./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 19809800fbb837760f7dcf4b8a93f7732bb250505f3f751815caa258bac4c35a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:24:18,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:24:18,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:24:18,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:24:18,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:24:18,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:24:18,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:24:18,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:24:18,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:24:18,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:24:18,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:24:18,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:24:18,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:24:18,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:24:18,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:24:18,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:24:18,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:24:18,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:24:18,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:24:18,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:24:18,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:24:18,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:24:18,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:24:18,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:24:18,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:24:18,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:24:18,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:24:18,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:24:18,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:24:18,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:24:18,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:24:18,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:24:18,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:24:18,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:24:18,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:24:18,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:24:18,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:24:18,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:24:18,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:24:18,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:24:18,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:24:18,940 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:24:18,989 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:24:18,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:24:18,990 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:24:18,991 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:24:18,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:24:18,992 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:24:18,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:24:18,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:24:18,993 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:24:18,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:24:18,995 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:24:18,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:24:18,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:24:18,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:24:18,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:24:18,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:24:18,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:24:18,996 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:24:18,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:24:18,997 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:24:18,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:24:18,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:24:18,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:24:18,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:24:18,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:24:18,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:24:18,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:24:18,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:24:18,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:24:19,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:24:19,001 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:24:19,001 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:24:19,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:24:19,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:24:19,002 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_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19809800fbb837760f7dcf4b8a93f7732bb250505f3f751815caa258bac4c35a [2021-11-19 04:24:19,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:24:19,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:24:19,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:24:19,375 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:24:19,376 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:24:19,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i [2021-11-19 04:24:19,463 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/data/a203ad063/d20e24260ea84d6497592e1392b6ea98/FLAG90df8642a [2021-11-19 04:24:20,015 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:24:20,015 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i [2021-11-19 04:24:20,030 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/data/a203ad063/d20e24260ea84d6497592e1392b6ea98/FLAG90df8642a [2021-11-19 04:24:20,378 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/data/a203ad063/d20e24260ea84d6497592e1392b6ea98 [2021-11-19 04:24:20,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:24:20,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:24:20,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:24:20,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:24:20,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:24:20,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:24:20" (1/1) ... [2021-11-19 04:24:20,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68596a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:20, skipping insertion in model container [2021-11-19 04:24:20,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:24:20" (1/1) ... [2021-11-19 04:24:20,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:24:20,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:24:20,665 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_b979c74c-1568-4932-b9b2-022339b3b5c0/sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i[860,873] [2021-11-19 04:24:20,698 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:24:20,708 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:24:20,735 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_b979c74c-1568-4932-b9b2-022339b3b5c0/sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i[860,873] [2021-11-19 04:24:20,745 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:24:20,763 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:24:20,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:20 WrapperNode [2021-11-19 04:24:20,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:24:20,766 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:24:20,766 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:24:20,766 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:24:20,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:20" (1/1) ... [2021-11-19 04:24:20,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:20" (1/1) ... [2021-11-19 04:24:20,812 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-11-19 04:24:20,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:24:20,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:24:20,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:24:20,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:24:20,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:20" (1/1) ... [2021-11-19 04:24:20,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:20" (1/1) ... [2021-11-19 04:24:20,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:20" (1/1) ... [2021-11-19 04:24:20,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:20" (1/1) ... [2021-11-19 04:24:20,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:20" (1/1) ... [2021-11-19 04:24:20,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:20" (1/1) ... [2021-11-19 04:24:20,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:20" (1/1) ... [2021-11-19 04:24:20,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:24:20,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:24:20,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:24:20,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:24:20,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:20" (1/1) ... [2021-11-19 04:24:20,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:24:20,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:20,923 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:24:20,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:24:20,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:24:20,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:24:20,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:24:20,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:24:20,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:24:20,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:24:20,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:24:20,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:24:21,091 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:24:21,093 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:24:21,261 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:24:21,269 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:24:21,269 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 04:24:21,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:24:21 BoogieIcfgContainer [2021-11-19 