./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/mapavg1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/mapavg1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9597042154fc2fc3c1808d4beed7ae6070061c42e65231c1781a660590e51714 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:41:29,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:41:29,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:41:29,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:41:29,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:41:29,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:41:29,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:41:29,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:41:29,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:41:29,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:41:29,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:41:29,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:41:29,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:41:29,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:41:29,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:41:29,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:41:29,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:41:29,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:41:29,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:41:29,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:41:29,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:41:29,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:41:29,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:41:29,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:41:29,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:41:29,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:41:29,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:41:29,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:41:29,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:41:29,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:41:29,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:41:29,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:41:29,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:41:29,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:41:29,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:41:29,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:41:29,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:41:29,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:41:29,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:41:29,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:41:29,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:41:29,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:41:29,400 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:41:29,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:41:29,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:41:29,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:41:29,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:41:29,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:41:29,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:41:29,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:41:29,419 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:41:29,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:41:29,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:41:29,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:41:29,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:41:29,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:41:29,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:41:29,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:41:29,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:41:29,423 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:41:29,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:41:29,423 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:41:29,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:41:29,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:41:29,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:41:29,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:41:29,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:41:29,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:41:29,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:41:29,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:41:29,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:41:29,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:41:29,428 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:41:29,428 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:41:29,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:41:29,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:41:29,429 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_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9597042154fc2fc3c1808d4beed7ae6070061c42e65231c1781a660590e51714 [2021-11-13 18:41:29,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:41:29,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:41:29,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:41:29,736 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:41:29,737 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:41:29,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-crafted/mapavg1.i [2021-11-13 18:41:29,816 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/data/9540df4eb/97d66c8eeb264cc0ba05edbde0f142e1/FLAGe2e2751ea [2021-11-13 18:41:30,333 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:41:30,335 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/sv-benchmarks/c/array-crafted/mapavg1.i [2021-11-13 18:41:30,345 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/data/9540df4eb/97d66c8eeb264cc0ba05edbde0f142e1/FLAGe2e2751ea [2021-11-13 18:41:30,683 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/data/9540df4eb/97d66c8eeb264cc0ba05edbde0f142e1 [2021-11-13 18:41:30,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:41:30,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:41:30,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:41:30,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:41:30,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:41:30,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:41:30" (1/1) ... [2021-11-13 18:41:30,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79bba5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:30, skipping insertion in model container [2021-11-13 18:41:30,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:41:30" (1/1) ... [2021-11-13 18:41:30,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:41:30,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:41:30,904 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/sv-benchmarks/c/array-crafted/mapavg1.i[1306,1319] [2021-11-13 18:41:30,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:41:30,915 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:41:30,937 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/sv-benchmarks/c/array-crafted/mapavg1.i[1306,1319] [2021-11-13 18:41:30,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:41:30,952 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:41:30,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:30 WrapperNode [2021-11-13 18:41:30,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:41:30,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:41:30,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:41:30,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:41:30,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:30" (1/1) ... [2021-11-13 18:41:30,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:30" (1/1) ... [2021-11-13 18:41:30,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:41:30,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:41:30,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:41:30,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:41:31,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:30" (1/1) ... [2021-11-13 18:41:31,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:30" (1/1) ... [2021-11-13 18:41:31,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:30" (1/1) ... [2021-11-13 18:41:31,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:30" (1/1) ... [2021-11-13 18:41:31,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:30" (1/1) ... [2021-11-13 18:41:31,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:30" (1/1) ... [2021-11-13 18:41:31,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:30" (1/1) ... [2021-11-13 18:41:31,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:41:31,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:41:31,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:41:31,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:41:31,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:30" (1/1) ... [2021-11-13 18:41:31,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:41:31,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:31,073 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:41:31,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:41:31,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:41:31,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:41:31,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:41:31,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:41:31,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:41:31,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:41:31,120 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2021-11-13 18:41:31,120 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2021-11-13 18:41:31,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:41:31,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:41:31,368 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:41:31,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:41:31 BoogieIcfgContainer [2021-11-13 18:41:31,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:41:31,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:41:31,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:41:31,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:41:31,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:41:30" (1/3) ... [2021-11-13 18:41:31,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79da169e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:41:31, skipping insertion in model container [2021-11-13 18:41:31,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:30" (2/3) ... [2021-11-13 18:41:31,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79da169e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:41:31, skipping insertion in model container [2021-11-13 18:41:31,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:41:31" (3/3) ... [2021-11-13 18:41:31,380 INFO L111 eAbstractionObserver]: Analyzing ICFG mapavg1.i [2021-11-13 18:41:31,386 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:41:31,386 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:41:31,442 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:41:31,457 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:41:31,457 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:41:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:41:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 