./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y --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 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:45:29,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:45:29,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:45:29,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:45:29,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:45:29,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:45:29,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:45:29,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:45:29,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:45:29,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:45:29,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:45:29,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:45:29,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:45:29,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:45:29,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:45:29,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:45:29,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:45:29,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:45:29,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:45:29,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:45:29,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:45:29,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:45:29,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:45:29,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:45:29,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:45:29,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:45:29,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:45:29,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:45:29,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:45:29,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:45:29,839 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:45:29,840 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:45:29,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:45:29,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:45:29,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:45:29,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:45:29,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:45:29,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:45:29,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:45:29,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:45:29,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:45:29,850 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:45:29,877 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:45:29,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:45:29,878 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:45:29,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:45:29,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:45:29,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:45:29,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:45:29,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:45:29,880 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:45:29,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:45:29,881 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:45:29,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:45:29,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:45:29,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:45:29,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:45:29,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:45:29,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:45:29,882 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:45:29,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:45:29,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:45:29,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:45:29,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:45:29,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:45:29,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:45:29,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:45:29,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:45:29,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:45:29,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:45:29,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:45:29,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:45:29,886 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:45:29,886 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:45:29,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:45:29,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:45:29,891 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_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 [2021-11-13 18:45:30,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:45:30,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:45:30,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:45:30,186 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:45:30,187 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:45:30,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2021-11-13 18:45:30,282 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/data/ab6a6ecb6/3323d2bc53db4eb09bf9e36381b8ac2b/FLAGaad0f2a20 [2021-11-13 18:45:30,703 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:45:30,704 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2021-11-13 18:45:30,714 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/data/ab6a6ecb6/3323d2bc53db4eb09bf9e36381b8ac2b/FLAGaad0f2a20 [2021-11-13 18:45:31,094 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/data/ab6a6ecb6/3323d2bc53db4eb09bf9e36381b8ac2b [2021-11-13 18:45:31,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:45:31,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:45:31,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:45:31,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:45:31,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:45:31,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:45:31" (1/1) ... [2021-11-13 18:45:31,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5edb74c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:31, skipping insertion in model container [2021-11-13 18:45:31,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:45:31" (1/1) ... [2021-11-13 18:45:31,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:45:31,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:45:31,313 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c[318,331] [2021-11-13 18:45:31,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:45:31,332 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:45:31,344 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c[318,331] [2021-11-13 18:45:31,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:45:31,361 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:45:31,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:31 WrapperNode [2021-11-13 18:45:31,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:45:31,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:45:31,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:45:31,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:45:31,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:31" (1/1) ... [2021-11-13 18:45:31,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:31" (1/1) ... [2021-11-13 18:45:31,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:45:31,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:45:31,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:45:31,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:45:31,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:31" (1/1) ... [2021-11-13 18:45:31,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:31" (1/1) ... [2021-11-13 18:45:31,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:31" (1/1) ... [2021-11-13 18:45:31,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:31" (1/1) ... [2021-11-13 18:45:31,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:31" (1/1) ... [2021-11-13 18:45:31,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:31" (1/1) ... [2021-11-13 18:45:31,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:31" (1/1) ... [2021-11-13 18:45:31,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:45:31,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:45:31,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:45:31,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:45:31,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:31" (1/1) ... [2021-11-13 18:45:31,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:45:31,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:31,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:45:31,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:45:31,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:45:31,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:45:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:45:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:45:31,735 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:45:31,735 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 18:45:31,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:45:31 BoogieIcfgContainer [2021-11-13 18:45:31,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:45:31,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:45:31,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:45:31,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:45:31,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:45:31" (1/3) ... [2021-11-13 18:45:31,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d5c831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:45:31, skipping insertion in model container [2021-11-13 18:45:31,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:31" (2/3) ... [2021-11-13 18:45:31,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d5c831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:45:31, skipping