./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs3.c --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_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/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_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/brs3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/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_f0301934-5927-4444-b648-175fda4a544a/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 c10f08fb4b6a5b6f03e91e10a510f262e1b7fa98e124f4a160c252b3d63b04c2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:24:29,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:24:29,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:24:29,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:24:29,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:24:29,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:24:29,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:24:29,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:24:29,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:24:29,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:24:29,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:24:29,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:24:29,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:24:29,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:24:29,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:24:29,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:24:29,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:24:29,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:24:29,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:24:29,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:24:29,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:24:29,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:24:29,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:24:29,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:24:29,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:24:29,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:24:29,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:24:29,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:24:29,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:24:29,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:24:29,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:24:29,179 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:24:29,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:24:29,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:24:29,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:24:29,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:24:29,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:24:29,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:24:29,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:24:29,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:24:29,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:24:29,185 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:24:29,209 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:24:29,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:24:29,210 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:24:29,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:24:29,211 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:24:29,211 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:24:29,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:24:29,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:24:29,212 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:24:29,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:24:29,212 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:24:29,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:24:29,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:24:29,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:24:29,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:24:29,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:24:29,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:24:29,213 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:24:29,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:24:29,213 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:24:29,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:24:29,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:24:29,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:24:29,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:24:29,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:24:29,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:24:29,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:24:29,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:24:29,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:24:29,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:24:29,214 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:24:29,214 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:24:29,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:24:29,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:24:29,215 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_f0301934-5927-4444-b648-175fda4a544a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10f08fb4b6a5b6f03e91e10a510f262e1b7fa98e124f4a160c252b3d63b04c2 [2021-12-06 23:24:29,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:24:29,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:24:29,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:24:29,424 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:24:29,424 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:24:29,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-fpi/brs3.c [2021-12-06 23:24:29,472 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/data/bf2cdb5e5/865fb22cc719494bb7847c2993b74d00/FLAGc9691e636 [2021-12-06 23:24:29,862 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:24:29,863 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/sv-benchmarks/c/array-fpi/brs3.c [2021-12-06 23:24:29,867 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/data/bf2cdb5e5/865fb22cc719494bb7847c2993b74d00/FLAGc9691e636 [2021-12-06 23:24:29,876 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/data/bf2cdb5e5/865fb22cc719494bb7847c2993b74d00 [2021-12-06 23:24:29,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:24:29,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:24:29,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:24:29,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:24:29,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:24:29,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:24:29" (1/1) ... [2021-12-06 23:24:29,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46efa3b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:24:29, skipping insertion in model container [2021-12-06 23:24:29,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:24:29" (1/1) ... [2021-12-06 23:24:29,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:24:29,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:24:29,999 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_f0301934-5927-4444-b648-175fda4a544a/sv-benchmarks/c/array-fpi/brs3.c[587,600] [2021-12-06 23:24:30,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:24:30,018 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:24:30,028 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_f0301934-5927-4444-b648-175fda4a544a/sv-benchmarks/c/array-fpi/brs3.c[587,600] [2021-12-06 23:24:30,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:24:30,045 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:24:30,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:24:30 WrapperNode [2021-12-06 23:24:30,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:24:30,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:24:30,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:24:30,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:24:30,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:24:30" (1/1) ... [2021-12-06 23:24:30,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:24:30" (1/1) ... [2021-12-06 23:24:30,074 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2021-12-06 23:24:30,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:24:30,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:24:30,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:24:30,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:24:30,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:24:30" (1/1) ... [2021-12-06 23:24:30,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:24:30" (1/1) ... [2021-12-06 23:24:30,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:24:30" (1/1) ... [2021-12-06 23:24:30,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:24:30" (1/1) ... [2021-12-06 23:24:30,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:24:30" (1/1) ... [2021-12-06 23:24:30,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:24:30" (1/1) ... [2021-12-06 23:24:30,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:24:30" (1/1) ... [2021-12-06 23:24:30,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:24:30,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:24:30,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:24:30,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:24:30,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:24:30" (1/1) ... [2021-12-06 23:24:30,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:24:30,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:30,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:24:30,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:24:30,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:24:30,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:24:30,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 23:24:30,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 23:24:30,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 23:24:30,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:24:30,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:24:30,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 23:24:30,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 23:24:30,199 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:24:30,201 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:24:30,291 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:24:30,295 