18:41:31,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:31,493 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:31,493 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:31,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:31,499 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2021-11-13 18:41:31,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:31,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428959969] [2021-11-13 18:41:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:31,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:31,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:41:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:31,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:41:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:31,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:41:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 18:41:31,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:31,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428959969] [2021-11-13 18:41:31,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428959969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:31,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941783208] [2021-11-13 18:41:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:31,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:31,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:31,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:31,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:41:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:31,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:41:31,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:41:31,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:41:31,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941783208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:41:31,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:41:31,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-13 18:41:31,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362118193] [2021-11-13 18:41:31,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:41:32,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:41:32,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:32,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:41:32,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:41:32,031 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:41:32,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:32,064 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-11-13 18:41:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:41:32,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-13 18:41:32,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:32,074 INFO L225 Difference]: With dead ends: 50 [2021-11-13 18:41:32,075 INFO L226 Difference]: Without dead ends: 24 [2021-11-13 18:41:32,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:41:32,082 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:32,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 6.86ms Time] [2021-11-13 18:41:32,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-13 18:41:32,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-13 18:41:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:41:32,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-13 18:41:32,123 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2021-11-13 18:41:32,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:32,124 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-13 18:41:32,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:41:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-13 18:41:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 18:41:32,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:32,127 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:32,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:32,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-13 18:41:32,353 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:32,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:32,353 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2021-11-13 18:41:32,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:32,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069789734] [2021-11-13 18:41:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:32,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:32,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-13 18:41:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:32,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:41:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:32,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:41:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:41:32,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:32,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069789734] [2021-11-13 18:41:32,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069789734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:32,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022923402] [2021-11-13 18:41:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:32,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:32,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:32,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:32,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:41:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:32,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:41:32,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:41:32,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:41:32,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022923402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:41:32,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:41:32,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-13 18:41:32,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026041607] [2021-11-13 18:41:32,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:41:32,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:41:32,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:32,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:41:32,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:41:32,657 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 18:41:32,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:32,668 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-11-13 18:41:32,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:41:32,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-13 18:41:32,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:32,670 INFO L225 Difference]: With dead ends: 42 [2021-11-13 18:41:32,670 INFO L226 Difference]: Without dead ends: 25 [2021-11-13 18:41:32,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:41:32,673 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.82ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:32,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 4.82ms Time] [2021-11-13 18:41:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-13 18:41:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-13 18:41:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:41:32,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-13 18:41:32,681 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2021-11-13 18:41:32,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:32,682 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-13 18:41:32,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 18:41:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-13 18:41:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:41:32,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:32,684 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:32,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:32,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:32,898 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:32,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:32,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2021-11-13 18:41:32,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:32,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300236640] [2021-11-13 18:41:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:32,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:32,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-13 18:41:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:33,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:41:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:33,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 18:41:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:41:33,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:33,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300236640] [2021-11-13 18:41:33,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300236640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:33,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571037234] [2021-11-13 18:41:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:33,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:33,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:33,076 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:33,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:41:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:33,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:41:33,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 18:41:33,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:41:33,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571037234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:41:33,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:41:33,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-13 18:41:33,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650507924] [2021-11-13 18:41:33,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:41:33,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:41:33,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:33,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:41:33,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:41:33,249 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 18:41:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:33,273 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-13 18:41:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:41:33,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-11-13 18:41:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:33,274 INFO L225 Difference]: With dead ends: 39 [2021-11-13 18:41:33,275 INFO L226 Difference]: Without dead ends: 26 [2021-11-13 18:41:33,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:41:33,280 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:33,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 3.71ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 8.00ms Time] [2021-11-13 18:41:33,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-13 18:41:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-13 18:41:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:41:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-13 18:41:33,299 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2021-11-13 18:41:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:33,301 