 0 not checked. [2021-12-06 20:01:23,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477115781] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:01:23,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:01:23,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 6, 6] total 74 [2021-12-06 20:01:23,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546411208] [2021-12-06 20:01:23,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:01:23,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-06 20:01:23,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:23,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-06 20:01:23,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2369, Invalid=3181, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 20:01:23,252 INFO L87 Difference]: Start difference. First operand 766 states and 1018 transitions. Second operand has 75 states, 75 states have (on average 3.0) internal successors, (225), 74 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:29,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:29,775 INFO L93 Difference]: Finished difference Result 13975 states and 18691 transitions. [2021-12-06 20:01:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-12-06 20:01:29,775 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.0) internal successors, (225), 74 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-12-06 20:01:29,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:29,825 INFO L225 Difference]: With dead ends: 13975 [2021-12-06 20:01:29,825 INFO L226 Difference]: Without dead ends: 13213 [2021-12-06 20:01:29,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20539 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=22797, Invalid=50915, Unknown=0, NotChecked=0, Total=73712 [2021-12-06 20:01:29,837 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2364 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 907 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2364 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 907 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:29,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2364 Valid, 55 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [907 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:01:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13213 states. [2021-12-06 20:01:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13213 to 1244. [2021-12-06 20:01:30,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 1.3290426387771521) internal successors, (1652), 1243 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1652 transitions. [2021-12-06 20:01:30,003 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1652 transitions. Word has length 199 [2021-12-06 20:01:30,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:30,003 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 1652 transitions. [2021-12-06 20:01:30,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.0) internal successors, (225), 74 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1652 transitions. [2021-12-06 20:01:30,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-06 20:01:30,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:30,006 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:30,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 20:01:30,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 20:01:30,207 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:30,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:30,208 INFO L85 PathProgramCache]: Analyzing trace with hash 818921193, now seen corresponding path program 1 times [2021-12-06 20:01:30,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:30,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778623031] [2021-12-06 20:01:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:30,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:31,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:31,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778623031] [2021-12-06 20:01:31,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778623031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:31,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59250536] [2021-12-06 20:01:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:31,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:31,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:31,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:01:31,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:01:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 20:01:31,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:32,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:01:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:36,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59250536] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:01:36,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:01:36,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 201 [2021-12-06 20:01:36,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303726769] [2021-12-06 20:01:36,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:01:36,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2021-12-06 20:01:36,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:36,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2021-12-06 20:01:36,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17959, Invalid=22643, Unknown=0, NotChecked=0, Total=40602 [2021-12-06 20:01:36,041 INFO L87 Difference]: Start difference. First operand 1244 states and 1652 transitions. Second operand has 202 states, 202 states have (on average 3.0) internal successors, (606), 201 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:45,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:45,817 INFO L93 Difference]: Finished difference Result 42301 states and 56655 transitions. [2021-12-06 20:01:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-12-06 20:01:45,818 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 3.0) internal successors, (606), 201 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-12-06 20:01:45,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:45,900 INFO L225 Difference]: With dead ends: 42301 [2021-12-06 20:01:45,900 INFO L226 Difference]: Without dead ends: 41061 [2021-12-06 20:01:45,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26265 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=27001, Invalid=44555, Unknown=0, NotChecked=0, Total=71556 [2021-12-06 20:01:45,910 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1235 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:45,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1235 Valid, 52 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:01:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41061 states. [2021-12-06 20:01:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41061 to 2842. [2021-12-06 20:01:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 1.33051742344245) internal successors, (3780), 2841 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3780 transitions. [2021-12-06 20:01:47,693 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3780 transitions. Word has length 208 [2021-12-06 20:01:47,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:47,693 INFO L470 AbstractCegarLoop]: Abstraction has 2842 states and 3780 transitions. [2021-12-06 20:01:47,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 3.0) internal successors, (606), 201 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:01:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3780 transitions. [2021-12-06 20:01:47,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-12-06 20:01:47,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:47,700 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:47,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:01:47,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 20:01:47,902 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:47,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:47,903 INFO L85 PathProgramCache]: Analyzing trace with hash 692841129, now seen corresponding path program 2 times [2021-12-06 20:01:47,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:47,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616701406] [2021-12-06 20:01:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:47,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 26070 backedges. 