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:24:30,295 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 23:24:30,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:24:30 BoogieIcfgContainer [2021-12-06 23:24:30,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:24:30,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:24:30,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:24:30,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:24:30,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:24:29" (1/3) ... [2021-12-06 23:24:30,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0f9e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:24:30, skipping insertion in model container [2021-12-06 23:24:30,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:24:30" (2/3) ... [2021-12-06 23:24:30,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0f9e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:24:30, skipping insertion in model container [2021-12-06 23:24:30,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:24:30" (3/3) ... [2021-12-06 23:24:30,304 INFO L111 eAbstractionObserver]: Analyzing ICFG brs3.c [2021-12-06 23:24:30,308 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:24:30,308 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:24:30,348 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:24:30,354 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 23:24:30,354 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:24:30,376 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) [2021-12-06 23:24:30,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 23:24:30,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:30,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:30,383 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:30,394 INFO L85 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2021-12-06 23:24:30,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:30,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999122054] [2021-12-06 23:24:30,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:30,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:30,520 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 23:24:30,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:30,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999122054] [2021-12-06 23:24:30,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999122054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:24:30,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:24:30,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:24:30,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92699581] [2021-12-06 23:24:30,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:24:30,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:24:30,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:30,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:24:30,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:24:30,551 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 23:24:30,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:30,562 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-12-06 23:24:30,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:24:30,563 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 23:24:30,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:30,570 INFO L225 Difference]: With dead ends: 36 [2021-12-06 23:24:30,570 INFO L226 Difference]: Without dead ends: 16 [2021-12-06 23:24:30,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:24:30,576 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:30,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:24:30,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-06 23:24:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-06 23:24:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 23:24:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-06 23:24:30,605 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-12-06 23:24:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:30,605 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-06 23:24:30,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 23:24:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-06 23:24:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 23:24:30,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:30,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:30,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:24:30,606 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:30,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:30,607 INFO L85 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2021-12-06 23:24:30,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:30,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624632708] [2021-12-06 23:24:30,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:30,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:30,667 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 23:24:30,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:30,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624632708] [2021-12-06 23:24:30,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624632708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:24:30,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:24:30,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:24:30,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101794691] [2021-12-06 23:24:30,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:24:30,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:24:30,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:30,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:24:30,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:24:30,670 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 23:24:30,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:30,715 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-12-06 23:24:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:24:30,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 23:24:30,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:30,716 INFO L225 Difference]: With dead ends: 33 [2021-12-06 23:24:30,716 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 23:24:30,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:24:30,718 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:30,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:24:30,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 23:24:30,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-12-06 23:24:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-06 23:24:30,723 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2021-12-06 23:24:30,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:30,723 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-06 23:24:30,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 23:24:30,723 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-06 23:24:30,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 23:24:30,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:30,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:30,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:24:30,724 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:30,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2021-12-06 23:24:30,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:30,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702966554] [2021-12-06 23:24:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:30,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:24:30,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:30,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702966554] [2021-12-06 23:24:30,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702966554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:24:30,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:24:30,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:24:30,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2354636] [2021-12-06 23:24:30,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:24:30,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:24:30,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:30,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:24:30,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:24:30,806 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 23:24:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:30,843 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-12-06 23:24:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:24:30,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 23:24:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:30,844 INFO L225 Difference]: With dead ends: 27 [2021-12-06 23:24:30,844 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 23:24:30,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:24:30,846 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:30,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:24:30,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 23:24:30,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-12-06 23:24:30,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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 23:24:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-06 23:24:30,852 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2021-12-06 23:24:30,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:30,852 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-06 23:24:30,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 23:24:30,852 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-06 23:24:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 23:24:30,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:30,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:30,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:24:30,853 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:30,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:30,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1654199858, now seen corresponding path program 1 times [2021-12-06 23:24:30,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:30,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91258896] [2021-12-06 23:24:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:30,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:30,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:30,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91258896] [2021-12-06 