insertion in model container [2021-11-13 18:45:31,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:45:31" (3/3) ... [2021-11-13 18:45:31,746 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2021-11-13 18:45:31,758 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:45:31,758 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:45:31,808 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:45:31,814 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 [2021-11-13 18:45:31,815 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:45:31,829 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 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) [2021-11-13 18:45:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 18:45:31,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:31,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:31,836 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:31,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2021-11-13 18:45:31,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:31,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570471934] [2021-11-13 18:45:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:31,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:31,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:31,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570471934] [2021-11-13 18:45:31,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570471934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:31,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:31,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:45:31,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813377728] [2021-11-13 18:45:31,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:31,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:45:31,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:32,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:45:32,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:45:32,039 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-13 18:45:32,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:32,054 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-11-13 18:45:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:45:32,057 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-11-13 18:45:32,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:32,065 INFO L225 Difference]: With dead ends: 22 [2021-11-13 18:45:32,065 INFO L226 Difference]: Without dead ends: 9 [2021-11-13 18:45:32,068 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 [2021-11-13 18:45:32,073 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.47ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:32,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.47ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:45:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-13 18:45:32,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-13 18:45:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-11-13 18:45:32,112 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2021-11-13 18:45:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:32,113 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-11-13 18:45:32,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-13 18:45:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-11-13 18:45:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 18:45:32,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:32,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:32,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:45:32,115 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:32,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:32,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2021-11-13 18:45:32,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:32,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373826726] [2021-11-13 18:45:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:32,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:32,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:32,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373826726] [2021-11-13 18:45:32,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373826726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:32,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:32,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:45:32,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953899003] [2021-11-13 18:45:32,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:32,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:45:32,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:32,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:45:32,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:45:32,180 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-13 18:45:32,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:32,216 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2021-11-13 18:45:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:45:32,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-11-13 18:45:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:32,217 INFO L225 Difference]: With dead ends: 18 [2021-11-13 18:45:32,217 INFO L226 Difference]: Without dead ends: 11 [2021-11-13 18:45:32,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:45:32,220 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.65ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.13ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:32,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 9 Unknown, 0 Unchecked, 0.65ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 30.13ms Time] [2021-11-13 18:45:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-13 18:45:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-13 18:45:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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) [2021-11-13 18:45:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-13 18:45:32,225 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2021-11-13 18:45:32,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:32,225 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-13 18:45:32,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-13 18:45:32,225 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-13 18:45:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 18:45:32,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:32,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:32,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:45:32,227 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:32,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:32,228 INFO L85 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2021-11-13 18:45:32,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:32,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913377819] [2021-11-13 18:45:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:32,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:32,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:32,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913377819] [2021-11-13 18:45:32,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913377819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:32,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:32,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:45:32,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563955820] [2021-11-13 18:45:32,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:32,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:45:32,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:32,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:45:32,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:45:32,285 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-13 18:45:32,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:32,296 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-11-13 18:45:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:45:32,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-13 18:45:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:32,297 INFO L225 Difference]: With dead ends: 16 [2021-11-13 18:45:32,297 INFO L226 Difference]: Without dead ends: 12 [2021-11-13 18:45:32,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:45:32,300 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.47ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.81ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:32,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 6 Unknown, 0 Unchecked, 0.47ms Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 7.81ms Time] [2021-11-13 18:45:32,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-13 18:45:32,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-13 18:45:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-11-13 18:45:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-13 18:45:32,305 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-11-13 18:45:32,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:32,305 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-13 18:45:32,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-13 18:45:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-13 18:45:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:45:32,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:32,307 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:32,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:45:32,307 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:32,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:32,308 INFO L85 PathProgramCache]: Analyzing trace with hash 698628545, now seen corresponding path program 1 times [2021-11-13 18:45:32,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:32,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724461147] [2021-11-13 