./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy1_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy1_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1970a9a8aaeda89e1214c4bedc05560d9ae947bac2f3f8ce77018b7acf727f81 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:50:50,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:50:50,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:50:50,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:50:50,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:50:50,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:50:50,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:50:50,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:50:50,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:50:50,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:50:50,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:50:50,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:50:50,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:50:50,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:50:50,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:50:50,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:50:50,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:50:50,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:50:50,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:50:50,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:50:50,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:50:50,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:50:50,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:50:50,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:50:50,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:50:50,559 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:50:50,559 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:50:50,560 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:50:50,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:50:50,562 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:50:50,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:50:50,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:50:50,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:50:50,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:50:50,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:50:50,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:50:50,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:50:50,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:50:50,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:50:50,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:50:50,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:50:50,569 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:50:50,594 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:50:50,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:50:50,595 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:50:50,595 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:50:50,596 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:50:50,596 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:50:50,597 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:50:50,597 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:50:50,597 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:50:50,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:50:50,598 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:50:50,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:50:50,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:50:50,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:50:50,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:50:50,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:50:50,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:50:50,599 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:50:50,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:50:50,599 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:50:50,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:50:50,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:50:50,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:50:50,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:50:50,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:50:50,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:50:50,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:50:50,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:50:50,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:50:50,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:50:50,601 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:50:50,602 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:50:50,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:50:50,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:50:50,602 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_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1970a9a8aaeda89e1214c4bedc05560d9ae947bac2f3f8ce77018b7acf727f81 [2021-12-06 23:50:50,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:50:50,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:50:50,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:50:50,825 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:50:50,825 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:50:50,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-examples/standard_copy1_ground-2.i [2021-12-06 23:50:50,867 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/data/d3b10504a/d955efd9af3b47068baedbc36d82590a/FLAGa4de49d00 [2021-12-06 23:50:51,254 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:50:51,254 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/sv-benchmarks/c/array-examples/standard_copy1_ground-2.i [2021-12-06 23:50:51,258 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/data/d3b10504a/d955efd9af3b47068baedbc36d82590a/FLAGa4de49d00 [2021-12-06 23:50:51,648 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/data/d3b10504a/d955efd9af3b47068baedbc36d82590a [2021-12-06 23:50:51,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:50:51,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:50:51,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:50:51,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:50:51,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:50:51,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:50:51" (1/1) ... [2021-12-06 23:50:51,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@564cdd5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:50:51, skipping insertion in model container [2021-12-06 23:50:51,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:50:51" (1/1) ... [2021-12-06 23:50:51,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:50:51,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:50:51,777 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/sv-benchmarks/c/array-examples/standard_copy1_ground-2.i[816,829] [2021-12-06 23:50:51,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:50:51,793 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:50:51,802 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/sv-benchmarks/c/array-examples/standard_copy1_ground-2.i[816,829] [2021-12-06 23:50:51,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:50:51,819 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:50:51,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:50:51 WrapperNode [2021-12-06 23:50:51,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:50:51,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:50:51,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:50:51,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:50:51,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:50:51" (1/1) ... [2021-12-06 23:50:51,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:50:51" (1/1) ... [2021-12-06 23:50:51,845 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2021-12-06 23:50:51,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:50:51,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:50:51,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:50:51,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:50:51,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:50:51" (1/1) ... [2021-12-06 23:50:51,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:50:51" (1/1) ... [2021-12-06 23:50:51,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:50:51" (1/1) ... [2021-12-06 23:50:51,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:50:51" (1/1) ... [2021-12-06 23:50:51,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:50:51" (1/1) ... [2021-12-06 23:50:51,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:50:51" (1/1) ... [2021-12-06 23:50:51,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:50:51" (1/1) ... [2021-12-06 23:50:51,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:50:51,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:50:51,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:50:51,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:50:51,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:50:51" (1/1) ... [2021-12-06 23:50:51,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:50:51,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:50:51,895 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:50:51,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:50:51,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:50:51,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:50:51,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 23:50:51,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 23:50:51,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:50:51,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:50:51,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 23:50:51,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 23:50:51,973 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:50:51,974 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:50:52,062 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:50:52,068 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:50:52,069 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 23:50:52,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:50:52 BoogieIcfgContainer [2021-12-06 