23:24:30,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91258896] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:30,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672452962] [2021-12-06 23:24:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:30,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:30,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:30,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:30,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:24:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:30,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:24:30,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:31,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:31,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672452962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:31,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:31,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-06 23:24:31,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393112668] [2021-12-06 23:24:31,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:31,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:24:31,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:24:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:24:31,115 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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 23:24:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:31,183 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-12-06 23:24:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:24:31,183 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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 20 [2021-12-06 23:24:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:31,184 INFO L225 Difference]: With dead ends: 43 [2021-12-06 23:24:31,184 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 23:24:31,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:24:31,186 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:31,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:24:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 23:24:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-12-06 23:24:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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 23:24:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-06 23:24:31,190 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2021-12-06 23:24:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:31,190 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-06 23:24:31,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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 23:24:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-06 23:24:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 23:24:31,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:31,191 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:31,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:24:31,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:31,393 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:31,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:31,396 INFO L85 PathProgramCache]: Analyzing trace with hash 168847774, now seen corresponding path program 1 times [2021-12-06 23:24:31,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:31,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485958422] [2021-12-06 23:24:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:31,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:31,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:31,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485958422] [2021-12-06 23:24:31,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485958422] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:31,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700681785] [2021-12-06 23:24:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:31,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:31,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:31,811 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:31,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:24:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:31,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 23:24:31,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:31,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 23:24:31,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 23:24:32,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 23:24:32,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:24:32,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 28 [2021-12-06 23:24:32,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2021-12-06 23:24:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:32,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:36,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 210 [2021-12-06 23:24:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:36,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700681785] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:36,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:36,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2021-12-06 23:24:36,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808858599] [2021-12-06 23:24:36,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:36,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 23:24:36,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:36,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 23:24:36,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=493, Unknown=4, NotChecked=0, Total=600 [2021-12-06 23:24:36,196 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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 23:24:36,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:36,367 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-12-06 23:24:36,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 23:24:36,368 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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 23 [2021-12-06 23:24:36,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:36,369 INFO L225 Difference]: With dead ends: 52 [2021-12-06 23:24:36,369 INFO L226 Difference]: Without dead ends: 32 [2021-12-06 23:24:36,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=142, Invalid=610, Unknown=4, NotChecked=0, Total=756 [2021-12-06 23:24:36,371 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:36,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 61 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2021-12-06 23:24:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-06 23:24:36,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-12-06 23:24:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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 23:24:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-06 23:24:36,377 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2021-12-06 23:24:36,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:36,377 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-06 23:24:36,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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 23:24:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-06 23:24:36,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 23:24:36,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:36,379 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:36,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:24:36,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:36,579 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1961352373, now seen corresponding path program 2 times [2021-12-06 23:24:36,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:36,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961895410] [2021-12-06 23:24:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:36,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:36,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:36,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961895410] [2021-12-06 23:24:36,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961895410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:36,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661874185] [2021-12-06 23:24:36,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:24:36,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:36,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:36,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:36,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:24:36,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:24:36,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:36,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:24:36,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:36,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:36,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661874185] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:36,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:36,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-06 23:24:36,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699482490] [2021-12-06 23:24:36,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:36,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 23:24:36,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:36,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 23:24:36,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:24:36,751 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:36,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:36,848 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-12-06 23:24:36,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:24:36,848 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 23:24:36,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:36,849 INFO L225 Difference]: With dead ends: 69 [2021-12-06 23:24:36,849 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 23:24:36,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:24:36,851 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:36,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 41 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:24:36,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 