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-13 18:41:33,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 18:41:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-13 18:41:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-13 18:41:33,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:33,306 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:33,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:33,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:33,533 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:33,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2021-11-13 18:41:33,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:33,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100220367] [2021-11-13 18:41:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:33,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:33,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-13 18:41:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:33,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:41:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:33,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:41:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:41:33,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:33,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100220367] [2021-11-13 18:41:33,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100220367] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:33,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681979055] [2021-11-13 18:41:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:33,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:33,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:33,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:33,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:41:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:33,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:41:33,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 18:41:33,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 18:41:33,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681979055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:33,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:33,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-11-13 18:41:33,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818038902] [2021-11-13 18:41:33,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:33,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:41:33,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:33,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:41:33,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:41:33,946 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 18:41:34,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:34,005 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-11-13 18:41:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:41:34,006 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2021-11-13 18:41:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:34,009 INFO L225 Difference]: With dead ends: 54 [2021-11-13 18:41:34,009 INFO L226 Difference]: Without dead ends: 34 [2021-11-13 18:41:34,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:41:34,014 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.69ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:34,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 1.69ms Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 41.39ms Time] [2021-11-13 18:41:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-13 18:41:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-11-13 18:41:34,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:41:34,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-13 18:41:34,028 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2021-11-13 18:41:34,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:34,028 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-13 18:41:34,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 18:41:34,029 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-13 18:41:34,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 18:41:34,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:34,030 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:34,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:34,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:34,256 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:34,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2021-11-13 18:41:34,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:34,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915177254] [2021-11-13 18:41:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:34,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:34,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:41:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:34,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 18:41:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:34,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:41:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 18:41:34,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:34,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915177254] [2021-11-13 18:41:34,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915177254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:34,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374731294] [2021-11-13 18:41:34,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:41:34,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:34,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:34,339 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:34,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:41:34,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:41:34,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:34,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:41:34,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:41:34,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:41:34,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374731294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:34,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:34,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-11-13 18:41:34,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257928681] [2021-11-13 18:41:34,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:34,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:41:34,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:34,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:41:34,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:41:34,749 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:41:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:34,829 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-11-13 18:41:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:41:34,830 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2021-11-13 18:41:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:34,832 INFO L225 Difference]: With dead ends: 70 [2021-11-13 18:41:34,832 INFO L226 Difference]: Without dead ends: 48 [2021-11-13 18:41:34,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:41:34,833 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.83ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:34,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 3.83ms Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 48.19ms Time] [2021-11-13 18:41:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-13 18:41:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-13 18:41:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:41:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-11-13 18:41:34,853 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2021-11-13 18:41:34,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:34,853 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-11-13 18:41:34,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:41:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-11-13 18:41:34,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 18:41:34,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:34,862 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:34,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:35,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:35,088 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:35,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1238744391, now seen corresponding path program 3 times [2021-11-13 18:41:35,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:35,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265010148] [2021-11-13 18:41:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:35,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:35,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:41:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:35,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-13 18:41:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:35,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:41:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-13 18:41:35,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:35,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265010148] [2021-11-13 18:41:35,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265010148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:35,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917819608] [2021-11-13 18:41:35,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:41:35,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:35,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:35,357 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:35,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:41:35,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:41:35,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:35,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:41:35,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-13 18:41:35,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-13 18:41:35,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917819608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:35,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:35,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2021-11-13 18:41:35,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602154102] [2021-11-13 18:41:35,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:35,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:41:35,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:35,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:41:35,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:41:35,751 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:41:35,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:35,819 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2021-11-13 18:41:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:41:35,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2021-11-13 18:41:35,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:35,821 INFO L225 Difference]: With dead ends: 82 [2021-11-13 18:41:35,821 INFO L226 Difference]: Without dead ends: 58 [2021-11-13 18:41:35,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:41:35,825 