./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/rewnif.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_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/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_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/rewnif.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/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_ef5c8558-3780-4e99-a1b2-a456d8b94311/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 5ee21d1db2a363655b71bcb8ab92ef8d6b86a57a4ebbd79d98cb55c59d3ed1f5 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:53:04,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:53:04,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:53:04,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:53:04,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:53:04,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:53:04,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:53:04,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:53:04,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:53:04,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:53:04,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:53:04,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:53:04,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:53:04,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:53:04,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:53:04,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:53:04,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:53:04,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:53:04,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:53:04,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:53:04,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:53:04,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:53:04,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:53:04,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:53:04,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:53:04,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:53:04,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:53:04,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:53:04,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:53:04,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:53:04,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:53:04,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:53:04,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:53:04,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:53:04,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:53:04,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:53:04,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:53:04,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:53:04,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:53:04,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:53:04,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:53:04,231 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:53:04,254 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:53:04,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:53:04,255 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:53:04,255 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:53:04,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:53:04,256 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:53:04,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:53:04,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:53:04,256 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:53:04,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:53:04,257 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:53:04,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:53:04,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:53:04,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:53:04,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:53:04,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:53:04,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:53:04,258 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:53:04,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:53:04,258 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:53:04,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:53:04,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:53:04,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:53:04,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:53:04,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:53:04,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:53:04,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:53:04,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:53:04,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:53:04,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:53:04,260 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:53:04,260 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:53:04,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:53:04,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:53:04,261 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_ef5c8558-3780-4e99-a1b2-a456d8b94311/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ee21d1db2a363655b71bcb8ab92ef8d6b86a57a4ebbd79d98cb55c59d3ed1f5 [2021-12-06 17:53:04,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:53:04,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:53:04,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:53:04,463 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:53:04,463 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:53:04,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-tiling/rewnif.c [2021-12-06 17:53:04,506 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/data/5478f9e75/14a9eb5c409e4526b221f0b35168ec5b/FLAGfb9b4beab [2021-12-06 17:53:04,890 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:53:04,890 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/sv-benchmarks/c/array-tiling/rewnif.c [2021-12-06 17:53:04,895 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/data/5478f9e75/14a9eb5c409e4526b221f0b35168ec5b/FLAGfb9b4beab [2021-12-06 17:53:04,906 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/data/5478f9e75/14a9eb5c409e4526b221f0b35168ec5b [2021-12-06 17:53:04,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:53:04,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:53:04,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:53:04,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:53:04,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:53:04,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:53:04" (1/1) ... [2021-12-06 17:53:04,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a4faf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:53:04, skipping insertion in model container [2021-12-06 17:53:04,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:53:04" (1/1) ... [2021-12-06 17:53:04,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:53:04,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:53:05,037 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_ef5c8558-3780-4e99-a1b2-a456d8b94311/sv-benchmarks/c/array-tiling/rewnif.c[397,410] [2021-12-06 17:53:05,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:53:05,055 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:53:05,067 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_ef5c8558-3780-4e99-a1b2-a456d8b94311/sv-benchmarks/c/array-tiling/rewnif.c[397,410] [2021-12-06 17:53:05,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:53:05,083 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:53:05,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:53:05 WrapperNode [2021-12-06 17:53:05,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:53:05,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:53:05,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:53:05,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:53:05,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:53:05" (1/1) ... [2021-12-06 17:53:05,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:53:05" (1/1) ... [2021-12-06 17:53:05,107 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2021-12-06 17:53:05,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:53:05,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:53:05,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:53:05,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:53:05,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:53:05" (1/1) ... [2021-12-06 17:53:05,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:53:05" (1/1) ... [2021-12-06 17:53:05,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:53:05" (1/1) ... [2021-12-06 17:53:05,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:53:05" (1/1) ... [2021-12-06 17:53:05,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:53:05" (1/1) ... [2021-12-06 17:53:05,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:53:05" (1/1) ... [2021-12-06 17:53:05,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:53:05" (1/1) ... [2021-12-06 17:53:05,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:53:05,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:53:05,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:53:05,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:53:05,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:53:05" (1/1) ... [2021-12-06 17:53:05,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:53:05,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:05,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:53:05,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:53:05,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:53:05,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:53:05,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:53:05,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 17:53:05,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:53:05,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:53:05,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 17:53:05,255 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:53:05,256 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:53:05,331 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:53:05,336 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:53:05,336 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 17:53:05,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:53:05 BoogieIcfgContainer [2021-12-06 17:53:05,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:53:05,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:53:05,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:53:05,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:53:05,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:53:04" (1/3) ... [2021-12-06 17:53:05,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b46b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:53:05, skipping insertion in model container [2021-12-06 17:53:05,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:53:05" (2/3) ... [2021-12-06 17:53:05,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b46b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:53:05, skipping insertion in model container [2021-12-06 17:53:05,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:53:05" (3/3) ... [2021-12-06 17:53:05,343 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnif.c [2021-12-06 17:53:05,347 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:53:05,347 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:53:05,382 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:53:05,388 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 17:53:05,388 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:53:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:53:05,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:05,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:05,404 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:05,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:05,408 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2021-12-06 17:53:05,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:05,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061112765] [2021-12-06 17:53:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:05,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:05,529 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 17:53:05,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:05,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061112765] [2021-12-06 17:53:05,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061112765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:53:05,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:53:05,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:53:05,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575671054] [2021-12-06 17:53:05,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:53:05,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:53:05,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:05,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:53:05,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:53:05,568 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:05,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:05,582 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-12-06 17:53:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:53:05,584 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 17:53:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:05,591 INFO L225 Difference]: With dead ends: 29 [2021-12-06 17:53:05,591 INFO L226 Difference]: Without dead ends: 14 [2021-12-06 17:53:05,594 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 17:53:05,598 INFO L933 BasicCegarLoop]: 21 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, 21 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 17:53:05,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:53:05,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-06 17:53:05,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-06 17:53:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-06 17:53:05,629 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-12-06 17:53:05,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:05,630 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-06 17:53:05,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-06 17:53:05,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:53:05,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:05,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:05,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:53:05,631 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:05,632 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2021-12-06 17:53:05,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:05,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043663100] [2021-12-06 17:53:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:05,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:05,689 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 17:53:05,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:05,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043663100] [2021-12-06 17:53:05,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043663100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:53:05,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:53:05,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:53:05,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776484158] [2021-12-06 17:53:05,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:53:05,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:53:05,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:05,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:53:05,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:53:05,694 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:05,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:05,721 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-12-06 17:53:05,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:53:05,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 17:53:05,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:05,722 INFO L225 Difference]: With dead ends: 29 [2021-12-06 17:53:05,722 INFO L226 Difference]: Without dead ends: 18 [2021-12-06 17:53:05,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:53:05,724 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:05,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:53:05,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-06 17:53:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-12-06 17:53:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-06 17:53:05,728 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-12-06 17:53:05,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:05,728 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-06 17:53:05,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:05,729 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-06 17:53:05,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 17:53:05,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:05,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:05,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:53:05,730 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:05,730 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2021-12-06 17:53:05,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:05,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509134395] [2021-12-06 17:53:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:05,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:05,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:05,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509134395] [2021-12-06 17:53:05,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509134395] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:05,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061102472] [2021-12-06 17:53:05,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:05,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:05,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:05,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:05,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:53:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:05,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:53:05,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:05,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:05,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061102472] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:05,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:05,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-06 17:53:05,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246799218] [2021-12-06 17:53:05,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:05,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:53:05,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:05,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:53:05,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:53:05,953 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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 17:53:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:05,994 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-12-06 17:53:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:53:05,995 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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) Word has length 12 [2021-12-06 17:53:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:05,995 INFO L225 Difference]: With dead ends: 34 [2021-12-06 17:53:05,995 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 17:53:05,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:53:05,997 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:05,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:53:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 17:53:06,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-12-06 17:53:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-06 17:53:06,000 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-12-06 17:53:06,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:06,001 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-06 17:53:06,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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 17:53:06,001 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-06 17:53:06,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 17:53:06,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:06,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:06,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:53:06,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:06,203 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:06,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:06,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2021-12-06 17:53:06,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:06,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277105507] [2021-12-06 17:53:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:06,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:06,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:06,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277105507] [2021-12-06 17:53:06,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277105507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:06,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189687385] [2021-12-06 17:53:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:06,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:06,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:06,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:06,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:53:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:06,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 17:53:06,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:06,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:53:06,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:53:06,603 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 17:53:06,656 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 15 treesize of output 7 [2021-12-06 17:53:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:06,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:16,815 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 21 treesize of output 19 [2021-12-06 17:53:16,820 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 68 treesize of output 66 [2021-12-06 17:53:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:16,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189687385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:16,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:16,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2021-12-06 17:53:16,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137342772] [2021-12-06 17:53:16,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:16,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:53:16,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:16,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:53:16,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=178, Unknown=4, NotChecked=0, Total=240 [2021-12-06 17:53:16,858 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:16,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:16,968 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-12-06 17:53:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:53:16,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 17:53:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:16,969 INFO L225 Difference]: With dead ends: 28 [2021-12-06 17:53:16,969 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 17:53:16,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=115, Invalid=301, Unknown=4, NotChecked=0, Total=420 [2021-12-06 17:53:16,970 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:16,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 100 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2021-12-06 17:53:16,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 17:53:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-12-06 17:53:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 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 17:53:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-12-06 17:53:16,974 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-12-06 17:53:16,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:16,974 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-12-06 17:53:16,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:16,974 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-12-06 17:53:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:53:16,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:16,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:16,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:53:17,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:17,177 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:17,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:17,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2021-12-06 17:53:17,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:17,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377618816] [2021-12-06 17:53:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:17,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:17,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:17,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377618816] [2021-12-06 17:53:17,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377618816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:17,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85149207] [2021-12-06 17:53:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:17,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:17,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:17,295 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:17,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:53:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:17,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 17:53:17,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:17,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:53:17,401 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 19 treesize of output 7 [2021-12-06 17:53:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:17,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:17,468 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 16 treesize of output 14 [2021-12-06 17:53:17,471 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 32 treesize of output 28 [2021-12-06 17:53:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:17,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85149207] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:17,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:17,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-12-06 17:53:17,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030065154] [2021-12-06 17:53:17,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:17,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:53:17,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:53:17,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:53:17,513 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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 17:53:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:17,644 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-12-06 17:53:17,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 17:53:17,645 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) Word has length 20 [2021-12-06 17:53:17,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:17,645 INFO L225 Difference]: With dead ends: 60 [2021-12-06 17:53:17,645 INFO L226 Difference]: Without dead ends: 58 [2021-12-06 17:53:17,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:53:17,647 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:17,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 67 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:53:17,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-06 17:53:17,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2021-12-06 17:53:17,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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 17:53:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-12-06 17:53:17,652 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2021-12-06 17:53:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:17,653 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-12-06 17:53:17,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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 17:53:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-12-06 17:53:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 17:53:17,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:17,654 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:17,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:53:17,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:17,855 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:17,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:17,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2021-12-06 17:53:17,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:17,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145887798] [2021-12-06 17:53:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:17,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:18,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:18,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145887798] [2021-12-06 17:53:18,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145887798] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:18,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422255353] [2021-12-06 17:53:18,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:53:18,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:18,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:18,021 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:18,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:53:18,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:53:18,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:18,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:53:18,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:18,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:18,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422255353] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:18,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:18,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-06 17:53:18,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938025504] [2021-12-06 17:53:18,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:18,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:53:18,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:53:18,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:53:18,163 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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 17:53:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:18,235 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-12-06 17:53:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 17:53:18,236 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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 24 [2021-12-06 17:53:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:18,237 INFO L225 Difference]: With dead ends: 85 [2021-12-06 17:53:18,237 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 17:53:18,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:53:18,238 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:18,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:53:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 17:53:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-12-06 17:53:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 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 17:53:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-12-06 17:53:18,245 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 24 [2021-12-06 17:53:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:18,245 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-12-06 17:53:18,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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 17:53:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-12-06 17:53:18,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 17:53:18,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:18,247 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:18,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:53:18,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:18,448 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:18,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1364521933, now seen corresponding path program 3 times [2021-12-06 17:53:18,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:18,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768272441] [2021-12-06 17:53:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:18,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:18,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:18,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768272441] [2021-12-06 17:53:18,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768272441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:18,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109258037] [2021-12-06 17:53:18,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:53:18,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:18,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:18,677 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:18,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:53:18,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 17:53:18,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:18,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 17:53:18,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:18,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:53:18,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:53:18,803 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 26 treesize of output 25 [2021-12-06 17:53:18,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:53:18,814 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 25 treesize of output 24 [2021-12-06 17:53:18,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:53:18,854 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 25 treesize of output 24 [2021-12-06 17:53:18,928 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 15 treesize of output 7 [2021-12-06 17:53:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:18,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:19,063 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 20 treesize of output 18 [2021-12-06 17:53:19,066 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 36 treesize of output 32 [2021-12-06 17:53:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:53:19,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109258037] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:19,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:19,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 21 [2021-12-06 17:53:19,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611458490] [2021-12-06 17:53:19,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:19,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 17:53:19,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:19,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 17:53:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:53:19,086 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:19,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:19,282 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-12-06 17:53:19,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 17:53:19,282 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 17:53:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:19,283 INFO L225 Difference]: With dead ends: 55 [2021-12-06 17:53:19,283 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 17:53:19,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-12-06 17:53:19,284 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:19,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 96 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:53:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 17:53:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 29. [2021-12-06 17:53:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 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 17:53:19,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-12-06 17:53:19,290 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2021-12-06 17:53:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:19,290 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-12-06 17:53:19,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:19,291 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-12-06 17:53:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 17:53:19,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:19,291 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:19,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:53:19,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:19,493 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:19,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:19,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 4 times [2021-12-06 17:53:19,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:19,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082368433] [2021-12-06 17:53:19,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:19,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:19,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:19,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082368433] [2021-12-06 17:53:19,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082368433] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:19,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091994466] [2021-12-06 17:53:19,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:53:19,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:19,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:19,628 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:19,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:53:19,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:53:19,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:19,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 17:53:19,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:19,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:53:19,742 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 19 treesize of output 7 [2021-12-06 17:53:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:19,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:19,794 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 16 treesize of output 14 [2021-12-06 17:53:19,796 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 32 treesize of output 28 [2021-12-06 17:53:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:19,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091994466] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:19,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:19,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2021-12-06 17:53:19,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445463938] [2021-12-06 17:53:19,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:19,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:53:19,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:19,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:53:19,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:53:19,830 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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 17:53:20,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:20,000 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-12-06 17:53:20,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 17:53:20,001 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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 28 [2021-12-06 17:53:20,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:20,001 INFO L225 Difference]: With dead ends: 72 [2021-12-06 17:53:20,002 INFO L226 Difference]: Without dead ends: 70 [2021-12-06 17:53:20,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-12-06 17:53:20,002 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:20,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 107 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:53:20,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-06 17:53:20,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2021-12-06 17:53:20,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-12-06 17:53:20,008 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 28 [2021-12-06 17:53:20,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:20,008 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-12-06 17:53:20,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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 17:53:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-12-06 17:53:20,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:53:20,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:20,009 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:20,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 17:53:20,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:20,211 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:20,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash 948898404, now seen corresponding path program 5 times [2021-12-06 17:53:20,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:20,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626654420] [2021-12-06 17:53:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:20,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:20,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:20,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626654420] [2021-12-06 17:53:20,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626654420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:20,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062594194] [2021-12-06 17:53:20,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:53:20,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:20,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:20,298 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:20,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:53:20,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 17:53:20,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:20,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:53:20,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:20,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:20,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062594194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:20,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:20,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2021-12-06 17:53:20,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624816392] [2021-12-06 17:53:20,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:20,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:53:20,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:20,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:53:20,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:53:20,466 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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 17:53:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:20,524 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2021-12-06 17:53:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:53:20,525 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) Word has length 32 [2021-12-06 17:53:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:20,526 INFO L225 Difference]: With dead ends: 82 [2021-12-06 17:53:20,526 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 17:53:20,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-12-06 17:53:20,527 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:20,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 53 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:53:20,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 17:53:20,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2021-12-06 17:53:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-12-06 17:53:20,534 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 32 [2021-12-06 17:53:20,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:20,534 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-12-06 17:53:20,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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 17:53:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-12-06 17:53:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 17:53:20,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:20,536 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:20,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 17:53:20,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:20,736 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:20,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:20,737 INFO L85 PathProgramCache]: Analyzing trace with hash 367413348, now seen corresponding path program 6 times [2021-12-06 17:53:20,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:20,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046534860] [2021-12-06 17:53:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:20,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:20,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046534860] [2021-12-06 17:53:20,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046534860] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227542932] [2021-12-06 17:53:20,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:53:20,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:20,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:20,871 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:20,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:53:20,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 17:53:20,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:20,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 17:53:20,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:20,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:53:21,020 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:53:21,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:53:21,036 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:53:21,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:53:21,078 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:53:21,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:53:21,141 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 19 treesize of output 7 [2021-12-06 17:53:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:21,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:23,287 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_86| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_86| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (forall ((v_ArrVal_203 Int) (v_ArrVal_205 Int)) (<= 2 (select (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_86| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0 4) v_ArrVal_203) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) v_ArrVal_205)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)))) (< 3 c_~SIZE~0)))) is different from false [2021-12-06 17:53:23,300 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 35 treesize of output 33 [2021-12-06 17:53:23,308 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 396 treesize of output 388 [2021-12-06 17:53:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-06 17:53:23,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227542932] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:23,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:23,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 16] total 24 [2021-12-06 17:53:23,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919866460] [2021-12-06 17:53:23,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:23,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 17:53:23,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:23,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 17:53:23,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=424, Unknown=1, NotChecked=42, Total=552 [2021-12-06 17:53:23,454 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:25,509 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))))) (and (= .cse0 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| .cse0) (= (* 4 |c_ULTIMATE.start_main_~i~0#1|) 8) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~SIZE~0) (forall ((|v_ULTIMATE.start_main_~i~0#1_86| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_86| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (forall ((v_ArrVal_203 Int) (v_ArrVal_205 Int)) (<= 2 (select (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_86| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 4) v_ArrVal_203) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1) v_ArrVal_205)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)))) (< 3 c_~SIZE~0)))))) is different from false [2021-12-06 17:53:25,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:25,660 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-12-06 17:53:25,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 17:53:25,660 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-06 17:53:25,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:25,661 INFO L225 Difference]: With dead ends: 88 [2021-12-06 17:53:25,661 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 17:53:25,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=185, Invalid=1153, Unknown=2, NotChecked=142, Total=1482 [2021-12-06 17:53:25,662 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:25,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 135 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 306 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2021-12-06 17:53:25,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 17:53:25,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 49. [2021-12-06 17:53:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 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 17:53:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-12-06 17:53:25,667 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 36 [2021-12-06 17:53:25,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:25,668 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-12-06 17:53:25,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:25,668 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-12-06 17:53:25,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 17:53:25,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:25,669 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:25,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 17:53:25,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 17:53:25,870 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:25,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:25,870 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 7 times [2021-12-06 17:53:25,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:25,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194373837] [2021-12-06 17:53:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:25,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:26,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:26,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194373837] [2021-12-06 17:53:26,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194373837] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:26,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815045593] [2021-12-06 17:53:26,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:53:26,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:26,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:26,041 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:26,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 17:53:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:26,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:53:26,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:26,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:53:26,220 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 19 treesize of output 7 [2021-12-06 17:53:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:26,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:26,302 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 16 treesize of output 14 [2021-12-06 17:53:26,304 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 32 treesize of output 28 [2021-12-06 17:53:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:26,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815045593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:26,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:26,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2021-12-06 17:53:26,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020736952] [2021-12-06 17:53:26,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:26,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 17:53:26,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:26,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 17:53:26,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-12-06 17:53:26,336 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 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 17:53:26,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:26,641 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2021-12-06 17:53:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 17:53:26,642 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 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 36 [2021-12-06 17:53:26,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:26,642 INFO L225 Difference]: With dead ends: 86 [2021-12-06 17:53:26,642 INFO L226 Difference]: Without dead ends: 84 [2021-12-06 17:53:26,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 17:53:26,643 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:26,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 247 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:53:26,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-06 17:53:26,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 53. [2021-12-06 17:53:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 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 17:53:26,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-12-06 17:53:26,649 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 36 [2021-12-06 17:53:26,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:26,649 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-12-06 17:53:26,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 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 17:53:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-12-06 17:53:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 17:53:26,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:26,650 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:26,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 17:53:26,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:26,851 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:26,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1789893985, now seen corresponding path program 8 times [2021-12-06 17:53:26,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:26,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224883322] [2021-12-06 17:53:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:26,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 4 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:27,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:27,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224883322] [2021-12-06 17:53:27,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224883322] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:27,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397609646] [2021-12-06 17:53:27,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:53:27,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:27,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:27,023 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:27,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 17:53:27,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:53:27,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:27,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 17:53:27,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:27,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:53:27,122 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:53:27,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:53:27,133 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:53:27,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:53:27,159 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:53:27,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:53:27,187 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:53:27,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:53:27,215 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:53:27,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:53:27,269 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 19 treesize of output 7 [2021-12-06 17:53:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:27,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:27,430 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 20 treesize of output 18 [2021-12-06 17:53:27,432 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 36 treesize of output 32 [2021-12-06 17:53:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:53:27,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397609646] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:27,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:27,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2021-12-06 17:53:27,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812662504] [2021-12-06 17:53:27,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:27,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 17:53:27,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:27,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 17:53:27,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:53:27,467 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 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 17:53:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:27,705 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2021-12-06 17:53:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:53:27,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 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 40 [2021-12-06 17:53:27,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:27,706 INFO L225 Difference]: With dead ends: 85 [2021-12-06 17:53:27,706 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 17:53:27,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 64 SyntacticMatches, 15 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2021-12-06 17:53:27,707 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:27,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 149 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:53:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 17:53:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2021-12-06 17:53:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 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 17:53:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-12-06 17:53:27,714 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 40 [2021-12-06 17:53:27,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:27,714 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-12-06 17:53:27,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 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 17:53:27,714 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-12-06 17:53:27,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 17:53:27,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:27,715 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:27,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 17:53:27,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 17:53:27,916 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:27,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:27,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1942581397, now seen corresponding path program 9 times [2021-12-06 17:53:27,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:27,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433888848] [2021-12-06 17:53:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:27,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:27,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:27,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433888848] [2021-12-06 17:53:27,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433888848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:27,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160473987] [2021-12-06 17:53:27,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:53:27,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:27,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:27,977 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:27,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 17:53:28,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 17:53:28,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:28,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:53:28,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:28,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:28,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160473987] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:28,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:28,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2021-12-06 17:53:28,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753973188] [2021-12-06 17:53:28,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:28,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 17:53:28,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:28,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 17:53:28,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:53:28,169 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:28,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:28,253 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2021-12-06 17:53:28,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:53:28,254 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-06 17:53:28,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:28,254 INFO L225 Difference]: With dead ends: 98 [2021-12-06 17:53:28,254 INFO L226 Difference]: Without dead ends: 71 [2021-12-06 17:53:28,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-12-06 17:53:28,255 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:28,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 85 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:53:28,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-06 17:53:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2021-12-06 17:53:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-12-06 17:53:28,260 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 40 [2021-12-06 17:53:28,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:28,260 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-12-06 17:53:28,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:28,261 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-12-06 17:53:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 17:53:28,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:28,261 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:28,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 17:53:28,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 17:53:28,462 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:28,464 INFO L85 PathProgramCache]: Analyzing trace with hash -470542059, now seen corresponding path program 10 times [2021-12-06 17:53:28,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:28,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29917462] [2021-12-06 17:53:28,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:28,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:28,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:28,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29917462] [2021-12-06 17:53:28,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29917462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:28,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378384186] [2021-12-06 17:53:28,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:53:28,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:28,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:28,687 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:28,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 17:53:28,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:53:28,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 17:53:28,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:28,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:53:28,808 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:53:28,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:53:28,819 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:53:28,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:53:28,845 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:53:28,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:53:28,931 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 19 treesize of output 7 [2021-12-06 17:53:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 3 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:28,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:31,051 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_152| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_152| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_390 Int)) (<= 3 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_152| 4)) v_ArrVal_390) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)))))) is different from false [2021-12-06 17:53:40,255 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_153| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_153| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_387 Int) (v_ArrVal_385 Int) (|v_ULTIMATE.start_main_~i~0#1_152| Int) (v_ArrVal_390 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_152| (+ |v_ULTIMATE.start_main_~i~0#1_153| 1)) (<= 3 (select (store (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_153| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4 .cse0) v_ArrVal_385) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) v_ArrVal_387)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_152| 4)) v_ArrVal_390) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12))))))) is different from false [2021-12-06 17:53:40,266 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 38 treesize of output 36 [2021-12-06 17:53:40,269 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 386 treesize of output 382 [2021-12-06 17:53:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-12-06 17:53:40,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378384186] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:40,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:40,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 17] total 36 [2021-12-06 17:53:40,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111689373] [2021-12-06 17:53:40,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:40,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 17:53:40,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:40,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 17:53:40,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=968, Unknown=15, NotChecked=130, Total=1260 [2021-12-06 17:53:40,398 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 36 states, 36 states have (on average 3.0) internal successors, (108), 36 states have internal predecessors, (108), 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 17:53:42,494 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (forall ((|v_ULTIMATE.start_main_~i~0#1_153| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_153| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_387 Int) (v_ArrVal_385 Int) (|v_ULTIMATE.start_main_~i~0#1_152| Int) (v_ArrVal_390 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_152| (+ |v_ULTIMATE.start_main_~i~0#1_153| 1)) (<= 3 (select (store (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_153| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4 .cse0) v_ArrVal_385) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) v_ArrVal_387)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_152| 4)) v_ArrVal_390) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12))))))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) |c_ULTIMATE.start_main_~i~0#1|) (<= 3 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-12-06 17:53:44,519 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 3 (select .cse0 12)) (forall ((|v_ULTIMATE.start_main_~i~0#1_152| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_152| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_390 Int)) (<= 3 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_152| 4)) v_ArrVal_390) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)))))) (<= (+ (div (+ (* |c_ULTIMATE.start_main_~a~0#1.offset| (- 1)) 12) 4) 1) |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))))) is different from false [2021-12-06 17:53:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:44,748 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2021-12-06 17:53:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:53:44,748 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0) internal successors, (108), 36 states have internal predecessors, (108), 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 44 [2021-12-06 17:53:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:44,749 INFO L225 Difference]: With dead ends: 78 [2021-12-06 17:53:44,749 INFO L226 Difference]: Without dead ends: 76 [2021-12-06 17:53:44,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=276, Invalid=1793, Unknown=17, NotChecked=364, Total=2450 [2021-12-06 17:53:44,750 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:44,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 251 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 640 Invalid, 0 Unknown, 164 Unchecked, 0.2s Time] [2021-12-06 17:53:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-06 17:53:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 45. [2021-12-06 17:53:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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 17:53:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-12-06 17:53:44,754 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2021-12-06 17:53:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:44,754 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-12-06 17:53:44,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0) internal successors, (108), 36 states have internal predecessors, (108), 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 17:53:44,755 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-12-06 17:53:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 17:53:44,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:44,755 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:44,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 17:53:44,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 17:53:44,956 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:44,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:44,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 11 times [2021-12-06 17:53:44,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:44,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730340534] [2021-12-06 17:53:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:44,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:45,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:45,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730340534] [2021-12-06 17:53:45,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730340534] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:45,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377117617] [2021-12-06 17:53:45,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:53:45,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:45,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:45,113 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:45,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 17:53:45,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 17:53:45,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:45,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:53:45,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:45,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:53:45,553 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 17:53:45,553 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 23 treesize of output 10 [2021-12-06 17:53:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:45,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:47,843 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 21 treesize of output 19 [2021-12-06 17:53:47,845 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 45 treesize of output 38 [2021-12-06 17:53:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:47,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377117617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:47,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:47,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2021-12-06 17:53:47,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747183832] [2021-12-06 17:53:47,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:47,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 17:53:47,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:47,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 17:53:47,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1038, Unknown=1, NotChecked=0, Total=1190 [2021-12-06 17:53:47,918 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 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 17:53:48,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:48,354 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2021-12-06 17:53:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 17:53:48,354 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 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 44 [2021-12-06 17:53:48,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:48,355 INFO L225 Difference]: With dead ends: 102 [2021-12-06 17:53:48,355 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 17:53:48,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=348, Invalid=2513, Unknown=1, NotChecked=0, Total=2862 [2021-12-06 17:53:48,356 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:48,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 206 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 431 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2021-12-06 17:53:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 17:53:48,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2021-12-06 17:53:48,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-12-06 17:53:48,362 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 44 [2021-12-06 17:53:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:48,362 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-12-06 17:53:48,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 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 17:53:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-12-06 17:53:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 17:53:48,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:48,363 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:48,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 17:53:48,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 17:53:48,564 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:48,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:48,565 INFO L85 PathProgramCache]: Analyzing trace with hash 730938950, now seen corresponding path program 12 times [2021-12-06 17:53:48,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:48,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654924711] [2021-12-06 17:53:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:48,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:48,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:48,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654924711] [2021-12-06 17:53:48,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654924711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:48,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832891743] [2021-12-06 17:53:48,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:53:48,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:48,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:48,823 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:48,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 17:53:48,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 17:53:48,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:48,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 17:53:48,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:49,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:53:49,071 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:53:49,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:53:49,081 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:53:49,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:53:49,111 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:53:49,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:53:49,242 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 19 treesize of output 7 [2021-12-06 17:53:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 3 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:49,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:51,418 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_194| Int)) (or (forall ((v_ArrVal_495 Int)) (<= 4 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_194| 4)) v_ArrVal_495) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)))) (< |v_ULTIMATE.start_main_~i~0#1_194| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 17:53:53,364 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 20 treesize of output 18 [2021-12-06 17:53:53,366 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 36 treesize of output 32 [2021-12-06 17:53:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-12-06 17:53:53,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832891743] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:53,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:53,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 18] total 39 [2021-12-06 17:53:53,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50224259] [2021-12-06 17:53:53,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:53,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 17:53:53,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:53,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 17:53:53,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1269, Unknown=1, NotChecked=72, Total=1482 [2021-12-06 17:53:53,401 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 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 17:53:55,579 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_194| Int)) (or (forall ((v_ArrVal_495 Int)) (<= 4 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_194| 4)) v_ArrVal_495) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)))) (< |v_ULTIMATE.start_main_~i~0#1_194| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= 4 (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16))) (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))))) is different from false [2021-12-06 17:53:57,636 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_194| Int)) (or (forall ((v_ArrVal_495 Int)) (<= 4 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_194| 4)) v_ArrVal_495) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16)))) (< |v_ULTIMATE.start_main_~i~0#1_194| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= 4 (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16))) (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (<= 6 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2021-12-06 17:53:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:57,896 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2021-12-06 17:53:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 17:53:57,896 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 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 52 [2021-12-06 17:53:57,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:57,897 INFO L225 Difference]: With dead ends: 91 [2021-12-06 17:53:57,897 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 17:53:57,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=323, Invalid=2656, Unknown=3, NotChecked=324, Total=3306 [2021-12-06 17:53:57,898 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 72 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:57,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 273 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 808 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2021-12-06 17:53:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 17:53:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 53. [2021-12-06 17:53:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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 17:53:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-12-06 17:53:57,904 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2021-12-06 17:53:57,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:57,905 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-12-06 17:53:57,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 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 17:53:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-12-06 17:53:57,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 17:53:57,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:57,905 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:57,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 17:53:58,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:58,106 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:58,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:58,107 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 13 times [2021-12-06 17:53:58,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:58,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031836755] [2021-12-06 17:53:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:58,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:58,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:58,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031836755] [2021-12-06 17:53:58,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031836755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:58,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273018351] [2021-12-06 