23:24:36,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-12-06 23:24:36,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 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) [2021-12-06 23:24:36,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-12-06 23:24:36,857 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 26 [2021-12-06 23:24:36,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:36,857 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-12-06 23:24:36,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-12-06 23:24:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 23:24:36,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:36,859 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:36,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:24:37,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:37,061 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:37,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1198950171, now seen corresponding path program 3 times [2021-12-06 23:24:37,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:37,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334614213] [2021-12-06 23:24:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:37,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:37,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:37,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334614213] [2021-12-06 23:24:37,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334614213] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:37,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613814831] [2021-12-06 23:24:37,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:24:37,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:37,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:37,579 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:37,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:24:37,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 23:24:37,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:37,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 23:24:37,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:37,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 23:24:37,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 23:24:37,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:37,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-06 23:24:40,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:40,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 23:24:40,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:40,495 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-12-06 23:24:40,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 56 [2021-12-06 23:24:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:40,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:40,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:40,646 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-12-06 23:24:40,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 62 [2021-12-06 23:24:40,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:24:40,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:40,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:24:40,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 15 [2021-12-06 23:24:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:24:40,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:48,304 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 23:24:48,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1431 treesize of output 1 [2021-12-06 23:24:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:24:48,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613814831] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:48,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:48,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 51 [2021-12-06 23:24:48,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756540880] [2021-12-06 23:24:48,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:48,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 23:24:48,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:48,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 23:24:48,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=2159, Unknown=5, NotChecked=0, Total=2550 [2021-12-06 23:24:48,314 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 51 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 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 23:24:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:49,072 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2021-12-06 23:24:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 23:24:49,073 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 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 29 [2021-12-06 23:24:49,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:49,075 INFO L225 Difference]: With dead ends: 96 [2021-12-06 23:24:49,075 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 23:24:49,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=705, Invalid=3846, Unknown=5, NotChecked=0, Total=4556 [2021-12-06 23:24:49,078 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:49,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 91 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 161 Invalid, 0 Unknown, 135 Unchecked, 0.1s Time] [2021-12-06 23:24:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 23:24:49,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2021-12-06 23:24:49,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 63 states have internal predecessors, (76), 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 23:24:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-12-06 23:24:49,090 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 29 [2021-12-06 23:24:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:49,090 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-12-06 23:24:49,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 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 23:24:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-12-06 23:24:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 23:24:49,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:49,092 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:49,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:24:49,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 23:24:49,293 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:49,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1892735660, now seen corresponding path program 4 times [2021-12-06 23:24:49,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:49,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372614152] [2021-12-06 23:24:49,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:49,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 23:24:49,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:49,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372614152] [2021-12-06 23:24:49,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372614152] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:49,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481086895] [2021-12-06 23:24:49,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:24:49,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:49,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:49,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:49,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:24:49,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:24:49,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:49,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:24:49,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 23:24:49,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:24:49,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481086895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:24:49,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:24:49,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-06 23:24:49,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232585338] [2021-12-06 23:24:49,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:24:49,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:24:49,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:49,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:24:49,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:24:49,460 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:49,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:49,483 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2021-12-06 23:24:49,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:24:49,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 23:24:49,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:49,484 INFO L225 Difference]: With dead ends: 75 [2021-12-06 23:24:49,484 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 23:24:49,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:24:49,485 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:49,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:24:49,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 23:24:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2021-12-06 23:24:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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 23:24:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-12-06 23:24:49,490 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 32 [2021-12-06 23:24:49,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:49,491 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-12-06 23:24:49,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-12-06 23:24:49,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 23:24:49,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:49,492 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:49,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:24:49,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:49,693 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:49,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1382290761, now seen corresponding path program 5 times [2021-12-06 23:24:49,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:49,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006160532] [2021-12-06 