18:45:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:32,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:32,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:32,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724461147] [2021-11-13 18:45:32,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724461147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:32,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036705039] [2021-11-13 18:45:32,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:32,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:32,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:32,387 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:32,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:45:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:32,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:45:32,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:32,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:32,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036705039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:32,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:32,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-13 18:45:32,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170442076] [2021-11-13 18:45:32,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:32,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:45:32,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:32,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:45:32,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:45:32,559 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-11-13 18:45:32,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:32,595 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2021-11-13 18:45:32,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:45:32,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 10 [2021-11-13 18:45:32,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:32,597 INFO L225 Difference]: With dead ends: 25 [2021-11-13 18:45:32,597 INFO L226 Difference]: Without dead ends: 17 [2021-11-13 18:45:32,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:45:32,600 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.09ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.92ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:32,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 25 Unknown, 0 Unchecked, 1.09ms Time], IncrementalHoareTripleChecker [9 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 25.92ms Time] [2021-11-13 18:45:32,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-13 18:45:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-13 18:45:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2021-11-13 18:45:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-13 18:45:32,606 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2021-11-13 18:45:32,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:32,607 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-13 18:45:32,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-11-13 18:45:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-13 18:45:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 18:45:32,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:32,608 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:32,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:32,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-13 18:45:32,819 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:32,821 INFO L85 PathProgramCache]: Analyzing trace with hash -693598994, now seen corresponding path program 1 times [2021-11-13 18:45:32,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:32,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452330334] [2021-11-13 18:45:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:32,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:45:32,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:32,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452330334] [2021-11-13 18:45:32,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452330334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:32,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849003597] [2021-11-13 18:45:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:32,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:32,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:32,931 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:32,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:45:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:33,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:45:33,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:45:33,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:45:33,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849003597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:33,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:33,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-13 18:45:33,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462079254] [2021-11-13 18:45:33,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:33,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:45:33,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:33,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:45:33,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:45:33,218 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2021-11-13 18:45:33,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:33,271 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-11-13 18:45:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:45:33,272 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 16 [2021-11-13 18:45:33,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:33,273 INFO L225 Difference]: With dead ends: 36 [2021-11-13 18:45:33,273 INFO L226 Difference]: Without dead ends: 25 [2021-11-13 18:45:33,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:45:33,275 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.83ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:33,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 30 Unknown, 0 Unchecked, 0.83ms Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 43.16ms Time] [2021-11-13 18:45:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-13 18:45:33,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-13 18:45:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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) [2021-11-13 18:45:33,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-13 18:45:33,282 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-11-13 18:45:33,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:33,283 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-13 18:45:33,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2021-11-13 18:45:33,283 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-13 18:45:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 18:45:33,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:33,284 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:33,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:33,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:33,499 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:33,500 INFO L85 PathProgramCache]: Analyzing trace with hash 219186682, now seen corresponding path program 2 times [2021-11-13 18:45:33,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:33,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511745875] [2021-11-13 18:45:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:33,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:45:33,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:33,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511745875] [2021-11-13 18:45:33,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511745875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:33,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289178642] [2021-11-13 18:45:33,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:45:33,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:33,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:33,593 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:33,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:45:33,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:45:33,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:33,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:45:33,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:45:33,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:45:33,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289178642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:33,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:33,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-11-13 18:45:33,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023466015] [2021-11-13 18:45:33,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:33,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:45:33,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:33,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:45:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:45:33,913 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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) [2021-11-13 18:45:33,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:33,998 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-11-13 18:45:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:45:33,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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 [2021-11-13 18:45:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:34,005 INFO L225 Difference]: With dead ends: 52 [2021-11-13 18:45:34,005 INFO L226 Difference]: Without dead ends: 41 [2021-11-13 18:45:34,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:45:34,009 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.41ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:34,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 61 Unknown, 0 