17:53:58,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:53:58,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:58,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:58,284 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:58,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 17:53:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:58,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 17:53:58,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:58,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:53:58,510 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 19 treesize of output 7 [2021-12-06 17:53:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:58,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:58,589 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 16 treesize of output 14 [2021-12-06 17:53:58,591 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 32 treesize of output 28 [2021-12-06 17:53:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:58,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273018351] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:58,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:58,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2021-12-06 17:53:58,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480323895] [2021-12-06 17:53:58,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:58,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 17:53:58,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:58,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 17:53:58,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-12-06 17:53:58,651 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 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 17:53:59,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:59,052 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2021-12-06 17:53:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 17:53:59,052 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 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 52 [2021-12-06 17:53:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:59,053 INFO L225 Difference]: With dead ends: 108 [2021-12-06 17:53:59,053 INFO L226 Difference]: Without dead ends: 106 [2021-12-06 17:53:59,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=1784, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 17:53:59,054 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:59,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 269 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:53:59,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-06 17:53:59,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 69. [2021-12-06 17:53:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 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 17:53:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-12-06 17:53:59,060 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 52 [2021-12-06 17:53:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:59,060 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-12-06 17:53:59,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 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 17:53:59,060 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-12-06 17:53:59,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 17:53:59,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:59,061 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:59,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-06 17:53:59,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 17:53:59,262 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:59,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:59,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 14 times [2021-12-06 17:53:59,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:59,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138674497] [2021-12-06 17:53:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:59,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:59,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:59,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138674497] [2021-12-06 17:53:59,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138674497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:59,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713639316] [2021-12-06 17:53:59,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:53:59,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:59,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:59,385 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:59,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 17:53:59,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:53:59,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:59,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 17:53:59,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:59,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:59,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713639316] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:59,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:59,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2021-12-06 17:53:59,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958292833] [2021-12-06 17:53:59,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:59,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 17:53:59,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:59,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 17:53:59,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-12-06 17:53:59,625 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 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 17:53:59,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:59,724 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2021-12-06 17:53:59,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 17:53:59,725 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-06 17:53:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:59,725 INFO L225 Difference]: With dead ends: 130 [2021-12-06 17:53:59,725 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 17:53:59,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2021-12-06 17:53:59,726 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 112 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:59,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 76 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:53:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 17:53:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2021-12-06 17:53:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 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 17:53:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-12-06 17:53:59,732 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 56 [2021-12-06 17:53:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:59,732 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-12-06 17:53:59,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 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 17:53:59,733 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-12-06 17:53:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 17:53:59,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:59,733 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:59,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 17:53:59,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 17:53:59,934 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:59,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:59,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2011531273, now seen corresponding path program 15 times [2021-12-06 17:53:59,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:59,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076853474] [2021-12-06 17:53:59,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:59,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:00,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:00,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076853474] [2021-12-06 17:54:00,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076853474] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:00,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071420507] [2021-12-06 17:54:00,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:54:00,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:00,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:00,150 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:00,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 17:54:00,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 17:54:00,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:00,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 17:54:00,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:00,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:54:00,380 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:54:00,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:54:00,389 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:54:00,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:54:00,416 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:54:00,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:54:00,523 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 19 treesize of output 7 [2021-12-06 17:54:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 3 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:00,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:00,686 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 20 treesize of output 18 [2021-12-06 17:54:00,688 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 36 treesize of output 32 [2021-12-06 17:54:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:54:00,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071420507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:00,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:00,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 19] total 28 [2021-12-06 17:54:00,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949027860] [2021-12-06 17:54:00,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:00,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 17:54:00,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:00,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 17:54:00,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-12-06 17:54:00,746 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 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 17:54:01,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:01,162 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2021-12-06 17:54:01,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 17:54:01,163 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 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 60 [2021-12-06 17:54:01,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:01,164 INFO L225 Difference]: With dead ends: 103 [2021-12-06 17:54:01,164 INFO L226 Difference]: Without dead ends: 101 [2021-12-06 17:54:01,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 102 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 17:54:01,165 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:01,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 284 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:54:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-06 17:54:01,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 61. [2021-12-06 17:54:01,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 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 17:54:01,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-12-06 17:54:01,174 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2021-12-06 17:54:01,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:01,174 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-12-06 17:54:01,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 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 17:54:01,175 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-12-06 17:54:01,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 17:54:01,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:01,175 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:01,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 17:54:01,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:01,376 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:01,377 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 16 times [2021-12-06 17:54:01,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:01,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958818936] [2021-12-06 17:54:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:01,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:01,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:01,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958818936] [2021-12-06 17:54:01,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958818936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:01,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224633896] [2021-12-06 17:54:01,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:54:01,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:01,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:01,556 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:01,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 17:54:01,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:54:01,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:01,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 17:54:01,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:01,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:54:01,794 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 19 treesize of output 7 [2021-12-06 17:54:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:01,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:01,879 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 16 treesize of output 14 [2021-12-06 17:54:01,880 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 32 treesize of output 28 [2021-12-06 17:54:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:01,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224633896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:01,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:01,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 26 [2021-12-06 17:54:01,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342405298] [2021-12-06 17:54:01,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:01,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 17:54:01,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:01,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 17:54:01,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-12-06 17:54:01,953 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 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 17:54:02,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:02,459 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2021-12-06 17:54:02,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 17:54:02,459 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 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 60 [2021-12-06 17:54:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:02,460 INFO L225 Difference]: With dead ends: 120 [2021-12-06 17:54:02,460 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 17:54:02,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 106 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=2235, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 17:54:02,461 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:02,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 306 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:54:02,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 17:54:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2021-12-06 17:54:02,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 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 17:54:02,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-12-06 17:54:02,468 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 60 [2021-12-06 17:54:02,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:02,469 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-12-06 17:54:02,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 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 17:54:02,469 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-12-06 17:54:02,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:54:02,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:02,469 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:02,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 17:54:02,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-06 17:54:02,671 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:02,672 INFO L85 PathProgramCache]: Analyzing trace with hash 313400872, now seen corresponding path program 17 times [2021-12-06 17:54:02,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:02,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660433638] [2021-12-06 17:54:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:02,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:02,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:02,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660433638] [2021-12-06 17:54:02,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660433638] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:02,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006158012] [2021-12-06 17:54:02,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:54:02,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:02,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:02,802 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:02,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 17:54:02,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 17:54:02,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:02,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 17:54:02,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:03,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:03,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006158012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:03,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:03,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2021-12-06 17:54:03,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058794486] [2021-12-06 17:54:03,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:03,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 17:54:03,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:03,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 17:54:03,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-12-06 17:54:03,197 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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 17:54:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:03,326 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2021-12-06 17:54:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:54:03,326 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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 64 [2021-12-06 17:54:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:03,327 INFO L225 Difference]: With dead ends: 146 [2021-12-06 17:54:03,327 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 17:54:03,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 17:54:03,328 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 137 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:03,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 149 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:54:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 17:54:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2021-12-06 17:54:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 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 17:54:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-12-06 17:54:03,335 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 64 [2021-12-06 17:54:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:03,335 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-12-06 17:54:03,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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 17:54:03,335 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-12-06 17:54:03,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 17:54:03,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:03,336 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:03,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-06 17:54:03,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:03,537 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:03,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash -846428632, now seen corresponding path program 18 times [2021-12-06 17:54:03,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:03,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306089117] [2021-12-06 17:54:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:03,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:03,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:03,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306089117] [2021-12-06 17:54:03,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306089117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:03,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653551466] [2021-12-06 17:54:03,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:54:03,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:03,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:03,831 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:03,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 17:54:04,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-06 17:54:04,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:04,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 17:54:04,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:04,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:54:04,150 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:54:04,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:54:04,160 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:54:04,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:54:04,191 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:54:04,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:54:04,340 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 19 treesize of output 7 [2021-12-06 17:54:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 3 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:04,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:04,523 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 20 treesize of output 18 [2021-12-06 17:54:04,525 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 36 treesize of output 32 [2021-12-06 17:54:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:54:04,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653551466] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:04,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:04,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 30 [2021-12-06 17:54:04,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642643296] [2021-12-06 17:54:04,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:04,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 17:54:04,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:04,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 17:54:04,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-12-06 17:54:04,588 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 30 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 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 17:54:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:05,099 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2021-12-06 17:54:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 17:54:05,099 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 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 68 [2021-12-06 17:54:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:05,100 INFO L225 Difference]: With dead ends: 115 [2021-12-06 17:54:05,100 INFO L226 Difference]: Without dead ends: 113 [2021-12-06 17:54:05,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 17:54:05,101 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:05,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 455 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:54:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-06 17:54:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2021-12-06 17:54:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 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 17:54:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-12-06 17:54:05,112 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2021-12-06 17:54:05,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:05,112 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-12-06 17:54:05,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 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 17:54:05,112 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-12-06 17:54:05,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 17:54:05,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:05,113 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:05,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 17:54:05,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 17:54:05,314 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:05,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:05,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1370939875, now seen corresponding path program 19 times [2021-12-06 17:54:05,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:05,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145350559] [2021-12-06 17:54:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:05,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:05,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:05,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145350559] [2021-12-06 17:54:05,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145350559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:05,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495639049] [2021-12-06 17:54:05,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:54:05,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:05,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:05,574 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:05,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 17:54:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:05,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 17:54:05,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:05,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:54:05,920 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 19 treesize of output 7 [2021-12-06 17:54:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:05,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:06,003 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 16 treesize of output 14 [2021-12-06 17:54:06,005 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 32 treesize of output 28 [2021-12-06 17:54:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:06,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495639049] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:06,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:06,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 30 [2021-12-06 17:54:06,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345207598] [2021-12-06 17:54:06,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:06,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 17:54:06,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:06,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 