04:24:21,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:24:21,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:24:21,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:24:21,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:24:21,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:24:20" (1/3) ... [2021-11-19 04:24:21,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb8a488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:24:21, skipping insertion in model container [2021-11-19 04:24:21,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:24:20" (2/3) ... [2021-11-19 04:24:21,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb8a488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:24:21, skipping insertion in model container [2021-11-19 04:24:21,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:24:21" (3/3) ... [2021-11-19 04:24:21,283 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum_ground.i [2021-11-19 04:24:21,290 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:24:21,290 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:24:21,413 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:24:21,484 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:24:21,484 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:24:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 04:24:21,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:21,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:21,547 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash -952172836, now seen corresponding path program 1 times [2021-11-19 04:24:21,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:21,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902728370] [2021-11-19 04:24:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:21,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:24:21,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:21,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902728370] [2021-11-19 04:24:21,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902728370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:21,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:21,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:24:21,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105124587] [2021-11-19 04:24:21,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:21,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:24:21,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:21,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:24:21,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:21,888 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-11-19 04:24:21,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:21,987 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2021-11-19 04:24:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:24:21,992 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 [2021-11-19 04:24:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:22,004 INFO L225 Difference]: With dead ends: 42 [2021-11-19 04:24:22,004 INFO L226 Difference]: Without dead ends: 21 [2021-11-19 04:24:22,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:22,018 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:22,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:24:22,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-19 04:24:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-11-19 04:24:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-19 04:24:22,068 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2021-11-19 04:24:22,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:22,069 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-19 04:24:22,069 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) [2021-11-19 04:24:22,071 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-19 04:24:22,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 04:24:22,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:22,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:22,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:24:22,074 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:22,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:22,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1567052653, now seen corresponding path program 1 times [2021-11-19 04:24:22,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:22,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764316207] [2021-11-19 04:24:22,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:22,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:24:22,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:22,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764316207] [2021-11-19 04:24:22,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764316207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:22,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678376171] [2021-11-19 04:24:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:22,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:22,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:22,217 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:22,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:24:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:22,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:24:22,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:24:22,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:24:22,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678376171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:22,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:22,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-19 04:24:22,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176452317] [2021-11-19 04:24:22,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:22,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:24:22,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:22,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:24:22,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:24:22,479 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:22,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:22,625 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-11-19 04:24:22,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:24:22,627 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-19 04:24:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:22,628 INFO L225 Difference]: With dead ends: 49 [2021-11-19 04:24:22,629 INFO L226 Difference]: Without dead ends: 34 [2021-11-19 04:24:22,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:24:22,631 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:22,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:24:22,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-19 04:24:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-19 04:24:22,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-11-19 04:24:22,651 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 16 [2021-11-19 04:24:22,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:22,651 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-11-19 04:24:22,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:22,652 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-11-19 04:24:22,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 04:24:22,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:22,655 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:22,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:22,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:22,879 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:22,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1609282676, now seen corresponding path program 2 times [2021-11-19 04:24:22,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:22,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464816918] [2021-11-19 04:24:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:22,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:24:23,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:23,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464816918] [2021-11-19 04:24:23,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464816918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:23,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310276704] [2021-11-19 04:24:23,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:24:23,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:23,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:23,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:23,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:24:23,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:24:23,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:23,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:24:23,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:24:23,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:24:23,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310276704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:23,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:23,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-19 04:24:23,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725267623] [2021-11-19 04:24:23,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:23,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:24:23,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:23,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:24:23,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:24:23,606 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:23,784 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2021-11-19 04:24:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:24:23,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-19 04:24:23,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:23,787 INFO L225 Difference]: With dead ends: 91 [2021-11-19 04:24:23,787 INFO L226 Difference]: Without dead ends: 64 [2021-11-19 04:24:23,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:24:23,789 