./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/break-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-lopstr16/break-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL --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 af12e42a5d3a022d66b7920ff01dec158b3de4df470747e943653bc7f1da2cc9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:27:05,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:27:05,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:27:05,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:27:05,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:27:05,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:27:05,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:27:05,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:27:05,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:27:05,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:27:05,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:27:05,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:27:05,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:27:05,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:27:05,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:27:05,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:27:05,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:27:05,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:27:05,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:27:05,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:27:05,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:27:05,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:27:05,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:27:05,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:27:05,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:27:05,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:27:05,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:27:05,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:27:05,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:27:05,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:27:05,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:27:05,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:27:05,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:27:05,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:27:05,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:27:05,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:27:05,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:27:05,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:27:05,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:27:05,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:27:05,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:27:05,161 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:27:05,219 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:27:05,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:27:05,224 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:27:05,224 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:27:05,233 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:27:05,234 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:27:05,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:27:05,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:27:05,235 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:27:05,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:27:05,237 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:27:05,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:27:05,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:27:05,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:27:05,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:27:05,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:27:05,239 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:27:05,239 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:27:05,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:27:05,240 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:27:05,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:27:05,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:27:05,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:27:05,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:27:05,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:27:05,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:27:05,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:27:05,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:27:05,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:27:05,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:27:05,245 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:27:05,246 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:27:05,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:27:05,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:27:05,247 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_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af12e42a5d3a022d66b7920ff01dec158b3de4df470747e943653bc7f1da2cc9 [2021-11-19 05:27:05,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:27:05,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:27:05,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:27:05,640 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:27:05,642 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:27:05,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-lopstr16/break-2.i [2021-11-19 05:27:05,752 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/data/86ec6abe4/920dbb896d9f47b1b66d96574c25212f/FLAG87c646d1e [2021-11-19 05:27:06,332 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:27:06,333 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/sv-benchmarks/c/array-lopstr16/break-2.i [2021-11-19 05:27:06,348 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/data/86ec6abe4/920dbb896d9f47b1b66d96574c25212f/FLAG87c646d1e [2021-11-19 05:27:06,671 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/data/86ec6abe4/920dbb896d9f47b1b66d96574c25212f [2021-11-19 05:27:06,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:27:06,677 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:27:06,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:27:06,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:27:06,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:27:06,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:27:06" (1/1) ... [2021-11-19 05:27:06,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a5b88b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:06, skipping insertion in model container [2021-11-19 05:27:06,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:27:06" (1/1) ... [2021-11-19 05:27:06,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:27:06,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:27:06,927 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/sv-benchmarks/c/array-lopstr16/break-2.i[800,813] [2021-11-19 05:27:06,958 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:27:15,924 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:27:15,940 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/sv-benchmarks/c/array-lopstr16/break-2.i[800,813] [2021-11-19 05:27:15,945 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:27:15,968 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:27:15,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:15 WrapperNode [2021-11-19 05:27:15,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:27:15,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:27:15,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:27:15,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:27:15,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:15" (1/1) ... [2021-11-19 05:27:15,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:15" (1/1) ... [2021-11-19 05:27:16,017 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2021-11-19 05:27:16,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:27:16,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:27:16,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:27:16,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:27:16,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:15" (1/1) ... [2021-11-19 05:27:16,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:15" (1/1) ... [2021-11-19 05:27:16,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:15" (1/1) ... [2021-11-19 05:27:16,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:15" (1/1) ... [2021-11-19 05:27:16,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:15" (1/1) ... [2021-11-19 05:27:16,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:15" (1/1) ... [2021-11-19 05:27:16,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:15" (1/1) ... [2021-11-19 05:27:16,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:27:16,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:27:16,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:27:16,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:27:16,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:15" (1/1) ... [2021-11-19 05:27:16,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:27:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:16,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:27:16,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:27:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:27:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:27:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:27:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:27:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:27:16,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:27:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:27:16,275 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:27:16,277 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:27:16,453 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:27:16,461 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:27:16,461 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 05:27:16,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:27:16 BoogieIcfgContainer [2021-11-19 05:27:16,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:27:16,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:27:16,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:27:16,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:27:16,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:27:06" (1/3) ... [2021-11-19 05:27:16,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d732dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:27:16, skipping insertion in model container [2021-11-19 05:27:16,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:15" (2/3) ... [2021-11-19 05:27:16,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d732dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:27:16, skipping insertion in model container [2021-11-19 05:27:16,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:27:16" (3/3) ... [2021-11-19 