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.87ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.17ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:35,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 1.87ms Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 52.17ms Time] [2021-11-13 18:41:35,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-13 18:41:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-11-13 18:41:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:41:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-11-13 18:41:35,841 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2021-11-13 18:41:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:35,842 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-11-13 18:41:35,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:41:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-11-13 18:41:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 18:41:35,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:35,848 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:35,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:36,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:36,064 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:36,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:36,065 INFO L85 PathProgramCache]: Analyzing trace with hash 85970241, now seen corresponding path program 4 times [2021-11-13 18:41:36,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:36,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959379851] [2021-11-13 18:41:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:36,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:36,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 18:41:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:36,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:41:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:36,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:41:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-13 18:41:36,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:36,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959379851] [2021-11-13 18:41:36,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959379851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:36,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274071140] [2021-11-13 18:41:36,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:41:36,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:36,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:36,276 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:36,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:41:36,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:41:36,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:36,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:41:36,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-11-13 18:41:36,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-13 18:41:36,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274071140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:36,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:36,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2021-11-13 18:41:36,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999709165] [2021-11-13 18:41:36,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:36,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:41:36,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:36,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:41:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:41:36,754 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:41:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:36,839 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-11-13 18:41:36,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 18:41:36,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2021-11-13 18:41:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:36,842 INFO L225 Difference]: With dead ends: 100 [2021-11-13 18:41:36,843 INFO L226 Difference]: Without dead ends: 68 [2021-11-13 18:41:36,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:41:36,847 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.78ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:36,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 56.78ms Time] [2021-11-13 18:41:36,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-13 18:41:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-13 18:41:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:41:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-11-13 18:41:36,872 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2021-11-13 18:41:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:36,872 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-11-13 18:41:36,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:41:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-11-13 18:41:36,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 18:41:36,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:36,875 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:36,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:37,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:37,085 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:37,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2002416443, now seen corresponding path program 5 times [2021-11-13 18:41:37,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:37,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621766041] [2021-11-13 18:41:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:37,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:37,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:41:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:37,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:41:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:37,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-13 18:41:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-11-13 18:41:37,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:37,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621766041] [2021-11-13 18:41:37,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621766041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:37,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662730572] [2021-11-13 18:41:37,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:41:37,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:37,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:37,288 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:37,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:41:38,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-13 18:41:38,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:38,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:41:38,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-11-13 18:41:38,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-13 18:41:39,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662730572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:39,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:39,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2021-11-13 18:41:39,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660959967] [2021-11-13 18:41:39,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:39,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-13 18:41:39,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:39,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-13 18:41:39,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:41:39,067 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:41:39,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:39,181 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2021-11-13 18:41:39,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 18:41:39,181 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2021-11-13 18:41:39,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:39,182 INFO L225 Difference]: With dead ends: 126 [2021-11-13 18:41:39,182 INFO L226 Difference]: Without dead ends: 86 [2021-11-13 18:41:39,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:41:39,184 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.14ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:39,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 142 Invalid, 89 Unknown, 0 Unchecked, 2.14ms Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 89.51ms Time] [2021-11-13 18:41:39,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-13 18:41:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-11-13 18:41:39,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:41:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-11-13 18:41:39,195 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2021-11-13 18:41:39,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:39,196 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-11-13 18:41:39,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:41:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-11-13 18:41:39,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-13 18:41:39,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:39,202 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:39,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:39,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 18:41:39,428 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:39,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:39,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1921824045, now seen corresponding path program 6 times [2021-11-13 18:41:39,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:39,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578805235] [2021-11-13 18:41:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:39,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:39,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-13 18:41:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:39,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:41:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:39,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-13 18:41:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-11-13 18:41:39,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:39,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578805235] [2021-11-13 18:41:39,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578805235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:39,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134474388] [2021-11-13 18:41:39,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:41:39,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:39,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:39,671 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:39,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:41:40,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-13 18:41:40,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:40,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:41:40,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2021-11-13 18:41:40,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2021-11-13 18:41:40,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134474388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:40,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:40,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2021-11-13 