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:23,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 54 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:24:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-19 04:24:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-19 04:24:23,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-11-19 04:24:23,800 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 31 [2021-11-19 04:24:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:23,801 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-11-19 04:24:23,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-11-19 04:24:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:24:23,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:23,804 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:23,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:24,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:24,023 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:24,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1049188716, now seen corresponding path program 3 times [2021-11-19 04:24:24,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:24,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847855333] [2021-11-19 04:24:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:24,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-19 04:24:24,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:24,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847855333] [2021-11-19 04:24:24,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847855333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:24,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181936100] [2021-11-19 04:24:24,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:24:24,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:24,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:24,282 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:24,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:24:24,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-19 04:24:24,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:24,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:24:24,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-19 04:24:24,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-19 04:24:24,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181936100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:24,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:24,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-19 04:24:24,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778835582] [2021-11-19 04:24:24,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:24,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 04:24:24,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:24,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 04:24:24,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:24:24,995 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:25,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:25,299 INFO L93 Difference]: Finished difference Result 175 states and 216 transitions. [2021-11-19 04:24:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 04:24:25,301 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 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 [2021-11-19 04:24:25,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:25,306 INFO L225 Difference]: With dead ends: 175 [2021-11-19 04:24:25,306 INFO L226 Difference]: Without dead ends: 124 [2021-11-19 04:24:25,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:24:25,311 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:25,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 22 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:24:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-19 04:24:25,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-19 04:24:25,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.032520325203252) internal successors, (127), 123 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:25,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2021-11-19 04:24:25,345 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 61 [2021-11-19 04:24:25,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:25,348 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2021-11-19 04:24:25,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:25,349 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2021-11-19 04:24:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 04:24:25,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:25,357 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:25,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:25,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:25,576 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:25,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:25,576 INFO L85 PathProgramCache]: Analyzing trace with hash 952921252, now seen corresponding path program 4 times [2021-11-19 04:24:25,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:25,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120072585] [2021-11-19 04:24:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:25,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-11-19 04:24:26,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:26,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120072585] [2021-11-19 04:24:26,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120072585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:26,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291089490] [2021-11-19 04:24:26,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:24:26,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:26,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:26,079 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:26,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:24:26,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:24:26,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:26,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 04:24:26,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-11-19 04:24:26,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-11-19 04:24:27,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291089490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:27,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:27,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-11-19 04:24:27,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565512944] [2021-11-19 04:24:27,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:27,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-19 04:24:27,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:27,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-19 04:24:27,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 04:24:27,758 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 49 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:28,521 INFO L93 Difference]: Finished difference Result 343 states and 420 transitions. [2021-11-19 04:24:28,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-19 04:24:28,531 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 49 states have internal predecessors, (132), 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 121 [2021-11-19 04:24:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:28,536 INFO L225 Difference]: With dead ends: 343 [2021-11-19 04:24:28,536 INFO L226 Difference]: Without dead ends: 244 [2021-11-19 04:24:28,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 04:24:28,540 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 226 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:28,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 46 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:24:28,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-19 04:24:28,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2021-11-19 04:24:28,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.0164609053497942) internal successors, (247), 243 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 247 transitions. [2021-11-19 04:24:28,589 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 247 transitions. Word has length 121 [2021-11-19 04:24:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:28,591 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 247 transitions. [2021-11-19 04:24:28,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.693877551020408) internal successors, (132), 49 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:28,592 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 247 transitions. [2021-11-19 04:24:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-19 04:24:28,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:28,610 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:28,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:28,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:28,838 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:28,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1689532612, now seen corresponding path program 5 times [2021-11-19 04:24:28,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:28,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699003793] [2021-11-19 04:24:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:28,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2021-11-19 04:24:30,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:30,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699003793] [2021-11-19 04:24:30,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699003793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:30,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146179555] [2021-11-19 04:24:30,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:24:30,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:30,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:30,527 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:30,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b979c74c-1568-4932-b9b2-022339b3b5c0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process