17:54:06,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-12-06 17:54:06,078 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 30 states, 30 states have (on average 3.433333333333333) internal successors, (103), 30 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:06,671 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2021-12-06 17:54:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 17:54:06,672 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.433333333333333) internal successors, (103), 30 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 17:54:06,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:06,672 INFO L225 Difference]: With dead ends: 132 [2021-12-06 17:54:06,672 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 17:54:06,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=2944, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 17:54:06,674 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 84 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:06,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 413 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:54:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 17:54:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 85. [2021-12-06 17:54:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 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 17:54:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-12-06 17:54:06,683 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 68 [2021-12-06 17:54:06,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:06,683 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-12-06 17:54:06,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.433333333333333) internal successors, (103), 30 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:06,683 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-12-06 17:54:06,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 17:54:06,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:06,683 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:06,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 17:54:06,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 17:54:06,885 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:06,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:06,886 INFO L85 PathProgramCache]: Analyzing trace with hash -20883879, now seen corresponding path program 20 times [2021-12-06 17:54:06,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:06,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849606336] [2021-12-06 17:54:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:06,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:07,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:07,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849606336] [2021-12-06 17:54:07,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849606336] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:07,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166619097] [2021-12-06 17:54:07,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:54:07,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:07,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:07,027 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:07,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 17:54:07,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:54:07,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:07,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 17:54:07,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:07,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:07,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166619097] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:07,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:07,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2021-12-06 17:54:07,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237196752] [2021-12-06 17:54:07,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:07,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 17:54:07,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 17:54:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2021-12-06 17:54:07,366 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 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 17:54:07,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:07,542 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2021-12-06 17:54:07,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:54:07,542 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 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 72 [2021-12-06 17:54:07,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:07,543 INFO L225 Difference]: With dead ends: 162 [2021-12-06 17:54:07,543 INFO L226 Difference]: Without dead ends: 119 [2021-12-06 17:54:07,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 17:54:07,544 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 166 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:07,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 133 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:54:07,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-06 17:54:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2021-12-06 17:54:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 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 17:54:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-12-06 17:54:07,553 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 72 [2021-12-06 17:54:07,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:07,553 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-12-06 17:54:07,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 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 17:54:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-12-06 17:54:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 17:54:07,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:07,554 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:07,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 17:54:07,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:07,755 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:07,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:07,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1199298343, now seen corresponding path program 21 times [2021-12-06 17:54:07,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:07,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205114933] [2021-12-06 17:54:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:07,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:08,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:08,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205114933] [2021-12-06 17:54:08,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205114933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:08,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341180181] [2021-12-06 17:54:08,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:54:08,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:08,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:08,054 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:08,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 17:54:08,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 17:54:08,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:08,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 17:54:08,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:08,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:54:08,501 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:54:08,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:54:08,510 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:54:08,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:54:08,544 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:54:08,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:54:08,719 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 19 treesize of output 7 [2021-12-06 17:54:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 3 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:08,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:08,913 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 20 treesize of output 18 [2021-12-06 17:54:08,914 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 36 treesize of output 32 [2021-12-06 17:54:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:54:08,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341180181] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:08,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:08,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 34 [2021-12-06 17:54:08,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098386871] [2021-12-06 17:54:08,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:08,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 17:54:08,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:08,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 17:54:08,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 17:54:08,982 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 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 17:54:09,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:09,569 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2021-12-06 17:54:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 17:54:09,570 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 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 76 [2021-12-06 17:54:09,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:09,570 INFO L225 Difference]: With dead ends: 127 [2021-12-06 17:54:09,571 INFO L226 Difference]: Without dead ends: 125 [2021-12-06 17:54:09,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 17:54:09,572 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 81 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:09,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 509 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:54:09,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-06 17:54:09,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 77. [2021-12-06 17:54:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 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 17:54:09,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-12-06 17:54:09,581 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2021-12-06 17:54:09,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:09,581 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-12-06 17:54:09,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 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 17:54:09,581 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-12-06 17:54:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 17:54:09,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:09,582 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:09,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 17:54:09,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:09,783 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:09,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:09,784 INFO L85 PathProgramCache]: Analyzing trace with hash 609496852, now seen corresponding path program 22 times [2021-12-06 17:54:09,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:09,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906364610] [2021-12-06 17:54:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:09,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:10,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:10,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906364610] [2021-12-06 17:54:10,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906364610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:10,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871822464] [2021-12-06 17:54:10,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:54:10,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:10,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:10,029 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:10,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 17:54:10,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:54:10,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:10,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 17:54:10,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:10,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:54:10,395 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 19 treesize of output 7 [2021-12-06 17:54:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:10,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:10,498 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 16 treesize of output 14 [2021-12-06 17:54:10,500 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 32 treesize of output 28 [2021-12-06 17:54:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:10,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871822464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:10,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:10,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 32 [2021-12-06 17:54:10,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520847726] [2021-12-06 17:54:10,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:10,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 17:54:10,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:10,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 17:54:10,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-12-06 17:54:10,584 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 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 17:54:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:11,302 INFO L93 Difference]: Finished difference Result 144 states and 147 transitions. [2021-12-06 17:54:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 17:54:11,302 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 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 76 [2021-12-06 17:54:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:11,303 INFO L225 Difference]: With dead ends: 144 [2021-12-06 17:54:11,303 INFO L226 Difference]: Without dead ends: 142 [2021-12-06 17:54:11,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=3515, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 17:54:11,304 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 92 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:11,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 505 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:54:11,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-06 17:54:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 93. [2021-12-06 17:54:11,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 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 17:54:11,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2021-12-06 17:54:11,315 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 76 [2021-12-06 17:54:11,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:11,315 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2021-12-06 17:54:11,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 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 17:54:11,315 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2021-12-06 17:54:11,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 17:54:11,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:11,316 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:11,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 17:54:11,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 17:54:11,517 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:11,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:11,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2057478922, now seen corresponding path program 23 times [2021-12-06 17:54:11,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:11,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971546392] [2021-12-06 17:54:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:11,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 129 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:11,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:11,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971546392] [2021-12-06 17:54:11,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971546392] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:11,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324588097] [2021-12-06 17:54:11,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:54:11,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:11,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:11,682 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:11,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 17:54:11,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 17:54:11,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:11,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 17:54:11,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:12,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:12,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324588097] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:12,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:12,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2021-12-06 17:54:12,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123495516] [2021-12-06 17:54:12,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:12,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 17:54:12,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:12,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 17:54:12,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 17:54:12,267 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:12,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:12,428 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2021-12-06 17:54:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 17:54:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-06 17:54:12,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:12,429 INFO L225 Difference]: With dead ends: 178 [2021-12-06 17:54:12,429 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 17:54:12,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 17:54:12,430 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 183 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:12,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 155 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:54:12,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 17:54:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-12-06 17:54:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 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 17:54:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2021-12-06 17:54:12,441 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 80 [2021-12-06 17:54:12,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:12,441 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2021-12-06 17:54:12,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:12,441 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2021-12-06 17:54:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 17:54:12,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:12,441 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:12,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 17:54:12,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 17:54:12,643 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:12,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1640095734, now seen corresponding path program 24 times [2021-12-06 17:54:12,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:12,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355529993] [2021-12-06 17:54:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:12,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:13,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:13,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355529993] [2021-12-06 17:54:13,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355529993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:13,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043294382] [2021-12-06 17:54:13,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:54:13,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:13,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:13,058 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:13,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 17:54:13,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-06 17:54:13,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:13,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 17:54:13,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:13,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:54:13,725 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:54:13,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:54:13,734 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:54:13,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:54:13,787 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-12-06 17:54:13,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-06 17:54:14,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:54:14,369 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 30 treesize of output 24 [2021-12-06 17:54:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 1 proven. 358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:14,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:58,199 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 30 treesize of output 28 [2021-12-06 17:54:58,203 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 794 treesize of output 778 [2021-12-06 17:54:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 354 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:58,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043294382] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:58,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:58,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 27] total 65 [2021-12-06 17:54:58,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534832426] [2021-12-06 17:54:58,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:58,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 17:54:58,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 17:54:58,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=3763, Unknown=19, NotChecked=0, Total=4160 [2021-12-06 17:54:58,522 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 states have internal predecessors, (210), 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 17:55:11,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:11,172 INFO L93 Difference]: Finished difference Result 218 states and 223 transitions. [2021-12-06 17:55:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-06 17:55:11,172 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 states have internal predecessors, (210), 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 84 [2021-12-06 17:55:11,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:11,173 INFO L225 Difference]: With dead ends: 218 [2021-12-06 17:55:11,173 INFO L226 Difference]: Without dead ends: 216 [2021-12-06 17:55:11,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 132 SyntacticMatches, 9 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 56.5s TimeCoverageRelationStatistics Valid=1164, Invalid=11694, Unknown=24, NotChecked=0, Total=12882 [2021-12-06 17:55:11,174 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 155 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:11,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 705 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1414 Invalid, 0 Unknown, 377 Unchecked, 0.4s Time] [2021-12-06 17:55:11,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-06 17:55:11,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 105. [2021-12-06 17:55:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0576923076923077) internal successors, (110), 104 states have internal predecessors, (110), 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 17:55:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2021-12-06 17:55:11,189 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 84 [2021-12-06 17:55:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:11,189 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2021-12-06 17:55:11,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 states have internal predecessors, (210), 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 17:55:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2021-12-06 17:55:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 17:55:11,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:11,190 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:11,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 17:55:11,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 17:55:11,391 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:11,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:11,392 INFO L85 PathProgramCache]: Analyzing trace with hash -103116603, now seen corresponding path program 25 times [2021-12-06 17:55:11,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:11,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134807310] [2021-12-06 17:55:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:11,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:11,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:11,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134807310] [2021-12-06 17:55:11,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134807310] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:11,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548235686] [2021-12-06 17:55:11,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:55:11,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:11,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:11,724 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:11,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 17:55:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:11,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 17:55:11,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:11,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:55:12,147 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 19 treesize of output 7 [2021-12-06 17:55:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:12,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:12,463 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 16 treesize of output 14 [2021-12-06 17:55:12,465 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 32 treesize of output 28 [2021-12-06 17:55:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:12,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548235686] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:12,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:12,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 47 [2021-12-06 17:55:12,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338654061] [2021-12-06 17:55:12,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:12,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 17:55:12,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 17:55:12,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2019, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 17:55:12,578 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand has 47 states, 47 states have (on average 3.4893617021276597) internal successors, (164), 47 states have internal predecessors, (164), 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 17:55:13,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:13,801 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2021-12-06 17:55:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 17:55:13,802 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.4893617021276597) internal