05:27:16,474 INFO L111 eAbstractionObserver]: Analyzing ICFG break-2.i [2021-11-19 05:27:16,481 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:27:16,481 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:27:16,540 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:27:16,550 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 [2021-11-19 05:27:16,551 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:27:16,567 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 05:27:16,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:16,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:16,576 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:16,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:16,582 INFO L85 PathProgramCache]: Analyzing trace with hash 531796522, now seen corresponding path program 1 times [2021-11-19 05:27:16,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:16,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771712816] [2021-11-19 05:27:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:16,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:16,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:16,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771712816] [2021-11-19 05:27:16,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771712816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:16,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:16,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:27:16,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331824846] [2021-11-19 05:27:16,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:16,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 05:27:16,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:16,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 05:27:16,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 05:27:16,838 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-19 05:27:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:16,856 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-19 05:27:16,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 05:27:16,859 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-11-19 05:27:16,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:16,868 INFO L225 Difference]: With dead ends: 29 [2021-11-19 05:27:16,869 INFO L226 Difference]: Without dead ends: 13 [2021-11-19 05:27:16,872 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 [2021-11-19 05:27:16,877 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:16,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:27:16,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-19 05:27:16,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-19 05:27:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:16,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-19 05:27:16,918 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-11-19 05:27:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:16,919 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-19 05:27:16,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-19 05:27:16,919 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-19 05:27:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 05:27:16,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:16,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:16,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:27:16,921 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:16,922 INFO L85 PathProgramCache]: Analyzing trace with hash 216875861, now seen corresponding path program 1 times [2021-11-19 05:27:16,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:16,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399499388] [2021-11-19 05:27:16,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:16,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:16,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:16,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399499388] [2021-11-19 05:27:16,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399499388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:16,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:16,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:27:16,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303982139] [2021-11-19 05:27:16,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:16,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:27:16,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:16,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:27:16,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:27:16,978 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-19 05:27:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:17,017 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-11-19 05:27:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:27:17,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-11-19 05:27:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:17,019 INFO L225 Difference]: With dead ends: 31 [2021-11-19 05:27:17,019 INFO L226 Difference]: Without dead ends: 23 [2021-11-19 05:27:17,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:27:17,024 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:17,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 15 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:27:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-19 05:27:17,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2021-11-19 05:27:17,036 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) [2021-11-19 05:27:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-19 05:27:17,038 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 8 [2021-11-19 05:27:17,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:17,038 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-19 05:27:17,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-19 05:27:17,039 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-19 05:27:17,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 05:27:17,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:17,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:17,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:27:17,040 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:17,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1665715163, now seen corresponding path program 1 times [2021-11-19 05:27:17,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:17,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314300638] [2021-11-19 05:27:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:17,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:17,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:17,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314300638] [2021-11-19 05:27:17,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314300638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:17,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609469356] [2021-11-19 05:27:17,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:17,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:17,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:17,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:17,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:27:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:17,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:27:17,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:17,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:27:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:17,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609469356] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:27:17,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:27:17,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-19 05:27:17,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741223143] [2021-11-19 05:27:17,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:27:17,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:27:17,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:17,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:27:17,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:27:17,401 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-11-19 05:27:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:17,532 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-11-19 05:27:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:27:17,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-19 05:27:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:17,534 INFO L225 Difference]: With dead ends: 50 [2021-11-19 05:27:17,534 INFO L226 Difference]: Without dead ends: 40 [2021-11-19 05:27:17,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:27:17,537 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:17,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 18 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:27:17,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-19 05:27:17,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2021-11-19 05:27:17,548 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) [2021-11-19 05:27:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-19 05:27:17,549 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2021-11-19 05:27:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:17,549 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-19 05:27:17,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-11-19 05:27:17,550 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-19 05:27:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 05:27:17,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:17,551 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:17,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:17,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:17,752 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:17,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:17,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1774448108, now seen corresponding path program 1 times [2021-11-19 05:27:17,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:17,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266412225] [2021-11-19 05:27:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:17,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:17,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:17,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266412225] [2021-11-19 05:27:17,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266412225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:17,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252232403] [2021-11-19 05:27:17,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:17,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:17,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:17,949 