Unchecked, 2.41ms Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 59.73ms Time] [2021-11-13 18:45:34,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-13 18:45:34,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-13 18:45:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 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) [2021-11-13 18:45:34,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-11-13 18:45:34,028 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 24 [2021-11-13 18:45:34,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:34,029 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-11-13 18:45:34,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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) [2021-11-13 18:45:34,029 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-11-13 18:45:34,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 18:45:34,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:34,031 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:34,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:34,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:34,255 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:34,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1801004050, now seen corresponding path program 3 times [2021-11-13 18:45:34,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:34,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025956699] [2021-11-13 18:45:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:34,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:45:34,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:34,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025956699] [2021-11-13 18:45:34,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025956699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:34,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317391597] [2021-11-13 18:45:34,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:45:34,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:34,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:34,494 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:34,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:45:34,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 18:45:34,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:34,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:45:34,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-13 18:45:34,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-13 18:45:35,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317391597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:35,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:35,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2021-11-13 18:45:35,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175973031] [2021-11-13 18:45:35,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:35,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:45:35,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:35,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:45:35,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:45:35,047 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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) [2021-11-13 18:45:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:35,416 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-11-13 18:45:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 18:45:35,417 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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 40 [2021-11-13 18:45:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:35,418 INFO L225 Difference]: With dead ends: 64 [2021-11-13 18:45:35,418 INFO L226 Difference]: Without dead ends: 53 [2021-11-13 18:45:35,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 18:45:35,420 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.75ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.34ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:35,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 26 Invalid, 129 Unknown, 0 Unchecked, 2.75ms Time], IncrementalHoareTripleChecker [45 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 115.34ms Time] [2021-11-13 18:45:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-13 18:45:35,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-11-13 18:45:35,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 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) [2021-11-13 18:45:35,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-11-13 18:45:35,437 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2021-11-13 18:45:35,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:35,437 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-11-13 18:45:35,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 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) [2021-11-13 18:45:35,438 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-11-13 18:45:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 18:45:35,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:35,442 INFO L514 BasicCegarLoop]: trace histogram [17, 15, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:35,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:35,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:35,643 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:35,643 INFO L85 PathProgramCache]: Analyzing trace with hash 842950389, now seen corresponding path program 4 times [2021-11-13 18:45:35,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:35,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141858654] [2021-11-13 18:45:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:35,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:45:35,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:35,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141858654] [2021-11-13 18:45:35,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141858654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:35,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881507220] [2021-11-13 18:45:35,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:45:35,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:35,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:35,944 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:35,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:45:36,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:45:36,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:36,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:45:36,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:45:36,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:45:36,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881507220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:36,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:36,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2021-11-13 18:45:36,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475652307] [2021-11-13 18:45:36,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:36,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-13 18:45:36,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:36,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-13 18:45:36,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:45:36,651 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 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) [2021-11-13 18:45:36,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:36,785 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2021-11-13 18:45:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-13 18:45:36,786 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 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 46 [2021-11-13 18:45:36,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:36,791 INFO L225 Difference]: With dead ends: 96 [2021-11-13 18:45:36,791 INFO L226 Difference]: Without dead ends: 81 [2021-11-13 18:45:36,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:45:36,793 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.70ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:36,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 106 Unknown, 0 Unchecked, 1.70ms Time], IncrementalHoareTripleChecker [18 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 98.56ms Time] [2021-11-13 18:45:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-13 18:45:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-13 18:45:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 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) [2021-11-13 18:45:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-11-13 18:45:36,818 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 46 [2021-11-13 18:45:36,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:36,819 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-11-13 18:45:36,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 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) [2021-11-13 18:45:36,820 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-11-13 18:45:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-13 18:45:36,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:36,828 INFO L514 BasicCegarLoop]: trace histogram [34, 32, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:36,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:37,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:37,043 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:37,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:37,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1726294200, now seen corresponding path program 5 times [2021-11-13 18:45:37,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:37,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334607755] [2021-11-13 18:45:37,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:37,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:45:37,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:37,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334607755] [2021-11-13 