successors, (164), 47 states have internal predecessors, (164), 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 84 [2021-12-06 17:55:13,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:13,803 INFO L225 Difference]: With dead ends: 204 [2021-12-06 17:55:13,803 INFO L226 Difference]: Without dead ends: 202 [2021-12-06 17:55:13,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 140 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=437, Invalid=7219, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 17:55:13,804 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 133 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:13,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 784 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:55:13,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-06 17:55:13,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 113. [2021-12-06 17:55:13,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0535714285714286) internal successors, (118), 112 states have internal predecessors, (118), 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 17:55:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2021-12-06 17:55:13,818 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 84 [2021-12-06 17:55:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:13,818 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2021-12-06 17:55:13,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.4893617021276597) internal successors, (164), 47 states have internal predecessors, (164), 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 17:55:13,819 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2021-12-06 17:55:13,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 17:55:13,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:13,819 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:13,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-06 17:55:14,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 17:55:14,020 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:14,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:14,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2110702651, now seen corresponding path program 26 times [2021-12-06 17:55:14,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:14,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140613973] [2021-12-06 17:55:14,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:14,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 163 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:14,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:14,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140613973] [2021-12-06 17:55:14,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140613973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:14,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272061781] [2021-12-06 17:55:14,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:55:14,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:14,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:14,193 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:14,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 17:55:14,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:55:14,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:14,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:55:14,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:14,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:14,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272061781] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:14,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:14,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 37 [2021-12-06 17:55:14,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427801049] [2021-12-06 17:55:14,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:14,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 17:55:14,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:14,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 17:55:14,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 17:55:14,585 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 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 17:55:14,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:14,774 INFO L93 Difference]: Finished difference Result 242 states and 247 transitions. [2021-12-06 17:55:14,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 17:55:14,774 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 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 88 [2021-12-06 17:55:14,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:14,775 INFO L225 Difference]: With dead ends: 242 [2021-12-06 17:55:14,775 INFO L226 Difference]: Without dead ends: 191 [2021-12-06 17:55:14,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=537, Invalid=1719, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 17:55:14,776 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 230 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:14,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 171 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:55:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-06 17:55:14,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 113. [2021-12-06 17:55:14,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0446428571428572) internal successors, (117), 112 states have internal predecessors, (117), 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 17:55:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2021-12-06 17:55:14,791 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 88 [2021-12-06 17:55:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:14,791 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2021-12-06 17:55:14,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 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 17:55:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2021-12-06 17:55:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 17:55:14,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:14,792 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:14,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 17:55:14,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:14,993 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:14,995 INFO L85 PathProgramCache]: Analyzing trace with hash 479669179, now seen corresponding path program 27 times [2021-12-06 17:55:14,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:14,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416762215] [2021-12-06 17:55:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:14,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 438 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:15,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:15,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416762215] [2021-12-06 17:55:15,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416762215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:15,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894682462] [2021-12-06 17:55:15,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:55:15,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:15,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:15,390 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:15,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 17:55:16,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-06 17:55:16,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:16,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 17:55:16,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:16,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:55:16,261 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:55:16,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:55:16,269 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:55:16,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:55:16,302 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:55:16,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:55:16,552 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 19 treesize of output 7 [2021-12-06 17:55:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 3 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:16,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:16,771 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 20 treesize of output 18 [2021-12-06 17:55:16,773 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 36 treesize of output 32 [2021-12-06 17:55:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 437 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:55:16,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894682462] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:16,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:16,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 40 [2021-12-06 17:55:16,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565386195] [2021-12-06 17:55:16,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:16,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 17:55:16,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:16,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 17:55:16,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 17:55:16,861 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 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 17:55:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:17,738 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2021-12-06 17:55:17,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 17:55:17,739 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 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 92 [2021-12-06 17:55:17,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:17,740 INFO L225 Difference]: With dead ends: 197 [2021-12-06 17:55:17,740 INFO L226 Difference]: Without dead ends: 195 [2021-12-06 17:55:17,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 162 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=3861, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 17:55:17,740 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 89 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1978 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:17,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 710 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1978 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:55:17,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-06 17:55:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2021-12-06 17:55:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0422535211267605) internal successors, (148), 142 states have internal predecessors, (148), 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 17:55:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 148 transitions. [2021-12-06 17:55:17,763 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 148 transitions. Word has length 92 [2021-12-06 17:55:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:17,764 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 148 transitions. [2021-12-06 17:55:17,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 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 17:55:17,764 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 148 transitions. [2021-12-06 17:55:17,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 17:55:17,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:17,764 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:17,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 17:55:17,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:17,966 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:17,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2126956278, now seen corresponding path program 28 times [2021-12-06 17:55:17,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:17,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002071209] [2021-12-06 17:55:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:17,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:18,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:18,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002071209] [2021-12-06 17:55:18,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002071209] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:18,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993605477] [2021-12-06 17:55:18,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:55:18,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:18,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:18,311 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:18,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 17:55:18,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:55:18,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:18,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 17:55:18,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:18,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:55:18,732 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 19 treesize of output 7 [2021-12-06 17:55:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:18,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:18,845 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 16 treesize of output 14 [2021-12-06 17:55:18,846 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 32 treesize of output 28 [2021-12-06 17:55:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:18,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993605477] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:18,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:18,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 38 [2021-12-06 17:55:18,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964513262] [2021-12-06 17:55:18,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:18,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 17:55:18,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:18,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 17:55:18,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 17:55:18,937 INFO L87 Difference]: Start difference. First operand 143 states and 148 transitions. Second operand has 38 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 38 states have internal predecessors, (139), 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 17:55:19,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:19,959 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2021-12-06 17:55:19,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 17:55:19,959 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 38 states have internal predecessors, (139), 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 92 [2021-12-06 17:55:19,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:19,960 INFO L225 Difference]: With dead ends: 212 [2021-12-06 17:55:19,960 INFO L226 Difference]: Without dead ends: 210 [2021-12-06 17:55:19,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 166 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=319, Invalid=5083, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 17:55:19,961 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 110 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 2232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:19,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 767 Invalid, 2232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:55:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-06 17:55:19,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 151. [2021-12-06 17:55:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.04) internal successors, (156), 150 states have internal predecessors, (156), 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 17:55:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2021-12-06 17:55:19,987 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 92 [2021-12-06 17:55:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:19,987 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2021-12-06 17:55:19,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 38 states have internal predecessors, (139), 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 17:55:19,987 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2021-12-06 17:55:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 17:55:19,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:19,988 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:20,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 17:55:20,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:20,188 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:20,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:20,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1402148805, now seen corresponding path program 29 times [2021-12-06 17:55:20,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:20,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875416483] [2021-12-06 17:55:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:20,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 24 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:20,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:20,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875416483] [2021-12-06 17:55:20,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875416483] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:20,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628504929] [2021-12-06 17:55:20,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:55:20,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:20,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:20,651 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:20,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 17:55:21,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 17:55:21,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:21,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 17:55:21,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:21,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:55:21,397 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:55:21,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:55:21,406 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:55:21,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:55:21,438 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:55:21,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:55:21,448 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:55:21,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:55:21,485 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:55:21,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:55:21,497 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:55:21,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:55:21,538 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:55:21,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:55:21,546 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:55:21,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:55:21,581 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:55:21,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:55:21,874 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 19 treesize of output 7 [2021-12-06 17:55:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 36 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:21,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:24,232 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_771| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_771| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1808 Int)) (<= 8 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_771| 4)) v_ArrVal_1808) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 32)))))) is different from false [2021-12-06 17:55:28,857 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 20 treesize of output 18 [2021-12-06 17:55:28,859 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 36 treesize of output 32 [2021-12-06 17:55:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 24 trivial. 13 not checked. [2021-12-06 17:55:28,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628504929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:28,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:28,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 26] total 65 [2021-12-06 17:55:28,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995069174] [2021-12-06 17:55:28,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:28,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 17:55:28,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:28,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 17:55:28,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=3771, Unknown=1, NotChecked=124, Total=4160 [2021-12-06 17:55:28,915 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand has 65 states, 65 states have (on average 3.5538461538461537) internal successors, (231), 65 states have internal predecessors, (231), 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 17:55:31,496 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8) (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 32))) (<= (+ |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_main_~i~0#1|) (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_771| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_771| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1808 Int)) (<= 8 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_771| 4)) v_ArrVal_1808) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 32)))))) (<= 9 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2021-12-06 17:55:33,550 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8) (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 32))) (<= 10 |c_ULTIMATE.start_main_~i~0#1|) (<= (+ |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_main_~i~0#1|) (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_771| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_771| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1808 Int)) (<= 8 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_771| 4)) v_ArrVal_1808) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 32)))))))) is different from false [2021-12-06 17:55:35,624 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8) (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 32))) (<= (+ |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_main_~i~0#1|) (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_771| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_771| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1808 Int)) (<= 8 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_771| 4)) v_ArrVal_1808) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 32)))))) (<= 11 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2021-12-06 17:55:37,765 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8) (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 32))) (<= 12 |c_ULTIMATE.start_main_~i~0#1|) (<= (+ |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_main_~i~0#1|) (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_771| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_771| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1808 Int)) (<= 8 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_771| 4)) v_ArrVal_1808) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 32)))))))) is different from false [2021-12-06 17:55:39,932 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 32)))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8) .cse0) (<= 12 |c_ULTIMATE.start_main_~i~0#1|) (<= 13 |c_ULTIMATE.start_main_~i~0#1|) (<= 8 .cse0) (<= (+ |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_main_~i~0#1|) (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_771| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_771| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1808 Int)) (<= 8 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_771| 4)) v_ArrVal_1808) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 32))))))))) is different from false [2021-12-06 17:55:40,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:40,729 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2021-12-06 17:55:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 17:55:40,729 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.5538461538461537) internal successors, (231), 65 states have internal predecessors, (231), 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 96 [2021-12-06 17:55:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:40,730 INFO L225 Difference]: With dead ends: 217 [2021-12-06 17:55:40,730 INFO L226 Difference]: Without dead ends: 215 [2021-12-06 17:55:40,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 153 SyntacticMatches, 11 SemanticMatches, 100 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 2655 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=636, Invalid=8502, Unknown=6, NotChecked=1158, Total=10302 [2021-12-06 17:55:40,731 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 134 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 3429 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 3664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:40,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 1203 Invalid, 3664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3429 Invalid, 0 Unknown, 106 Unchecked, 1.0s Time] [2021-12-06 17:55:40,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-06 17:55:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 109. [2021-12-06 17:55:40,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 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 17:55:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2021-12-06 17:55:40,749 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 96 [2021-12-06 17:55:40,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:40,749 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2021-12-06 17:55:40,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.5538461538461537) internal successors, (231), 65 states have internal predecessors, (231), 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 17:55:40,750 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2021-12-06 17:55:40,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 17:55:40,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:40,750 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:40,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-06 17:55:40,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:40,951 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:40,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:40,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1469941268, now seen corresponding path program 30 times [2021-12-06 17:55:40,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:40,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328445577] [2021-12-06 17:55:40,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:40,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 201 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:41,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:41,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328445577] [2021-12-06 17:55:41,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328445577] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:41,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887265385] [2021-12-06 17:55:41,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:55:41,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:41,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:41,121 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:41,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 17:55:41,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-06 17:55:41,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:41,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 