23:50:52,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:50:52,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:50:52,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:50:52,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:50:52,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:50:51" (1/3) ... [2021-12-06 23:50:52,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec8a362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:50:52, skipping insertion in model container [2021-12-06 23:50:52,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:50:51" (2/3) ... [2021-12-06 23:50:52,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec8a362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:50:52, skipping insertion in model container [2021-12-06 23:50:52,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:50:52" (3/3) ... [2021-12-06 23:50:52,079 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-2.i [2021-12-06 23:50:52,085 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:50:52,085 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:50:52,131 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:50:52,136 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:50:52,137 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:50:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:52,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 23:50:52,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:50:52,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:50:52,157 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:50:52,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:50:52,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2021-12-06 23:50:52,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:50:52,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807297429] [2021-12-06 23:50:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:52,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:50:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:50:52,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:50:52,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807297429] [2021-12-06 23:50:52,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807297429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:50:52,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:50:52,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:50:52,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319543304] [2021-12-06 23:50:52,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:50:52,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:50:52,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:52,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:50:52,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:50:52,335 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:50:52,358 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-12-06 23:50:52,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:50:52,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 23:50:52,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:50:52,369 INFO L225 Difference]: With dead ends: 34 [2021-12-06 23:50:52,369 INFO L226 Difference]: Without dead ends: 16 [2021-12-06 23:50:52,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:50:52,376 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:50:52,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:50:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-06 23:50:52,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-12-06 23:50:52,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:52,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-12-06 23:50:52,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-12-06 23:50:52,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:50:52,409 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-12-06 23:50:52,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:52,410 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-12-06 23:50:52,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 23:50:52,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:50:52,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:50:52,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:50:52,411 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:50:52,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:50:52,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1564645395, now seen corresponding path program 1 times [2021-12-06 23:50:52,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:50:52,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554788650] [2021-12-06 23:50:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:52,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:50:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:50:52,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:50:52,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554788650] [2021-12-06 23:50:52,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554788650] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:52,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983266141] [2021-12-06 23:50:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:52,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:52,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:50:52,470 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:50:52,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:50:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:52,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 23:50:52,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:50:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:50:52,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:50:52,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983266141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:50:52,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:50:52,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 23:50:52,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014136206] [2021-12-06 23:50:52,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:50:52,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:50:52,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:52,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:50:52,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:50:52,546 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:52,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:50:52,554 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-12-06 23:50:52,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:50:52,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 23:50:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:50:52,555 INFO L225 Difference]: With dead ends: 24 [2021-12-06 23:50:52,555 INFO L226 Difference]: Without dead ends: 17 [2021-12-06 23:50:52,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:50:52,557 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:50:52,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:50:52,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-06 23:50:52,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-12-06 23:50:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-06 23:50:52,561 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2021-12-06 23:50:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:50:52,561 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-06 23:50:52,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:52,561 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-06 23:50:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 23:50:52,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:50:52,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:50:52,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:50:52,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:52,764 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:50:52,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:50:52,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2021-12-06 23:50:52,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:50:52,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378550468] [2021-12-06 23:50:52,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:52,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:50:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:50:52,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:50:52,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378550468] [2021-12-06 23:50:52,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378550468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:52,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390506822] [2021-12-06 23:50:52,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:52,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:52,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:50:52,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:50:52,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:50:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:50:53,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:50:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:50:53,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:50:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:50:53,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390506822] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:50:53,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:50:53,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-06 23:50:53,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824383980] [2021-12-06 23:50:53,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:50:53,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:50:53,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:53,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:50:53,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:50:53,072 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:53,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:50:53,092 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-12-06 23:50:53,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:50:53,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 23:50:53,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:50:53,093 INFO L225 Difference]: With dead ends: 33 [2021-12-06 23:50:53,093 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 23:50:53,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:50:53,094 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:50:53,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:50:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 23:50:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-06 23:50:53,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-06 23:50:53,098 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2021-12-06 23:50:53,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:50:53,098 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-06 23:50:53,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:53,098 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-06 23:50:53,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 23:50:53,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:50:53,099 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:50:53,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:50:53,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:53,301 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:50:53,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:50:53,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2021040587, now seen corresponding path program 2 times [2021-12-06 23:50:53,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:50:53,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690193280] [2021-12-06 23:50:53,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:53,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:50:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 23:50:53,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:50:53,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690193280] [2021-12-06 23:50:53,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690193280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:53,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205071203] [2021-12-06 23:50:53,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:50:53,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:53,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:50:53,463 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:50:53,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:50:53,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:50:53,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:50:53,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:50:53,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:50:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:50:53,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:50:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:50:53,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205071203] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:50:53,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:50:53,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-06 23:50:53,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21093115] [2021-12-06 23:50:53,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:50:53,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 23:50:53,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 23:50:53,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:50:53,626 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:53,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:50:53,666 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-12-06 23:50:53,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:50:53,666 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 23:50:53,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:50:53,667 INFO L225 Difference]: With dead ends: 48 [2021-12-06 23:50:53,667 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 23:50:53,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:50:53,668 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:50:53,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 50 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:50:53,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 23:50:53,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-12-06 23:50:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-12-06 23:50:53,673 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 19 [2021-12-06 23:50:53,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:50:53,673 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-12-06 23:50:53,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:53,673 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-12-06 23:50:53,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 23:50:53,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:50:53,674 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:50:53,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:50:53,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:53,876 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:50:53,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:50:53,878 INFO L85 PathProgramCache]: Analyzing trace with hash 709790269, now seen corresponding path program 3 times [2021-12-06 23:50:53,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:50:53,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280181884] [2021-12-06 23:50:53,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:53,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:50:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:50:54,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:50:54,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280181884] [2021-12-06 23:50:54,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280181884] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:54,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455388682] [2021-12-06 23:50:54,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:50:54,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:54,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:50:54,127 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:50:54,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:50:54,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 23:50:54,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:50:54,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:50:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:50:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 23:50:54,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:50:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 23:50:54,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455388682] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:50:54,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:50:54,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2021-12-06 23:50:54,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038887524] [2021-12-06 23:50:54,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:50:54,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 23:50:54,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:54,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 23:50:54,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:50:54,278 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:54,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:50:54,321 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-12-06 23:50:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 23:50:54,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 23:50:54,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:50:54,322 INFO L225 Difference]: With dead ends: 60 [2021-12-06 23:50:54,322 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 23:50:54,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:50:54,323 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:50:54,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 60 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:50:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 23:50:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-06 23:50:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:54,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-12-06 23:50:54,328 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 33 [2021-12-06 23:50:54,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:50:54,329 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-12-06 23:50:54,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:54,329 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-12-06 23:50:54,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 23:50:54,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:50:54,330 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:50:54,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 23:50:54,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:54,531 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:50:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:50:54,533 INFO L85 PathProgramCache]: Analyzing trace with hash -593240461, now seen corresponding path program 4 times [2021-12-06 23:50:54,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:50:54,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889566565] [2021-12-06 23:50:54,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:54,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:50:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 23:50:54,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:50:54,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889566565] [2021-12-06 23:50:54,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889566565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:54,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554554283] [2021-12-06 23:50:54,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:50:54,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:54,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:50:54,745 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:50:54,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:50:54,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:50:54,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:50:54,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:50:54,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:50:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-06 