18:45:37,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334607755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:37,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217091770] [2021-11-13 18:45:37,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:45:37,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:37,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:37,771 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:37,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:45:37,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-11-13 18:45:37,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:37,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-13 18:45:37,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:45:38,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:45:39,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217091770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:39,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:39,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2021-11-13 18:45:39,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390490773] [2021-11-13 18:45:39,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:39,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-13 18:45:39,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:39,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-13 18:45:39,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-13 18:45:39,694 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 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) [2021-11-13 18:45:39,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:39,968 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2021-11-13 18:45:39,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-13 18:45:39,968 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 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 80 [2021-11-13 18:45:39,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:39,970 INFO L225 Difference]: With dead ends: 164 [2021-11-13 18:45:39,970 INFO L226 Difference]: Without dead ends: 149 [2021-11-13 18:45:39,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-13 18:45:39,973 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.05ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 179.37ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:39,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 187 Unknown, 0 Unchecked, 3.05ms Time], IncrementalHoareTripleChecker [39 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 179.37ms Time] [2021-11-13 18:45:39,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-13 18:45:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-11-13 18:45:40,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 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) [2021-11-13 18:45:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2021-11-13 18:45:40,001 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 80 [2021-11-13 18:45:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:40,002 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2021-11-13 18:45:40,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 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) [2021-11-13 18:45:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2021-11-13 18:45:40,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 18:45:40,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:40,005 INFO L514 BasicCegarLoop]: trace histogram [68, 66, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:40,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:40,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:40,231 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:40,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:40,231 INFO L85 PathProgramCache]: Analyzing trace with hash 439839150, now seen corresponding path program 6 times [2021-11-13 18:45:40,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:40,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851032988] [2021-11-13 18:45:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:40,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:45:42,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:42,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851032988] [2021-11-13 18:45:42,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851032988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:42,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864440426] [2021-11-13 18:45:42,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:45:42,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:42,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:42,264 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:42,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:45:42,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-13 18:45:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:42,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:45:42,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 202 proven. 15 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2021-11-13 18:45:43,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 202 proven. 15 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2021-11-13 18:45:43,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864440426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:43,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:43,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 8, 8] total 81 [2021-11-13 18:45:43,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774652589] [2021-11-13 18:45:43,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:43,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-13 18:45:43,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:43,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-13 18:45:43,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2436, Invalid=4044, Unknown=0, NotChecked=0, Total=6480 [2021-11-13 18:45:43,971 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 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) [2021-11-13 18:45:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:46,479 INFO L93 Difference]: Finished difference Result 179 states and 196 transitions. [2021-11-13 18:45:46,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-13 18:45:46,479 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 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 148 [2021-11-13 18:45:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:46,481 INFO L225 Difference]: With dead ends: 179 [2021-11-13 18:45:46,481 INFO L226 Difference]: Without dead ends: 164 [2021-11-13 18:45:46,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3106 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7729, Invalid=14027, Unknown=0, NotChecked=0, Total=21756 [2021-11-13 18:45:46,490 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 213 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 219.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.74ms SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 265.66ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:46,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 36 Invalid, 406 Unknown, 0 Unchecked, 3.74ms Time], IncrementalHoareTripleChecker [217 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 265.66ms Time] [2021-11-13 18:45:46,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-13 18:45:46,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 158. [2021-11-13 18:45:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0254777070063694) internal successors, (161), 157 states have internal predecessors, (161), 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) [2021-11-13 18:45:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2021-11-13 18:45:46,514 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 148 [2021-11-13 18:45:46,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:46,515 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2021-11-13 18:45:46,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 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) [2021-11-13 18:45:46,516 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2021-11-13 18:45:46,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-13 18:45:46,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:46,526 INFO L514 BasicCegarLoop]: trace histogram [69, 67, 12, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:46,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:46,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 18:45:46,747 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:46,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:46,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1679521733, now seen corresponding path program 7 times [2021-11-13 18:45:46,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:46,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930935156] [2021-11-13 18:45:46,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:46,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 18:45:48,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:48,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930935156] [2021-11-13 18:45:48,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930935156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:48,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264054130] [2021-11-13 18:45:48,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:45:48,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:48,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:48,552 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:48,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:45:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:48,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-13 18:45:48,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 