17:55:41,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:41,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:55:42,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 17:55:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 242 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:42,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:43,052 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 18 treesize of output 16 [2021-12-06 17:55:43,054 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 38 treesize of output 32 [2021-12-06 17:55:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 220 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:43,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887265385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:43,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:43,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 28] total 57 [2021-12-06 17:55:43,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167274689] [2021-12-06 17:55:43,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:43,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 17:55:43,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:43,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 17:55:43,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=2499, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 17:55:43,154 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 57 states, 57 states have (on average 3.6315789473684212) internal successors, (207), 57 states have internal predecessors, (207), 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 17:55:43,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:43,633 INFO L93 Difference]: Finished difference Result 210 states and 214 transitions. [2021-12-06 17:55:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 17:55:43,633 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.6315789473684212) internal successors, (207), 57 states have internal predecessors, (207), 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 96 [2021-12-06 17:55:43,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:43,634 INFO L225 Difference]: With dead ends: 210 [2021-12-06 17:55:43,634 INFO L226 Difference]: Without dead ends: 103 [2021-12-06 17:55:43,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1124, Invalid=5038, Unknown=0, NotChecked=0, Total=6162 [2021-12-06 17:55:43,635 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 66 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:43,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 393 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 117 Invalid, 0 Unknown, 112 Unchecked, 0.0s Time] [2021-12-06 17:55:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-06 17:55:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-12-06 17:55:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 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 17:55:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-12-06 17:55:43,650 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 96 [2021-12-06 17:55:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:43,651 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-12-06 17:55:43,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.6315789473684212) internal successors, (207), 57 states have internal predecessors, (207), 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 17:55:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-12-06 17:55:43,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 17:55:43,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:43,651 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:43,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 17:55:43,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:43,852 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:43,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:43,854 INFO L85 PathProgramCache]: Analyzing trace with hash -905180180, now seen corresponding path program 31 times [2021-12-06 17:55:43,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:43,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394857981] [2021-12-06 17:55:43,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:43,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:44,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:44,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394857981] [2021-12-06 17:55:44,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394857981] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:44,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281058063] [2021-12-06 17:55:44,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:55:44,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:44,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:44,242 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:44,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 17:55:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:44,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 17:55:44,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:44,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:55:44,483 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:55:44,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:55:44,494 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:55:44,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:55:44,525 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:55:44,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:55:44,798 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 19 treesize of output 7 [2021-12-06 17:55:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 3 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:44,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:45,036 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 20 treesize of output 18 [2021-12-06 17:55:45,037 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 36 treesize of output 32 [2021-12-06 17:55:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 524 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:55:45,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281058063] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:45,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:45,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 43 [2021-12-06 17:55:45,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319356180] [2021-12-06 17:55:45,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:45,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 17:55:45,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:45,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 17:55:45,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1664, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 17:55:45,125 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 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 17:55:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:46,013 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2021-12-06 17:55:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 17:55:46,013 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 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 100 [2021-12-06 17:55:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:46,014 INFO L225 Difference]: With dead ends: 117 [2021-12-06 17:55:46,014 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 17:55:46,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 177 SyntacticMatches, 11 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=4509, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 17:55:46,015 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 104 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:46,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 799 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2321 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:55:46,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 17:55:46,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2021-12-06 17:55:46,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 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 17:55:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-12-06 17:55:46,031 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2021-12-06 17:55:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:46,031 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-12-06 17:55:46,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 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 17:55:46,032 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-12-06 17:55:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 17:55:46,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:46,032 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:46,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-06 17:55:46,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 17:55:46,233 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:46,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:46,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1796189214, now seen corresponding path program 32 times [2021-12-06 17:55:46,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:46,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864408212] [2021-12-06 17:55:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:46,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:46,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:46,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864408212] [2021-12-06 17:55:46,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864408212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:46,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637137769] [2021-12-06 17:55:46,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:55:46,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:46,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:46,661 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:46,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 17:55:46,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:55:46,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:46,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 17:55:46,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:46,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:55:46,916 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:55:46,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:55:47,237 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 19 treesize of output 7 [2021-12-06 17:55:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:47,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:47,413 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 20 treesize of output 18 [2021-12-06 17:55:47,415 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 36 treesize of output 32 [2021-12-06 17:55:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:47,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637137769] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:47,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:47,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 30] total 44 [2021-12-06 17:55:47,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343218144] [2021-12-06 17:55:47,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:47,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 17:55:47,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:47,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 17:55:47,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 17:55:47,527 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 44 states, 44 states have (on average 3.6136363636363638) internal successors, (159), 44 states have internal predecessors, (159), 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 17:55:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:48,628 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2021-12-06 17:55:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 17:55:48,628 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.6136363636363638) internal successors, (159), 44 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-06 17:55:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:48,628 INFO L225 Difference]: With dead ends: 116 [2021-12-06 17:55:48,629 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 17:55:48,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 186 SyntacticMatches, 9 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=312, Invalid=4658, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 17:55:48,629 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 101 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 2646 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 2766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:48,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 812 Invalid, 2766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2646 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:55:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 17:55:48,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2021-12-06 17:55:48,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 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 17:55:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-12-06 17:55:48,649 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2021-12-06 17:55:48,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:48,649 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-12-06 17:55:48,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.6136363636363638) internal successors, (159), 44 states have internal predecessors, (159), 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 17:55:48,649 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-12-06 17:55:48,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-06 17:55:48,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:48,650 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:48,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-06 17:55:48,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 17:55:48,851 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:48,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:48,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1138995416, now seen corresponding path program 33 times [2021-12-06 17:55:48,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:48,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395795347] [2021-12-06 17:55:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:48,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:49,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:49,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395795347] [2021-12-06 17:55:49,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395795347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:49,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447790832] [2021-12-06 17:55:49,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:55:49,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:49,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:49,377 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:49,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 17:55:50,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-06 17:55:50,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:50,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 17:55:50,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:50,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:55:51,352 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 17:55:51,353 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 23 treesize of output 10 [2021-12-06 17:55:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 276 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:51,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:52,270 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 18 treesize of output 16 [2021-12-06 17:55:52,272 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 38 treesize of output 32 [2021-12-06 17:55:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 264 proven. 349 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:52,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447790832] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:55:52,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:55:52,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 74 [2021-12-06 17:55:52,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020588957] [2021-12-06 17:55:52,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:55:52,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-06 17:55:52,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:52,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-06 17:55:52,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=4693, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 17:55:52,374 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 74 states, 74 states have (on average 3.608108108108108) internal successors, (267), 74 states have internal predecessors, (267), 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 17:55:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:53,920 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2021-12-06 17:55:53,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-06 17:55:53,920 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.608108108108108) internal successors, (267), 74 states have internal predecessors, (267), 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 108 [2021-12-06 17:55:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:53,921 INFO L225 Difference]: With dead ends: 230 [2021-12-06 17:55:53,921 INFO L226 Difference]: Without dead ends: 171 [2021-12-06 17:55:53,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4147 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1837, Invalid=14165, Unknown=0, NotChecked=0, Total=16002 [2021-12-06 17:55:53,922 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 262 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:55:53,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 629 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 932 Invalid, 0 Unknown, 230 Unchecked, 0.3s Time] [2021-12-06 17:55:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-06 17:55:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 125. [2021-12-06 17:55:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2021-12-06 17:55:53,943 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 108 [2021-12-06 17:55:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:53,943 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2021-12-06 17:55:53,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.608108108108108) internal successors, (267), 74 states have internal predecessors, (267), 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 17:55:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2021-12-06 17:55:53,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 17:55:53,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:53,944 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:53,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 17:55:54,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 17:55:54,144 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:54,145 INFO L85 PathProgramCache]: Analyzing trace with hash 123488718, now seen corresponding path program 34 times [2021-12-06 17:55:54,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:54,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051760267] [2021-12-06 17:55:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:54,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 0 proven. 723 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:54,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:54,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051760267] [2021-12-06 17:55:54,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051760267] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:55:54,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195809390] [2021-12-06 17:55:54,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:55:54,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:55:54,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:55:54,698 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:55:54,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 17:55:54,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:55:54,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:55:54,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 17:55:54,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:55:55,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:55:55,094 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:55:55,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:55:55,105 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:55:55,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:55:55,151 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:55:55,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:55:55,557 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 19 treesize of output 7 [2021-12-06 17:55:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 3 proven. 720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:55,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:58,037 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1019| Int)) (or (forall ((v_ArrVal_2351 Int)) (<= 12 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1019| 4)) v_ArrVal_2351) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 48)))) (< |v_ULTIMATE.start_main_~i~0#1_1019| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 17:55:58,620 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2351 Int) (|v_ULTIMATE.start_main_~i~0#1_1019| Int) (v_ArrVal_2349 Int)) (or (<= 12 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_2349) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1019| 4)) v_ArrVal_2351) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 48))) (< |v_ULTIMATE.start_main_~i~0#1_1019| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 17:58:08,143 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 38 treesize of output 36 [2021-12-06 17:58:08,146 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 802 treesize of output 794 [2021-12-06 17:58:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 0 proven. 664 refuted. 31 times theorem prover too weak. 0 trivial. 28 not checked. [2021-12-06 17:58:09,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195809390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:09,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:58:09,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 35] total 81 [2021-12-06 17:58:09,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284361656] [2021-12-06 17:58:09,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:09,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-06 17:58:09,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:09,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-06 17:58:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=5729, Unknown=86, NotChecked=310, Total=6480 [2021-12-06 17:58:09,018 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 81 states, 81 states have (on average 3.5555555555555554) internal successors, (288), 81 states have internal predecessors, (288), 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 17:58:11,801 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (<= (+ (div (+ (* |c_ULTIMATE.start_main_~a~0#1.offset| (- 1)) 48) 4) 1) |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_1019| Int)) (or (forall ((v_ArrVal_2351 Int)) (<= 12 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1019| 4)) v_ArrVal_2351) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 48)))) (< |v_ULTIMATE.start_main_~i~0#1_1019| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= 12 (select .cse0 48)) (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))))) is different from false [2021-12-06 17:58:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:12,593 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2021-12-06 17:58:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 17:58:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.5555555555555554) internal successors, (288), 81 states have internal predecessors, (288), 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 116 [2021-12-06 17:58:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:12,594 INFO L225 Difference]: With dead ends: 180 [2021-12-06 17:58:12,594 INFO L226 Difference]: Without dead ends: 178 [2021-12-06 17:58:12,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 195 SyntacticMatches, 5 SemanticMatches, 110 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3700 ImplicationChecksByTransitivity, 136.0s TimeCoverageRelationStatistics Valid=647, Invalid=11050, Unknown=87, NotChecked=648, Total=12432 [2021-12-06 17:58:12,595 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 151 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 3253 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 3686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 3253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:12,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1193 Invalid, 3686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 3253 Invalid, 0 Unknown, 327 Unchecked, 0.9s Time] [2021-12-06 17:58:12,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-06 17:58:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 117. [2021-12-06 17:58:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 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 17:58:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-12-06 17:58:12,616 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2021-12-06 17:58:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:12,616 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-12-06 17:58:12,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.5555555555555554) internal successors, (288), 81 states have internal predecessors, (288), 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 17:58:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-12-06 17:58:12,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 17:58:12,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:12,617 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:12,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 17:58:12,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 17:58:12,818 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:12,819 INFO L85 PathProgramCache]: Analyzing trace with hash -399645559, now seen corresponding path program 35 times [2021-12-06 17:58:12,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:12,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049863234] [2021-12-06 17:58:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:12,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:13,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:13,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049863234] [2021-12-06 17:58:13,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049863234] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:58:13,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881668524] [2021-12-06 17:58:13,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:58:13,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:13,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:13,291 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:13,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 17:58:13,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 17:58:13,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:58:13,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 17:58:13,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:14,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:58:15,271 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 17:58:15,271 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 23 treesize of output 10 [2021-12-06 17:58:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 325 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:15,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:16,444 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 21 treesize of output 19 [2021-12-06 17:58:16,446 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 45 treesize of output 38 [2021-12-06 17:58:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 144 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:16,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881668524] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:16,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:58:16,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 80 [2021-12-06 17:58:16,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75715612] [2021-12-06 17:58:16,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:16,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 17:58:16,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:16,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 17:58:16,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=656, Invalid=5664, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 17:58:16,574 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 80 states, 80 states have (on average 3.5875) internal successors, (287), 80 states have internal predecessors, (287), 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 17:58:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:18,731 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2021-12-06 17:58:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-06 17:58:18,731 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.5875) internal successors, (287), 80 states have internal predecessors, (287), 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 116 [2021-12-06 17:58:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:18,732 INFO L225 Difference]: With dead ends: 190 [2021-12-06 17:58:18,732 INFO L226 Difference]: Without dead ends: 127 [2021-12-06 17:58:18,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2902 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1565, Invalid=14691, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 17:58:18,733 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 85 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:18,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 786 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1761 Invalid, 0 Unknown, 545 Unchecked, 0.5s Time] [2021-12-06 17:58:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-06 17:58:18,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2021-12-06 17:58:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 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 17:58:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-12-06 17:58:18,753 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2021-12-06 17:58:18,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:18,754 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-12-06 17:58:18,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.5875) internal successors, (287), 80 states have internal predecessors, (287), 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 17:58:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-12-06 17:58:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 17:58:18,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:18,754 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:18,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 17:58:18,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 17:58:18,955 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:18,956 INFO L85 PathProgramCache]: Analyzing trace with hash 306892996, now seen corresponding path program 36 times [2021-12-06 17:58:18,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:18,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186397881] [2021-12-06 17:58:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:18,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 0 proven. 