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:17,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:27:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:18,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:27:18,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:18,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:27:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:18,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252232403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:27:18,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:27:18,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2021-11-19 05:27:18,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053798669] [2021-11-19 05:27:18,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:27:18,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 05:27:18,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:18,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 05:27:18,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:27:18,205 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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) [2021-11-19 05:27:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:18,720 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-11-19 05:27:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 05:27:18,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-19 05:27:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:18,725 INFO L225 Difference]: With dead ends: 81 [2021-11-19 05:27:18,725 INFO L226 Difference]: Without dead ends: 66 [2021-11-19 05:27:18,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=647, Unknown=0, NotChecked=0, Total=930 [2021-11-19 05:27:18,733 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 161 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:18,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 44 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:27:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-19 05:27:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-11-19 05:27:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 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) [2021-11-19 05:27:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-11-19 05:27:18,759 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 15 [2021-11-19 05:27:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:18,760 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-11-19 05:27:18,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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) [2021-11-19 05:27:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-11-19 05:27:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 05:27:18,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:18,761 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:18,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-19 05:27:18,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:18,963 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:18,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1157744319, now seen corresponding path program 1 times [2021-11-19 05:27:18,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:18,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950431750] [2021-11-19 05:27:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:18,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:27:19,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:19,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950431750] [2021-11-19 05:27:19,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950431750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:19,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872388858] [2021-11-19 05:27:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:19,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:19,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:19,136 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:19,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:27:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:19,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:27:19,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:27:19,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:27:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:27:19,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872388858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:27:19,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:27:19,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-11-19 05:27:19,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866678249] [2021-11-19 05:27:19,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:27:19,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 05:27:19,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:19,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 05:27:19,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:27:19,602 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2021-11-19 05:27:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:19,811 INFO L93 Difference]: Finished difference Result 181 states and 204 transitions. [2021-11-19 05:27:19,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 05:27:19,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 32 [2021-11-19 05:27:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:19,818 INFO L225 Difference]: With dead ends: 181 [2021-11-19 05:27:19,818 INFO L226 Difference]: Without dead ends: 146 [2021-11-19 05:27:19,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:27:19,821 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 231 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:19,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 63 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:27:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-19 05:27:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2021-11-19 05:27:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.125) internal successors, (135), 120 states have internal predecessors, (135), 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) [2021-11-19 05:27:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2021-11-19 05:27:19,863 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 32 [2021-11-19 05:27:19,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:19,864 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2021-11-19 05:27:19,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2021-11-19 05:27:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2021-11-19 05:27:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 05:27:19,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:19,871 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:19,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:20,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:20,096 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:20,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1792167871, now seen corresponding path program 2 times [2021-11-19 05:27:20,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:20,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026460205] [2021-11-19 05:27:20,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:20,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:27:20,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:20,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026460205] [2021-11-19 05:27:20,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026460205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:20,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932483185] [2021-11-19 05:27:20,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:27:20,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:20,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:20,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:20,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:27:20,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:27:20,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:27:20,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 05:27:20,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:27:21,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:27:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:27:21,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932483185] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:27:21,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:27:21,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-11-19 05:27:21,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606321162] [2021-11-19 05:27:21,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:27:21,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 05:27:21,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:21,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 05:27:21,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 05:27:21,667 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 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) [2021-11-19 05:27:22,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:22,108 INFO L93 Difference]: Finished difference Result 381 states and 428 transitions. [2021-11-19 05:27:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:27:22,110 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 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 56 [2021-11-19 05:27:22,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:22,113 INFO L225 Difference]: With dead ends: 381 [2021-11-19 05:27:22,113 INFO L226 Difference]: Without dead ends: 306 [2021-11-19 05:27:22,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 05:27:22,119 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 651 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:22,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 128 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:27:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-19 05:27:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 249. [2021-11-19 05:27:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.125) internal successors, (279), 248 states have internal predecessors, (279), 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) [2021-11-19 05:27:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 279 transitions. [2021-11-19 05:27:22,171 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 279 transitions. Word has length 56 [2021-11-19 05:27:22,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:22,171 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 279 transitions. [2021-11-19 05:27:22,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 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) [2021-11-19 05:27:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 279 transitions. [2021-11-19 05:27:22,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 05:27:22,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:22,176 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:22,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:22,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 