18:45:49,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 18:45:54,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264054130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:54,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:54,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2021-11-13 18:45:54,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980964301] [2021-11-13 18:45:54,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:54,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-11-13 18:45:54,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:54,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-11-13 18:45:54,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2021-11-13 18:45:54,035 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 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) [2021-11-13 18:45:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:54,621 INFO L93 Difference]: Finished difference Result 318 states and 393 transitions. [2021-11-13 18:45:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-11-13 18:45:54,622 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 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 157 [2021-11-13 18:45:54,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:54,624 INFO L225 Difference]: With dead ends: 318 [2021-11-13 18:45:54,624 INFO L226 Difference]: Without dead ends: 296 [2021-11-13 18:45:54,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2021-11-13 18:45:54,627 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 242.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.53ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 307.02ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:54,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 378 Unknown, 0 Unchecked, 4.53ms Time], IncrementalHoareTripleChecker [78 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 307.02ms Time] [2021-11-13 18:45:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-13 18:45:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-11-13 18:45:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.0135593220338983) internal successors, (299), 295 states have internal predecessors, (299), 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) [2021-11-13 18:45:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 299 transitions. [2021-11-13 18:45:54,652 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 299 transitions. Word has length 157 [2021-11-13 18:45:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:54,653 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 299 transitions. [2021-11-13 18:45:54,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 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) [2021-11-13 18:45:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 299 transitions. [2021-11-13 18:45:54,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-11-13 18:45:54,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:54,658 INFO L514 BasicCegarLoop]: trace histogram [138, 136, 12, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:54,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:54,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 18:45:54,887 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:54,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:54,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1112962452, now seen corresponding path program 8 times [2021-11-13 18:45:54,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:54,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371579467] [2021-11-13 18:45:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:54,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 18:46:01,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:01,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371579467] [2021-11-13 18:46:01,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371579467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:01,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001044687] [2021-11-13 18:46:01,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:46:01,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:01,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:01,514 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:01,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:46:01,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:46:01,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:01,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 138 conjunts are in the unsatisfiable core [2021-11-13 18:46:01,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 18:46:02,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 18:46:23,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001044687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:23,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:46:23,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2021-11-13 18:46:23,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800372760] [2021-11-13 18:46:23,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:23,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2021-11-13 18:46:23,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:23,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2021-11-13 18:46:23,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2021-11-13 18:46:23,929 INFO L87 Difference]: Start difference. First operand 296 states and 299 transitions. Second operand has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 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) [2021-11-13 18:46:26,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:26,042 INFO L93 Difference]: Finished difference Result 594 states and 738 transitions. [2021-11-13 18:46:26,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2021-11-13 18:46:26,046 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 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 295 [2021-11-13 18:46:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:26,049 INFO L225 Difference]: With dead ends: 594 [2021-11-13 18:46:26,050 INFO L226 Difference]: Without dead ends: 572 [2021-11-13 18:46:26,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2021-11-13 18:46:26,057 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 508.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.89ms SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 748.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:26,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 716 Unknown, 0 Unchecked, 7.89ms Time], IncrementalHoareTripleChecker [142 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 748.43ms Time] [2021-11-13 18:46:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-13 18:46:26,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2021-11-13 18:46:26,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 1.0070052539404553) internal successors, (575), 571 states have internal predecessors, (575), 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) [2021-11-13 18:46:26,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 575 transitions. [2021-11-13 18:46:26,097 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 575 transitions. Word has length 295 [2021-11-13 18:46:26,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:26,098 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 575 transitions. [2021-11-13 18:46:26,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 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) [2021-11-13 18:46:26,099 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 575 transitions. [2021-11-13 18:46:26,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2021-11-13 18:46:26,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:26,115 INFO L514 BasicCegarLoop]: trace histogram [276, 274, 12, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:26,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:26,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 18:46:26,343 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:26,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:26,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1556540658, now seen corresponding path program 9 times [2021-11-13 18:46:26,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:26,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789692696] [2021-11-13 18:46:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:26,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 18:46:55,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:55,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789692696] [2021-11-13 18:46:55,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789692696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:55,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923411992] [2021-11-13 18:46:55,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:46:55,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:55,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:55,557 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:55,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:46:55,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-13 18:46:55,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:55,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:46:55,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74880 trivial. 0 not checked. [2021-11-13 18:46:57,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74880 trivial. 