18:41:40,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170463931] [2021-11-13 18:41:40,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:40,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-13 18:41:40,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:40,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-13 18:41:40,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:41:40,947 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:41:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:41,061 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2021-11-13 18:41:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 18:41:41,061 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2021-11-13 18:41:41,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:41,064 INFO L225 Difference]: With dead ends: 160 [2021-11-13 18:41:41,065 INFO L226 Difference]: Without dead ends: 104 [2021-11-13 18:41:41,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:41:41,069 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.57ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.06ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:41,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 86 Unknown, 0 Unchecked, 1.57ms Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 93.06ms Time] [2021-11-13 18:41:41,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-13 18:41:41,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-11-13 18:41:41,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:41:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-11-13 18:41:41,077 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2021-11-13 18:41:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:41,077 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-11-13 18:41:41,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:41:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-11-13 18:41:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-13 18:41:41,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:41,080 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:41,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:41,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-13 18:41:41,296 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:41,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:41,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1322781599, now seen corresponding path program 7 times [2021-11-13 18:41:41,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:41,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080046558] [2021-11-13 18:41:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:41,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:41,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 18:41:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:41,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 18:41:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:41,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:41:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-11-13 18:41:41,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:41,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080046558] [2021-11-13 18:41:41,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080046558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:41,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530265852] [2021-11-13 18:41:41,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:41:41,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:41,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:41,517 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:41,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:41:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:41,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:41:41,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-11-13 18:41:41,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-11-13 18:41:42,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530265852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:42,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:42,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-11-13 18:41:42,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389021782] [2021-11-13 18:41:42,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:42,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-13 18:41:42,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:42,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-13 18:41:42,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:41:42,528 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 18:41:42,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:42,626 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2021-11-13 18:41:42,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-13 18:41:42,627 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2021-11-13 18:41:42,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:42,628 INFO L225 Difference]: With dead ends: 207 [2021-11-13 18:41:42,629 INFO L226 Difference]: Without dead ends: 135 [2021-11-13 18:41:42,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:41:42,631 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.50ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:42,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 112 Invalid, 86 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [19 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 75.50ms Time] [2021-11-13 18:41:42,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-13 18:41:42,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-11-13 18:41:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:41:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2021-11-13 18:41:42,641 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 168 [2021-11-13 18:41:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:42,641 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2021-11-13 18:41:42,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 18:41:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2021-11-13 18:41:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-13 18:41:42,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:42,644 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 30, 30, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:42,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:42,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 18:41:42,857 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:42,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:42,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1725939777, now seen corresponding path program 8 times [2021-11-13 18:41:42,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:42,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811745486] [2021-11-13 18:41:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:42,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:43,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:41:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:43,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 18:41:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:43,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:41:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-11-13 18:41:43,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:43,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811745486] [2021-11-13 18:41:43,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811745486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:43,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920488816] [2021-11-13 18:41:43,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:41:43,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:43,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:43,390 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:43,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:41:43,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:41:43,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:43,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-13 18:41:43,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-11-13 18:41:43,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-11-13 18:41:45,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920488816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:45,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:45,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2021-11-13 18:41:45,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903295575] [2021-11-13 18:41:45,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:45,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-13 18:41:45,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:45,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-13 18:41:45,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-11-13 18:41:45,469 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 18:41:45,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:45,679 INFO L93 Difference]: Finished difference Result 271 states and 310 transitions. [2021-11-13 18:41:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-13 18:41:45,680 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 200 [2021-11-13 18:41:45,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:45,682 INFO L225 Difference]: With dead ends: 271 [2021-11-13 18:41:45,682 INFO L226 Difference]: Without dead ends: 199 [2021-11-13 18:41:45,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-11-13 18:41:45,685 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 123.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.28ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 151.