23:24:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:49,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:49,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:49,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006160532] [2021-12-06 23:24:49,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006160532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:49,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031765442] [2021-12-06 23:24:49,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:24:49,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:49,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:49,824 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:49,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:24:49,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 23:24:49,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:49,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:24:49,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:49,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:50,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031765442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:50,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:50,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-06 23:24:50,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109597009] [2021-12-06 23:24:50,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:50,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 23:24:50,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:50,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 23:24:50,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:24:50,011 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 23:24:50,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:50,184 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2021-12-06 23:24:50,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:24:50,184 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 23:24:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:50,185 INFO L225 Difference]: With dead ends: 72 [2021-12-06 23:24:50,185 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 23:24:50,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-12-06 23:24:50,186 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:50,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 37 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:24:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 23:24:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 42. [2021-12-06 23:24:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 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 23:24:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-12-06 23:24:50,191 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2021-12-06 23:24:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:50,191 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-12-06 23:24:50,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 23:24:50,192 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-12-06 23:24:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 23:24:50,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:50,192 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:50,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:24:50,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:50,394 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:50,396 INFO L85 PathProgramCache]: Analyzing trace with hash -283133381, now seen corresponding path program 6 times [2021-12-06 23:24:50,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:50,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377998362] [2021-12-06 23:24:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:50,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:50,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:50,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377998362] [2021-12-06 23:24:50,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377998362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:50,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485307786] [2021-12-06 23:24:50,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:24:50,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:50,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:50,597 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:50,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:24:50,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 23:24:50,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:50,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 23:24:50,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:50,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:50,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485307786] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:50,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:50,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2021-12-06 23:24:50,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461647080] [2021-12-06 23:24:50,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:50,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 23:24:50,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:50,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 23:24:50,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-12-06 23:24:50,808 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 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) [2021-12-06 23:24:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:50,985 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2021-12-06 23:24:50,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 23:24:50,985 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 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) Word has length 35 [2021-12-06 23:24:50,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:50,986 INFO L225 Difference]: With dead ends: 98 [2021-12-06 23:24:50,986 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 23:24:50,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2021-12-06 23:24:50,987 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 110 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:50,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 48 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:24:50,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 23:24:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-12-06 23:24:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 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 23:24:50,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-12-06 23:24:50,994 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 35 [2021-12-06 23:24:50,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:50,994 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-12-06 23:24:50,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 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) [2021-12-06 23:24:50,994 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-12-06 23:24:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 23:24:50,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:50,995 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:50,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:24:51,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:51,195 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:51,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:51,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1273910208, now seen corresponding path program 7 times [2021-12-06 23:24:51,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:51,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999733949] [2021-12-06 23:24:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:51,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:51,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999733949] [2021-12-06 23:24:51,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999733949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167863593] [2021-12-06 23:24:51,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:24:51,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:51,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:51,777 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:51,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0301934-5927-4444-b648-175fda4a544a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:24:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:51,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 23:24:51,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:51,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 23:24:51,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 23:24:51,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:51,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-06 23:24:52,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-12-06 23:24:52,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-12-06 23:24:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:24:52,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2021-12-06 23:24:52,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:24:52,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 57 [2021-12-06 23:24:52,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:24:52,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 54 [2021-12-06 23:24:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:24:52,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 19 [2021-12-06 23:24:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:52,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:55,139 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_323 Int) (v_ArrVal_321 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_319 Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (or (<= (+ v_ArrVal_323 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_323)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse1))) (* 3 c_~N~0)) (< (+ v_ArrVal_321 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_321)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse1))) v_ArrVal_323) (< (+ v_ArrVal_319 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_319)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 4))) v_ArrVal_321) (< 0 v_ArrVal_319)))) is different from false [2021-12-06 23:26:03,928 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-06 23:26:03,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2700 treesize of output 2664