0 not checked. [2021-11-13 18:46:58,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923411992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:58,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:46:58,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 5, 5] total 283 [2021-11-13 18:46:58,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391504924] [2021-11-13 18:46:58,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:58,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 283 states [2021-11-13 18:46:58,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:58,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 283 interpolants. [2021-11-13 18:46:58,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39903, Invalid=39903, Unknown=0, NotChecked=0, Total=79806 [2021-11-13 18:46:58,771 INFO L87 Difference]: Start difference. First operand 572 states and 575 transitions. Second operand has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 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) [2021-11-13 18:47:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:01,408 INFO L93 Difference]: Finished difference Result 604 states and 619 transitions. [2021-11-13 18:47:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 283 states. [2021-11-13 18:47:01,409 INFO L78 Accepts]: Start accepts. Automaton has has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 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 571 [2021-11-13 18:47:01,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:01,415 INFO L225 Difference]: With dead ends: 604 [2021-11-13 18:47:01,415 INFO L226 Difference]: Without dead ends: 582 [2021-11-13 18:47:01,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1417 GetRequests, 1136 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=39903, Invalid=39903, Unknown=0, NotChecked=0, Total=79806 [2021-11-13 18:47:01,422 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 281 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 603.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.20ms SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 819.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:01,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 52 Invalid, 1177 Unknown, 0 Unchecked, 12.20ms Time], IncrementalHoareTripleChecker [572 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 819.00ms Time] [2021-11-13 18:47:01,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-13 18:47:01,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2021-11-13 18:47:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.0137693631669535) internal successors, (589), 581 states have internal predecessors, (589), 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) [2021-11-13 18:47:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 589 transitions. [2021-11-13 18:47:01,467 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 589 transitions. Word has length 571 [2021-11-13 18:47:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:01,469 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 589 transitions. [2021-11-13 18:47:01,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 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) [2021-11-13 18:47:01,470 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 589 transitions. [2021-11-13 18:47:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2021-11-13 18:47:01,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:01,489 INFO L514 BasicCegarLoop]: trace histogram [281, 275, 12, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:01,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:01,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:47:01,703 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:01,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1493468617, now seen corresponding path program 10 times [2021-11-13 18:47:01,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:01,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440699548] [2021-11-13 18:47:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:01,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-13 18:47:33,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:33,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440699548] [2021-11-13 18:47:33,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440699548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:33,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072481202] [2021-11-13 18:47:33,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:47:33,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:33,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:33,379 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:33,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:47:33,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:47:33,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:33,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 277 conjunts are in the unsatisfiable core [2021-11-13 18:47:33,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-13 18:47:35,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-13 18:49:00,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072481202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:00,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:00,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 278, 278] total 555 [2021-11-13 18:49:00,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101318883] [2021-11-13 18:49:00,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:00,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 555 states [2021-11-13 18:49:00,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:00,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 555 interpolants. [2021-11-13 18:49:00,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2021-11-13 18:49:00,192 INFO L87 Difference]: Start difference. First operand 582 states and 589 transitions. Second operand has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 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) [2021-11-13 18:49:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:09,069 INFO L93 Difference]: Finished difference Result 1166 states and 1457 transitions. [2021-11-13 18:49:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 554 states. [2021-11-13 18:49:09,071 INFO L78 Accepts]: Start accepts. Automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 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 581 [2021-11-13 18:49:09,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:09,077 INFO L225 Difference]: With dead ends: 1166 [2021-11-13 18:49:09,078 INFO L226 Difference]: Without dead ends: 1136 [2021-11-13 18:49:09,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1438 GetRequests, 885 SyntacticMatches, 0 SemanticMatches, 553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 113.8s TimeCoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2021-11-13 18:49:09,094 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 832.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.55ms SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1130.83ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:09,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 1430 Unknown, 0 Unchecked, 10.55ms Time], IncrementalHoareTripleChecker [284 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 1130.83ms Time] [2021-11-13 18:49:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-11-13 18:49:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2021-11-13 18:49:09,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 1.0070484581497798) internal successors, (1143), 1135 states have internal predecessors, (1143), 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) [2021-11-13 18:49:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1143 transitions. [2021-11-13 18:49:09,156 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1143 transitions. Word has length 581 [2021-11-13 18:49:09,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:09,157 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1143 transitions. [2021-11-13 18:49:09,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 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) [2021-11-13 18:49:09,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1143 transitions. [2021-11-13 18:49:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1136 [2021-11-13 18:49:09,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:09,171 INFO L514 BasicCegarLoop]: trace histogram [558, 552, 12, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:09,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:09,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:09,394 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:09,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:09,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1969744632, now seen corresponding path program 11 times [2021-11-13 18:49:09,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:09,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594746319] [2021-11-13 18:49:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:09,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 311442 backedges. 6083 proven. 305256 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-13 18:51:04,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:04,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594746319] [2021-11-13 18:51:04,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594746319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:04,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654349336] [2021-11-13 18:51:04,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:51:04,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:04,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:04,030 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:04,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_070030b0-f8ae-4ea3-98a7-2142f652bf88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:51:06,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 559 check-sat command(s) [2021-11-13 18:51:06,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:06,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 2350 conjuncts, 554 conjunts are in the unsatisfiable core [2021-11-13 18:51:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 311442 backedges. 6083 proven. 305256 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-13 18:51:09,394 INFO L328 TraceCheckSpWp]: Computing backward predicates...