23:50:54,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:50:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-06 23:50:55,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554554283] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:50:55,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:50:55,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2021-12-06 23:50:55,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319392945] [2021-12-06 23:50:55,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:50:55,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 23:50:55,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:55,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 23:50:55,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-12-06 23:50:55,002 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:50:55,060 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2021-12-06 23:50:55,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 23:50:55,060 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-06 23:50:55,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:50:55,061 INFO L225 Difference]: With dead ends: 86 [2021-12-06 23:50:55,061 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 23:50:55,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-12-06 23:50:55,062 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:50:55,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 69 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:50:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 23:50:55,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-12-06 23:50:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-12-06 23:50:55,068 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 43 [2021-12-06 23:50:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:50:55,068 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-12-06 23:50:55,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-12-06 23:50:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 23:50:55,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:50:55,070 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:50:55,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 23:50:55,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:55,271 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:50:55,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:50:55,273 INFO L85 PathProgramCache]: Analyzing trace with hash 65706529, now seen corresponding path program 5 times [2021-12-06 23:50:55,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:50:55,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215245355] [2021-12-06 23:50:55,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:55,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:50:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-06 23:50:55,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:50:55,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215245355] [2021-12-06 23:50:55,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215245355] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:55,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893064754] [2021-12-06 23:50:55,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:50:55,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:55,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:50:55,437 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:50:55,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:50:59,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 23:50:59,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:50:59,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 23:50:59,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:50:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-06 23:50:59,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:50:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-06 23:50:59,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893064754] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:50:59,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:50:59,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 45 [2021-12-06 23:50:59,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277034983] [2021-12-06 23:50:59,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:50:59,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 23:50:59,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 23:50:59,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 23:50:59,573 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:59,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:50:59,677 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2021-12-06 23:50:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 23:50:59,677 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-06 23:50:59,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:50:59,678 INFO L225 Difference]: With dead ends: 136 [2021-12-06 23:50:59,678 INFO L226 Difference]: Without dead ends: 99 [2021-12-06 23:50:59,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 23:50:59,679 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:50:59,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 58 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:50:59,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-06 23:50:59,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-12-06 23:50:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 97 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2021-12-06 23:50:59,687 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 61 [2021-12-06 23:50:59,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:50:59,687 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2021-12-06 23:50:59,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:50:59,687 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2021-12-06 23:50:59,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 23:50:59,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:50:59,688 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:50:59,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:50:59,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:59,890 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:50:59,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:50:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash -342693825, now seen corresponding path program 6 times [2021-12-06 23:50:59,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:50:59,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837627555] [2021-12-06 23:50:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:59,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:51:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-12-06 23:51:00,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:51:00,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837627555] [2021-12-06 23:51:00,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837627555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:51:00,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74879811] [2021-12-06 23:51:00,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:51:00,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:51:00,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:51:00,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:51:00,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:51:06,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-12-06 23:51:06,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:51:06,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 23:51:06,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:51:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-12-06 23:51:06,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:51:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-12-06 23:51:07,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74879811] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:51:07,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:51:07,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-12-06 23:51:07,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414501812] [2021-12-06 23:51:07,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:51:07,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 23:51:07,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:51:07,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 23:51:07,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-12-06 23:51:07,095 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:51:07,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:51:07,157 INFO L93 Difference]: Finished difference Result 197 states and 215 transitions. [2021-12-06 23:51:07,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 23:51:07,157 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-06 23:51:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:51:07,158 INFO L225 Difference]: With dead ends: 197 [2021-12-06 23:51:07,158 INFO L226 Difference]: Without dead ends: 128 [2021-12-06 23:51:07,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-12-06 23:51:07,160 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:51:07,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 50 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:51:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-06 23:51:07,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-06 23:51:07,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:51:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2021-12-06 23:51:07,168 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 95 [2021-12-06 23:51:07,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:51:07,168 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2021-12-06 23:51:07,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:51:07,168 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2021-12-06 23:51:07,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 23:51:07,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:51:07,170 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:51:07,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:51:07,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:51:07,371 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:51:07,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:51:07,371 