0 proven. 26070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:52,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:52,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616701406] [2021-12-06 20:01:52,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616701406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:52,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746698408] [2021-12-06 20:01:52,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:01:52,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:52,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:52,058 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:01:52,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:01:52,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:01:52,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:01:52,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-06 20:01:52,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 26070 backedges. 0 proven. 26070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:57,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:02:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 26070 backedges. 0 proven. 26070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:02:09,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746698408] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:02:09,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:02:09,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135, 135] total 402 [2021-12-06 20:02:09,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036996423] [2021-12-06 20:02:09,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:02:09,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 403 states [2021-12-06 20:02:09,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:02:09,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 403 interpolants. [2021-12-06 20:02:09,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71827, Invalid=90179, Unknown=0, NotChecked=0, Total=162006 [2021-12-06 20:02:09,266 INFO L87 Difference]: Start difference. First operand 2842 states and 3780 transitions. Second operand has 403 states, 403 states have (on average 3.0) internal successors, (1209), 402 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:04:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:04:07,145 INFO L93 Difference]: Finished difference Result 72977 states and 97913 transitions. [2021-12-06 20:04:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 269 states. [2021-12-06 20:04:07,146 INFO L78 Accepts]: Start accepts. Automaton has has 403 states, 403 states have (on average 3.0) internal successors, (1209), 402 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 409 [2021-12-06 20:04:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:04:07,216 INFO L225 Difference]: With dead ends: 72977 [2021-12-06 20:04:07,216 INFO L226 Difference]: Without dead ends: 70139 [2021-12-06 20:04:07,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1084 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 534 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106397 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=107870, Invalid=178890, Unknown=0, NotChecked=0, Total=286760 [2021-12-06 20:04:07,245 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3115 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3115 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:04:07,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3115 Valid, 67 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 20:04:07,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70139 states. [2021-12-06 20:04:16,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70139 to 6058. [2021-12-06 20:04:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6058 states, 6057 states have (on average 1.332012547465742) internal successors, (8068), 6057 states have internal predecessors, (8068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:04:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6058 states to 6058 states and 8068 transitions. [2021-12-06 20:04:16,618 INFO L78 Accepts]: Start accepts. Automaton has 6058 states and 8068 transitions. Word has length 409 [2021-12-06 20:04:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:04:16,618 INFO L470 AbstractCegarLoop]: Abstraction has 6058 states and 8068 transitions. [2021-12-06 20:04:16,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 403 states, 403 states have (on average 3.0) internal successors, (1209), 402 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:04:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 6058 states and 8068 transitions. [2021-12-06 20:04:16,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2021-12-06 20:04:16,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:04:16,627 INFO L514 BasicCegarLoop]: trace histogram [266, 266, 265, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:04:16,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 20:04:16,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 20:04:16,828 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:04:16,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:04:16,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1729868457, now seen corresponding path program 3 times [2021-12-06 20:04:16,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:04:16,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871439547] [2021-12-06 20:04:16,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:04:16,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:04:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 106001 backedges. 0 proven. 106001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:04:32,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:04:32,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871439547] [2021-12-06 20:04:32,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871439547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:04:32,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546644245] [2021-12-06 20:04:32,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:04:32,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:04:32,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:04:32,633 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:04:32,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:04:32,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 20:04:32,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:04:32,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 20:04:32,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:04:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 106001 backedges. 796 proven. 0 refuted. 