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:45,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 178 Invalid, 167 Unknown, 0 Unchecked, 2.28ms Time], IncrementalHoareTripleChecker [35 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 151.47ms Time] [2021-11-13 18:41:45,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-13 18:41:45,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-11-13 18:41:45,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:41:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2021-11-13 18:41:45,696 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 200 [2021-11-13 18:41:45,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:45,697 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2021-11-13 18:41:45,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 18:41:45,697 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2021-11-13 18:41:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-13 18:41:45,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:45,701 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:45,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:45,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 18:41:45,916 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:45,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:45,917 INFO L85 PathProgramCache]: Analyzing trace with hash -148428801, now seen corresponding path program 9 times [2021-11-13 18:41:45,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:45,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570632997] [2021-11-13 18:41:45,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:45,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:47,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-13 18:41:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:47,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-13 18:41:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:47,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2021-11-13 18:41:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-11-13 18:41:47,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:47,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570632997] [2021-11-13 18:41:47,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570632997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:47,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914795320] [2021-11-13 18:41:47,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:41:47,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:47,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:47,864 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:47,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:41:51,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-13 18:41:51,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:51,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:41:51,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2021-11-13 18:41:52,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2021-11-13 18:41:53,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914795320] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:53,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:53,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 17, 17] total 95 [2021-11-13 18:41:53,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600590301] [2021-11-13 18:41:53,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:53,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-13 18:41:53,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:53,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-13 18:41:53,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2021-11-13 18:41:53,647 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:41:53,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:53,914 INFO L93 Difference]: Finished difference Result 306 states and 333 transitions. [2021-11-13 18:41:53,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-13 18:41:53,922 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 264 [2021-11-13 18:41:53,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:53,925 INFO L225 Difference]: With dead ends: 306 [2021-11-13 18:41:53,925 INFO L226 Difference]: Without dead ends: 234 [2021-11-13 18:41:53,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2021-11-13 18:41:53,929 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 149.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.50ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 196.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:53,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 122 Invalid, 229 Unknown, 0 Unchecked, 2.50ms Time], IncrementalHoareTripleChecker [25 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 196.16ms Time] [2021-11-13 18:41:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-13 18:41:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-11-13 18:41:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:41:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 237 transitions. [2021-11-13 18:41:53,941 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 237 transitions. Word has length 264 [2021-11-13 18:41:53,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:53,942 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 237 transitions. [2021-11-13 18:41:53,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:41:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 237 transitions. [2021-11-13 18:41:53,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-13 18:41:53,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:53,949 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 63, 63, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:53,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:54,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:54,176 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:54,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:54,177 INFO L85 PathProgramCache]: Analyzing trace with hash -2022869279, now seen corresponding path program 10 times [2021-11-13 18:41:54,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:54,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200267449] [2021-11-13 18:41:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:54,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:56,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-13 18:41:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:56,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-13 18:41:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:56,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2021-11-13 18:41:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 8491 trivial. 0 not checked. [2021-11-13 18:41:56,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:56,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200267449] [2021-11-13 18:41:56,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200267449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:56,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974638872] [2021-11-13 18:41:56,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:41:56,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:56,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:56,100 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:56,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:41:56,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:41:56,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:56,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-13 18:41:56,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 5591 proven. 900 refuted. 0 times theorem prover too weak. 5969 trivial. 0 not checked. [2021-11-13 18:41:58,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:42:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 1864 proven. 2764 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2021-11-13 18:42:00,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974638872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:42:00,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:42:00,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 33, 33] total 128 [2021-11-13 18:42:00,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636133646] [2021-11-13 18:42:00,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:42:00,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-13 18:42:00,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:42:00,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-13 18:42:00,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2021-11-13 18:42:00,137 INFO L87 Difference]: Start difference. First operand 233 states and 237 transitions. Second operand has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:42:00,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:42:00,573 INFO L93 Difference]: Finished difference Result 404 states and 447 transitions. [2021-11-13 18:42:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-11-13 18:42:00,574 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 362 [2021-11-13 18:42:00,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:42:00,578 INFO L225 Difference]: With dead ends: 404 [2021-11-13 18:42:00,578 INFO L226 Difference]: Without dead ends: 300 [2021-11-13 18:42:00,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2021-11-13 18:42:00,586 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 228.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.61ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 300.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:42:00,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 202 Invalid, 322 Unknown, 0 Unchecked, 4.61ms Time], IncrementalHoareTripleChecker [40 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 300.14ms Time] [2021-11-13 18:42:00,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-13 18:42:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2021-11-13 18:42:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.010204081632653) internal successors, (297), 294 states have internal predecessors, (297), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:42:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 303 transitions. [2021-11-13 18:42:00,599 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 303 transitions. Word has length 362 [2021-11-13 18:42:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:42:00,601 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 303 transitions. [2021-11-13 18:42:00,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:42:00,602 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 303 transitions. [2021-11-13 18:42:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2021-11-13 18:42:00,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:42:00,624 INFO L514 BasicCegarLoop]: trace histogram [186, 186, 64, 64, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:42:00,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:42:00,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:42:00,838 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:42:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:42:00,838 INFO L85 PathProgramCache]: Analyzing trace with hash 686301475, now seen corresponding path program 11 times [2021-11-13 18:42:00,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:42:00,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434980208] [2021-11-13 18:42:00,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:42:00,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:42:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:02,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:42:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:02,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2021-11-13 18:42:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:02,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 423 [2021-11-13 18:42:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 39275 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 35179 trivial. 0 not checked. [2021-11-13 18:42:02,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:02,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434980208] [2021-11-13 18:42:02,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434980208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:02,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630199368] [2021-11-13 18:42:02,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:42:02,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:02,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:02,688 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:02,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db60db10-8de5-41c4-ab69-f46077cf0890/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process