05:27:22,400 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:22,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash -485334593, now seen corresponding path program 3 times [2021-11-19 05:27:22,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:22,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840487983] [2021-11-19 05:27:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:22,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:27:23,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:23,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840487983] [2021-11-19 05:27:23,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840487983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:23,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115319350] [2021-11-19 05:27:23,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:27:23,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:23,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:23,196 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:23,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:27:33,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-11-19 05:27:33,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:27:33,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 05:27:33,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:27:34,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:27:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:27:36,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115319350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:27:36,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:27:36,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2021-11-19 05:27:36,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126610355] [2021-11-19 05:27:36,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:27:36,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-19 05:27:36,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:36,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-19 05:27:36,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-11-19 05:27:36,144 INFO L87 Difference]: Start difference. First operand 249 states and 279 transitions. Second operand has 65 states, 65 states have (on average 3.0615384615384613) internal successors, (199), 65 states have internal predecessors, (199), 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) [2021-11-19 05:27:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:37,866 INFO L93 Difference]: Finished difference Result 781 states and 876 transitions. [2021-11-19 05:27:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-19 05:27:37,867 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.0615384615384613) internal successors, (199), 65 states have internal predecessors, (199), 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 104 [2021-11-19 05:27:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:37,872 INFO L225 Difference]: With dead ends: 781 [2021-11-19 05:27:37,873 INFO L226 Difference]: Without dead ends: 626 [2021-11-19 05:27:37,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-11-19 05:27:37,878 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1326 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:37,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1326 Valid, 261 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 05:27:37,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-19 05:27:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 505. [2021-11-19 05:27:37,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.125) internal successors, (567), 504 states have internal predecessors, (567), 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) [2021-11-19 05:27:37,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 567 transitions. [2021-11-19 05:27:37,915 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 567 transitions. Word has length 104 [2021-11-19 05:27:37,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:37,916 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 567 transitions. [2021-11-19 05:27:37,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.0615384615384613) internal successors, (199), 65 states have internal predecessors, (199), 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) [2021-11-19 05:27:37,916 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 567 transitions. [2021-11-19 05:27:37,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-19 05:27:37,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:37,920 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:37,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:38,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:38,121 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:38,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:38,122 INFO L85 PathProgramCache]: Analyzing trace with hash -502364737, now seen corresponding path program 4 times [2021-11-19 05:27:38,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:38,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312246781] [2021-11-19 05:27:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:38,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5800 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:27:40,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:40,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312246781] [2021-11-19 05:27:40,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312246781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:40,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368079153] [2021-11-19 05:27:40,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:27:40,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:40,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:40,642 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:40,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:27:40,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:27:40,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:27:40,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-19 05:27:40,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5800 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:27:41,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:27:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5800 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:27:47,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368079153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:27:47,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:27:47,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2021-11-19 05:27:47,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126916956] [2021-11-19 05:27:47,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:27:47,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-11-19 05:27:47,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:47,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-11-19 05:27:47,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2021-11-19 05:27:47,292 INFO L87 Difference]: Start difference. First operand 505 states and 567 transitions. Second operand has 129 states, 129 states have (on average 3.0310077519379846) internal successors, (391), 129 states have internal predecessors, (391), 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) [2021-11-19 05:27:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:54,893 INFO L93 Difference]: Finished difference Result 1581 states and 1772 transitions. [2021-11-19 05:27:54,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-11-19 05:27:54,893 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.0310077519379846) internal successors, (391), 129 states have internal predecessors, (391), 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 200 [2021-11-19 05:27:54,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:54,902 INFO L225 Difference]: With dead ends: 1581 [2021-11-19 05:27:54,902 INFO L226 Difference]: Without dead ends: 1266 [2021-11-19 05:27:54,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2021-11-19 05:27:54,910 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 3521 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3521 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:54,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3521 Valid, 517 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 05:27:54,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2021-11-19 05:27:54,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1017. [2021-11-19 05:27:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 1.125) internal successors, (1143), 1016 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) [2021-11-19 05:27:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1143 transitions. [2021-11-19 05:27:54,949 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1143 transitions. Word has length 200 [2021-11-19 05:27:54,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:54,950 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 1143 transitions. [2021-11-19 05:27:54,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.0310077519379846) internal successors, (391), 129 states have internal predecessors, (391), 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) [2021-11-19 05:27:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1143 transitions. [2021-11-19 05:27:54,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-19 05:27:54,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:54,960 INFO L514 BasicCegarLoop]: trace histogram [127, 126, 126, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:54,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:55,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:55,176 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:55,177 INFO L85 PathProgramCache]: Analyzing trace with hash -101265985, now seen corresponding path program 5 times [2021-11-19 05:27:55,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:55,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590114046] [2021-11-19 05:27:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:55,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 23880 backedges. 0 proven. 23877 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:28:02,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:02,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590114046] [2021-11-19 05:28:02,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590114046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:02,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020183459] [2021-11-19 05:28:02,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:28:02,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:02,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:02,130 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:02,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2d515bc-9928-40d8-b313-67a61f1baeb6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process