0 times theorem prover too weak. 105205 trivial. 0 not checked. [2021-12-06 20:04:34,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:04:34,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546644245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:04:34,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:04:34,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [269] total 276 [2021-12-06 20:04:34,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182429314] [2021-12-06 20:04:34,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:04:34,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:04:34,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:04:34,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:04:34,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36066, Invalid=39834, Unknown=0, NotChecked=0, Total=75900 [2021-12-06 20:04:34,814 INFO L87 Difference]: Start difference. First operand 6058 states and 8068 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:04:57,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:04:57,651 INFO L93 Difference]: Finished difference Result 15100 states and 20114 transitions. [2021-12-06 20:04:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 20:04:57,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 811 [2021-12-06 20:04:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:04:57,663 INFO L225 Difference]: With dead ends: 15100 [2021-12-06 20:04:57,663 INFO L226 Difference]: Without dead ends: 15098 [2021-12-06 20:04:57,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 805 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=36070, Invalid=40382, Unknown=0, NotChecked=0, Total=76452 [2021-12-06 20:04:57,687 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:04:57,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 59 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:04:57,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15098 states. [2021-12-06 20:05:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15098 to 9069. [2021-12-06 20:05:11,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9069 states, 9068 states have (on average 1.3319364799294222) internal successors, (12078), 9068 states have internal predecessors, (12078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:05:11,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9069 states to 9069 states and 12078 transitions. [2021-12-06 20:05:11,245 INFO L78 Accepts]: Start accepts. Automaton has 9069 states and 12078 transitions. Word has length 811 [2021-12-06 20:05:11,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:05:11,246 INFO L470 AbstractCegarLoop]: Abstraction has 9069 states and 12078 transitions. [2021-12-06 20:05:11,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:05:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 9069 states and 12078 transitions. [2021-12-06 20:05:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2021-12-06 20:05:11,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:05:11,257 INFO L514 BasicCegarLoop]: trace histogram [266, 266, 201, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:05:11,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 20:05:11,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 20:05:11,459 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:05:11,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:05:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1324962855, now seen corresponding path program 3 times [2021-12-06 20:05:11,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:05:11,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7630749] [2021-12-06 20:05:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:05:11,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:05:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:05:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 106001 backedges. 0 proven. 106001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:05:27,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:05:27,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7630749] [2021-12-06 20:05:27,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7630749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:05:27,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749645893] [2021-12-06 20:05:27,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:05:27,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:05:27,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:05:27,057 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:05:27,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:05:27,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 20:05:27,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:05:27,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 20:05:27,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:05:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 106001 backedges. 796 proven. 0 refuted. 0 times theorem prover too weak. 105205 trivial. 0 not checked. [2021-12-06 20:05:29,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:05:29,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749645893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:05:29,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:05:29,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [269] total 276 [2021-12-06 20:05:29,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472900903] [2021-12-06 20:05:29,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:05:29,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:05:29,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:05:29,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:05:29,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36065, Invalid=39835, Unknown=0, NotChecked=0, Total=75900 [2021-12-06 20:05:29,353 INFO L87 Difference]: Start difference. First operand 9069 states and 12078 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:05:47,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:05:47,762 INFO L93 Difference]: Finished difference Result 12084 states and 16092 transitions. [2021-12-06 20:05:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:05:47,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 811 [2021-12-06 20:05:47,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:05:47,771 INFO L225 Difference]: With dead ends: 12084 [2021-12-06 20:05:47,771 INFO L226 Difference]: Without dead ends: 12082 [2021-12-06 20:05:47,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1081 GetRequests, 805 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=36074, Invalid=40932, Unknown=0, NotChecked=0, Total=77006 [2021-12-06 20:05:47,775 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:05:47,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 83 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:05:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12082 states. [2021-12-06 20:06:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12082 to 9069. [2021-12-06 20:06:01,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9069 states, 9068 states have (on average 1.3319364799294222) internal successors, (12078), 9068 states have internal predecessors, (12078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:06:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9069 states to 9069 states and 12078 transitions. [2021-12-06 20:06:01,289 INFO L78 Accepts]: Start accepts. Automaton has 9069 states and 12078 transitions. Word has length 811 [2021-12-06 20:06:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:06:01,289 INFO L470 AbstractCegarLoop]: Abstraction has 9069 states and 12078 transitions. [2021-12-06 20:06:01,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:06:01,290 INFO L276 IsEmpty]: Start isEmpty. Operand 9069 states and 12078 transitions. [2021-12-06 20:06:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2021-12-06 20:06:01,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:06:01,296 INFO L514 BasicCegarLoop]: trace histogram [266, 266, 266, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:06:01,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 20:06:01,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 20:06:01,497 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:06:01,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:06:01,498 INFO L85 PathProgramCache]: Analyzing trace with hash -229138393, now seen corresponding path program 1 times [2021-12-06 20:06:01,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:06:01,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539757432] [2021-12-06 20:06:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:06:01,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:06:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:06:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 106001 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 106001 trivial. 0 not checked. [2021-12-06 20:06:01,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:06:01,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539757432] [2021-12-06 20:06:01,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539757432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:06:01,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:06:01,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:06:01,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638860399] [2021-12-06 20:06:01,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:06:01,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:06:01,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:06:01,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:06:01,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:06:01,677 INFO L87 Difference]: Start difference. First operand 9069 states and 12078 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:06:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:06:19,985 INFO L93 Difference]: Finished difference Result 15127 states and 20147 transitions. [2021-12-06 20:06:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:06:19,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 811 [2021-12-06 20:06:19,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:06:19,994 INFO L225 Difference]: With dead ends: 15127 [2021-12-06 20:06:19,995 INFO L226 Difference]: Without dead ends: 12099 [2021-12-06 20:06:19,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:06:19,998 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:06:19,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 39 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:06:20,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12099 states. [2021-12-06 20:06:38,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12099 to 10481. [2021-12-06 20:06:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10481 states, 10480 states have (on average 1.3319656488549618) internal successors, (13959), 10480 states have internal predecessors, (13959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:06:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10481 states to 10481 states and 13959 transitions. [2021-12-06 20:06:38,260 INFO L78 Accepts]: Start accepts. Automaton has 10481 states and 13959 transitions. Word has length 811 [2021-12-06 20:06:38,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:06:38,261 INFO L470 AbstractCegarLoop]: Abstraction has 10481 states and 13959 transitions. [2021-12-06 20:06:38,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:06:38,261 INFO L276 IsEmpty]: Start isEmpty. Operand 10481 states and 13959 transitions. [2021-12-06 20:06:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1619 [2021-12-06 20:06:38,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:06:38,283 INFO L514 BasicCegarLoop]: trace histogram [532, 532, 530, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:06:38,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 20:06:38,283 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:06:38,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:06:38,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1783539620, now seen corresponding path program 1 times [2021-12-06 20:06:38,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:06:38,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273731911] [2021-12-06 20:06:38,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:06:38,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:06:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:06:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 424810 backedges. 212802 proven. 106001 refuted. 0 times theorem prover too weak. 106007 trivial. 0 not checked. [2021-12-06 20:06:54,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:06:54,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273731911] [2021-12-06 20:06:54,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273731911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:06:54,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500048878] [2021-12-06 20:06:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:06:54,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:06:54,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:06:54,094 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:06:54,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230494fc-8521-4836-b6f7-5c0bfe734157/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 20:06:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:06:54,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 3273 conjuncts, 269 conjunts are in the unsatisfiable core [2021-12-06 20:06:54,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:07:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 424810 backedges. 212802 proven. 106001 refuted. 0 times theorem prover too weak. 106007 trivial. 0 not checked. [2021-12-06 20:07:13,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:08:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 424810 backedges. 212802 proven. 106001 refuted. 0 times theorem prover too weak. 106007 trivial. 0 not checked. [2021-12-06 20:08:01,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500048878] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:08:01,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:08:01,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [269, 269, 269] total 804 [2021-12-06 20:08:01,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818565922] [2021-12-06 20:08:01,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:08:01,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 805 states [2021-12-06 20:08:01,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:08:01,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 805 interpolants. [2021-12-06 20:08:01,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287299, Invalid=359921, Unknown=0, NotChecked=0, Total=647220 [2021-12-06 20:08:01,224 INFO L87 Difference]: Start difference. First operand 10481 states and 13959 transitions. Second operand has 805 states, 805 states have (on average 3.009937888198758) internal successors, (2423), 804 states have internal predecessors, (2423), 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)