INFO L85 PathProgramCache]: Analyzing trace with hash 819713505, now seen corresponding path program 7 times [2021-12-06 23:51:07,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:51:07,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156402243] [2021-12-06 23:51:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:51:07,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:51:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-12-06 23:51:07,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:51:07,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156402243] [2021-12-06 23:51:07,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156402243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:51:07,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466013901] [2021-12-06 23:51:07,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:51:07,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:51:07,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:51:07,710 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:51:07,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:51:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 23:51:07,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:51:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-12-06 23:51:07,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:51:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-12-06 23:51:08,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466013901] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:51:08,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:51:08,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2021-12-06 23:51:08,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417947484] [2021-12-06 23:51:08,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:51:08,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 23:51:08,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:51:08,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 23:51:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 23:51:08,649 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:51:08,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:51:08,795 INFO L93 Difference]: Finished difference Result 257 states and 290 transitions. [2021-12-06 23:51:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 23:51:08,796 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-06 23:51:08,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:51:08,797 INFO L225 Difference]: With dead ends: 257 [2021-12-06 23:51:08,797 INFO L226 Difference]: Without dead ends: 188 [2021-12-06 23:51:08,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 23:51:08,799 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 87 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:51:08,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 74 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:51:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-06 23:51:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-12-06 23:51:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0160427807486632) internal successors, (190), 187 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:51:08,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2021-12-06 23:51:08,810 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 125 [2021-12-06 23:51:08,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:51:08,810 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2021-12-06 23:51:08,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:51:08,810 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2021-12-06 23:51:08,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-06 23:51:08,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:51:08,812 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:51:08,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:51:09,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:51:09,014 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:51:09,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:51:09,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1843021147, now seen corresponding path program 8 times [2021-12-06 23:51:09,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:51:09,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197514751] [2021-12-06 23:51:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:51:09,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:51:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-12-06 23:51:09,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:51:09,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197514751] [2021-12-06 23:51:09,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197514751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:51:09,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694883951] [2021-12-06 23:51:09,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:51:09,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:51:09,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:51:09,993 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:51:09,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:51:10,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:51:10,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:51:10,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 23:51:10,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:51:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-12-06 23:51:10,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:51:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-12-06 23:51:12,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694883951] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:51:12,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:51:12,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 121 [2021-12-06 23:51:12,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413329045] [2021-12-06 23:51:12,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:51:12,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-12-06 23:51:12,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:51:12,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-12-06 23:51:12,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2021-12-06 23:51:12,599 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 121 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:51:12,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:51:12,905 INFO L93 Difference]: Finished difference Result 377 states and 440 transitions. [2021-12-06 23:51:12,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-12-06 23:51:12,906 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 121 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-12-06 23:51:12,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:51:12,908 INFO L225 Difference]: With dead ends: 377 [2021-12-06 23:51:12,908 INFO L226 Difference]: Without dead ends: 308 [2021-12-06 23:51:12,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2021-12-06 23:51:12,914 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 118 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:51:12,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 98 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:51:12,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-06 23:51:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-12-06 23:51:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.009771986970684) internal successors, (310), 307 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:51:12,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 310 transitions. [2021-12-06 23:51:12,929 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 310 transitions. Word has length 185 [2021-12-06 23:51:12,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:51:12,930 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 310 transitions. [2021-12-06 23:51:12,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 121 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:51:12,930 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 310 transitions. [2021-12-06 23:51:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-12-06 23:51:12,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:51:12,934 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:51:12,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:51:13,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 23:51:13,136 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:51:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:51:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1223502381, now seen corresponding path program 9 times [2021-12-06 23:51:13,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:51:13,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152082704] [2021-12-06 23:51:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:51:13,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:51:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14824 backedges. 0 proven. 13924 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-12-06 23:51:16,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:51:16,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152082704] [2021-12-06 23:51:16,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152082704] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:51:16,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136680856] [2021-12-06 23:51:16,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:51:16,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:51:16,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:51:16,128 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:51:16,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:52:45,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-12-06 23:52:45,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:52:45,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 23:52:45,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:52:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 14824 backedges. 235 proven. 900 refuted. 0 times theorem prover too weak. 13689 trivial. 0 not checked. [2021-12-06 23:52:46,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:52:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14824 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 13924 trivial. 0 not checked. [2021-12-06 23:52:48,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136680856] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:52:48,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:52:48,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 35, 33] total 185 [2021-12-06 23:52:48,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116660833] [2021-12-06 23:52:48,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:52:48,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2021-12-06 23:52:48,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:52:48,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2021-12-06 23:52:48,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9518, Invalid=24522, Unknown=0, NotChecked=0, Total=34040 [2021-12-06 23:52:48,429 INFO L87 Difference]: Start difference. First operand 308 states and 310 transitions. Second operand has 185 states, 185 states have (on average 2.0432432432432432) internal successors, (378), 185 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:52:51,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:52:51,452 INFO L93 Difference]: Finished difference Result 445 states and 482 transitions. [2021-12-06 23:52:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-12-06 23:52:51,452 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 2.0432432432432432) internal successors, (378), 185 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2021-12-06 23:52:51,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:52:51,454 INFO L225 Difference]: With dead ends: 445 [2021-12-06 23:52:51,454 INFO L226 Difference]: Without dead ends: 376 [2021-12-06 23:52:51,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9766 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=13548, Invalid=47214, Unknown=0, NotChecked=0, Total=60762 [2021-12-06 23:52:51,458 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 287 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:52:51,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 96 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:52:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-12-06 23:52:51,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2021-12-06 23:52:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 1.008) internal successors, (378), 375 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:52:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 378 transitions. [2021-12-06 23:52:51,468 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 378 transitions. Word has length 305 [2021-12-06 23:52:51,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:52:51,469 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 378 transitions. [2021-12-06 23:52:51,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 2.0432432432432432) internal successors, (378), 185 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:52:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 378 transitions. [2021-12-06 23:52:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-12-06 23:52:51,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:52:51,473 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:52:51,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:52:51,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:52:51,675 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:52:51,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:52:51,677 INFO L85 PathProgramCache]: Analyzing trace with hash 640186601, now seen corresponding path program 10 times [2021-12-06 23:52:51,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:52:51,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385326960] [2021-12-06 23:52:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:52:51,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:52:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:52:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18244 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2021-12-06 23:52:54,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:52:54,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385326960] [2021-12-06 23:52:54,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385326960] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:52:54,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953196248] [2021-12-06 23:52:54,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:52:54,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:52:54,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:52:54,888 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:52:54,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:52:55,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:52:55,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:52:55,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 2539 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 23:52:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:52:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18244 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 14400 trivial. 0 not checked. [2021-12-06 23:52:57,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:53:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18244 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 14400 trivial. 0 not checked. [2021-12-06 23:53:01,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953196248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:53:01,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:53:01,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 65, 65] total 249 [2021-12-06 23:53:01,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222168132] [2021-12-06 23:53:01,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:53:01,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 249 states [2021-12-06 23:53:01,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:53:01,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 249 interpolants. [2021-12-06 23:53:01,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15630, Invalid=46122, Unknown=0, NotChecked=0, Total=61752 [2021-12-06 23:53:01,550 INFO L87 Difference]: Start difference. First operand 376 states and 378 transitions. Second operand has 249 states, 249 states have (on average 2.036144578313253) internal successors, (507), 249 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:53:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:53:02,353 INFO L93 Difference]: Finished difference Result 640 states and 708 transitions. [2021-12-06 23:53:02,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2021-12-06 23:53:02,354 INFO L78 Accepts]: Start accepts. Automaton has has 249 states, 249 states have (on average 2.036144578313253) internal successors, (507), 249 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-12-06 23:53:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:53:02,356 INFO L225 Difference]: With dead ends: 640 [2021-12-06 23:53:02,356 INFO L226 Difference]: Without dead ends: 507 [2021-12-06 23:53:02,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 867 GetRequests, 620 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15120 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=15630, Invalid=46122, Unknown=0, NotChecked=0, Total=61752 [2021-12-06 23:53:02,359 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 310 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:53:02,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 115 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:53:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-12-06 23:53:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 506. [2021-12-06 23:53:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 1.005940594059406) internal successors, (508), 505 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:53:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 508 transitions. [2021-12-06 23:53:02,371 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 508 transitions. Word has length 373 [2021-12-06 23:53:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:53:02,372 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 508 transitions. [2021-12-06 23:53:02,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 249 states, 249 states have (on average 2.036144578313253) internal successors, (507), 249 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:53:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 508 transitions. [2021-12-06 23:53:02,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-12-06 23:53:02,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:53:02,375 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:53:02,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 23:53:02,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 23:53:02,576 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:53:02,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:53:02,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1405116249, now seen corresponding path program 11 times [2021-12-06 23:53:02,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:53:02,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252248520] [2021-12-06 23:53:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:53:02,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:53:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:53:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30517 backedges. 0 proven. 14641 refuted. 0 times theorem prover too weak. 15876 trivial. 0 not checked. [2021-12-06 23:53:05,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:53:05,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252248520] [2021-12-06 23:53:05,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252248520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:53:05,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751834344] [2021-12-06 23:53:05,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:53:05,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:53:05,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:53:05,808 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:53:05,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c302b9e-4235-41b5-8986-9f4d68e6ebb8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process