773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:19,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:19,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186397881] [2021-12-06 17:58:19,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186397881] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:58:19,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601738717] [2021-12-06 17:58:19,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:58:19,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:19,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:19,512 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:19,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 17:58:20,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-06 17:58:20,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:58:20,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 17:58:20,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:21,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:58:21,419 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-06 17:58:21,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2021-12-06 17:58:23,951 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-12-06 17:58:23,951 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 34 treesize of output 34 [2021-12-06 17:58:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 325 proven. 448 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:24,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:28,960 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 25 treesize of output 23 [2021-12-06 17:58:28,963 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 96 treesize of output 90 [2021-12-06 17:58:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 312 proven. 461 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:29,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601738717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:29,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:58:29,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36, 36] total 87 [2021-12-06 17:58:29,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967983314] [2021-12-06 17:58:29,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:29,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-06 17:58:29,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:29,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-06 17:58:29,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=852, Invalid=6629, Unknown=1, NotChecked=0, Total=7482 [2021-12-06 17:58:29,035 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 87 states, 87 states have (on average 3.425287356321839) internal successors, (298), 87 states have internal predecessors, (298), 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 17:58:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:32,265 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2021-12-06 17:58:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-06 17:58:32,265 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.425287356321839) internal successors, (298), 87 states have internal predecessors, (298), 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 120 [2021-12-06 17:58:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:32,266 INFO L225 Difference]: With dead ends: 188 [2021-12-06 17:58:32,266 INFO L226 Difference]: Without dead ends: 125 [2021-12-06 17:58:32,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5249 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2272, Invalid=23167, Unknown=1, NotChecked=0, Total=25440 [2021-12-06 17:58:32,267 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 128 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 812 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:32,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 759 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 824 Invalid, 0 Unknown, 812 Unchecked, 0.3s Time] [2021-12-06 17:58:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-06 17:58:32,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-12-06 17:58:32,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 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 17:58:32,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-12-06 17:58:32,292 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 120 [2021-12-06 17:58:32,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:32,292 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-12-06 17:58:32,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.425287356321839) internal successors, (298), 87 states have internal predecessors, (298), 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 17:58:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-12-06 17:58:32,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 17:58:32,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:32,293 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:32,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 17:58:32,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 17:58:32,494 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:32,495 INFO L85 PathProgramCache]: Analyzing trace with hash -816765057, now seen corresponding path program 37 times [2021-12-06 17:58:32,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:32,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066648029] [2021-12-06 17:58:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:32,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 0 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:33,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:33,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066648029] [2021-12-06 17:58:33,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066648029] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:58:33,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272606579] [2021-12-06 17:58:33,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:58:33,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:33,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:33,028 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:33,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 17:58:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:33,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 17:58:33,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:33,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:58:33,327 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:58:33,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:58:33,338 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:58:33,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:58:33,382 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:58:33,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:58:33,882 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 19 treesize of output 7 [2021-12-06 17:58:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 3 proven. 831 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:33,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:34,216 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 20 treesize of output 18 [2021-12-06 17:58:34,218 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 36 treesize of output 32 [2021-12-06 17:58:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 0 proven. 833 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:58:34,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272606579] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:34,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:58:34,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 35] total 52 [2021-12-06 17:58:34,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49951350] [2021-12-06 17:58:34,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:34,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 17:58:34,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:34,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 17:58:34,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2480, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 17:58:34,377 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 52 states, 52 states have (on average 3.673076923076923) internal successors, (191), 52 states have internal predecessors, (191), 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 17:58:35,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:35,856 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2021-12-06 17:58:35,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 17:58:35,856 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.673076923076923) internal successors, (191), 52 states have internal predecessors, (191), 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 124 [2021-12-06 17:58:35,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:35,857 INFO L225 Difference]: With dead ends: 141 [2021-12-06 17:58:35,857 INFO L226 Difference]: Without dead ends: 139 [2021-12-06 17:58:35,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 222 SyntacticMatches, 11 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=387, Invalid=6753, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 17:58:35,858 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 89 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 3670 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 3783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:35,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1235 Invalid, 3783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3670 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:58:35,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-06 17:58:35,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2021-12-06 17:58:35,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:35,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-12-06 17:58:35,880 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2021-12-06 17:58:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:35,880 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-12-06 17:58:35,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.673076923076923) internal successors, (191), 52 states have internal predecessors, (191), 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 17:58:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-12-06 17:58:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-06 17:58:35,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:35,881 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:35,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 17:58:36,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:36,082 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:36,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:36,083 INFO L85 PathProgramCache]: Analyzing trace with hash -196645387, now seen corresponding path program 38 times [2021-12-06 17:58:36,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:36,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153722989] [2021-12-06 17:58:36,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:36,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:36,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:36,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153722989] [2021-12-06 17:58:36,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153722989] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:58:36,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361241205] [2021-12-06 17:58:36,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:58:36,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:36,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:36,596 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:36,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 17:58:36,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:58:36,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:58:36,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 17:58:36,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:36,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:58:36,937 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:58:36,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:58:37,416 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 19 treesize of output 7 [2021-12-06 17:58:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:37,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:37,651 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 20 treesize of output 18 [2021-12-06 17:58:37,652 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 36 treesize of output 32 [2021-12-06 17:58:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:37,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361241205] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:37,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:58:37,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 36] total 54 [2021-12-06 17:58:37,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333628932] [2021-12-06 17:58:37,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:37,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 17:58:37,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:37,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 17:58:37,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2686, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 17:58:37,797 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 54 states, 54 states have (on average 3.6296296296296298) internal successors, (196), 54 states have internal predecessors, (196), 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 17:58:39,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:39,212 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2021-12-06 17:58:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 17:58:39,212 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.6296296296296298) internal successors, (196), 54 states have internal predecessors, (196), 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 128 [2021-12-06 17:58:39,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:39,213 INFO L225 Difference]: With dead ends: 140 [2021-12-06 17:58:39,213 INFO L226 Difference]: Without dead ends: 138 [2021-12-06 17:58:39,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 230 SyntacticMatches, 8 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=385, Invalid=7097, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 17:58:39,214 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 135 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 3644 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 3804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 3644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:39,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1193 Invalid, 3804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 3644 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:58:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-06 17:58:39,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2021-12-06 17:58:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 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 17:58:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-12-06 17:58:39,236 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 128 [2021-12-06 17:58:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:39,237 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-12-06 17:58:39,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.6296296296296298) internal successors, (196), 54 states have internal predecessors, (196), 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 17:58:39,237 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-12-06 17:58:39,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-06 17:58:39,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:39,237 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:39,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 17:58:39,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-06 17:58:39,438 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:39,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1893103253, now seen corresponding path program 39 times [2021-12-06 17:58:39,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:39,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299341593] [2021-12-06 17:58:39,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:39,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:40,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:40,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299341593] [2021-12-06 17:58:40,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299341593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:58:40,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852338907] [2021-12-06 17:58:40,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:58:40,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:40,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:40,036 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:40,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 17:58:42,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-12-06 17:58:42,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:58:42,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 17:58:42,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:42,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:58:43,959 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 17:58:43,959 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 23 treesize of output 10 [2021-12-06 17:58:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 435 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:43,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:45,481 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 18 treesize of output 16 [2021-12-06 17:58:45,483 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 38 treesize of output 32 [2021-12-06 17:58:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 420 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:45,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852338907] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:45,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:58:45,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 90 [2021-12-06 17:58:45,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410533653] [2021-12-06 17:58:45,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:45,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-06 17:58:45,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:45,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-06 17:58:45,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=7141, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 17:58:45,614 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 90 states, 90 states have (on average 3.6333333333333333) internal successors, (327), 90 states have internal predecessors, (327), 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 17:58:48,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:48,972 INFO L93 Difference]: Finished difference Result 287 states and 291 transitions. [2021-12-06 17:58:48,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-06 17:58:48,972 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.6333333333333333) internal successors, (327), 90 states have internal predecessors, (327), 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 132 [2021-12-06 17:58:48,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:48,973 INFO L225 Difference]: With dead ends: 287 [2021-12-06 17:58:48,973 INFO L226 Difference]: Without dead ends: 216 [2021-12-06 17:58:48,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4671 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2185, Invalid=22307, Unknown=0, NotChecked=0, Total=24492 [2021-12-06 17:58:48,974 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 233 mSDsluCounter, 2012 mSDsCounter, 0 mSdLazyCounter, 2986 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 3886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 755 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:48,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 2083 Invalid, 3886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2986 Invalid, 0 Unknown, 755 Unchecked, 0.9s Time] [2021-12-06 17:58:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-06 17:58:49,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 149. [2021-12-06 17:58:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 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 17:58:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2021-12-06 17:58:49,001 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 132 [2021-12-06 17:58:49,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:49,001 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2021-12-06 17:58:49,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.6333333333333333) internal successors, (327), 90 states have internal predecessors, (327), 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 17:58:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2021-12-06 17:58:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 17:58:49,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:49,002 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:49,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-06 17:58:49,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:49,203 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:49,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:49,204 INFO L85 PathProgramCache]: Analyzing trace with hash 516169825, now seen corresponding path program 40 times [2021-12-06 17:58:49,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:49,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532230160] [2021-12-06 17:58:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:49,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:49,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532230160] [2021-12-06 17:58:49,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532230160] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:58:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792792984] [2021-12-06 17:58:49,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:58:49,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:49,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:49,823 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:49,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 17:58:50,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:58:50,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:58:50,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 17:58:50,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:50,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:58:50,204 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:58:50,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:58:50,215 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:58:50,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:58:50,262 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:58:50,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:58:50,782 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 19 treesize of output 7 [2021-12-06 17:58:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 3 proven. 1077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:50,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:51,091 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 20 treesize of output 18 [2021-12-06 17:58:51,092 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 36 treesize of output 32 [2021-12-06 17:58:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1079 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:58:51,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792792984] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:51,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:58:51,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 39] total 58 [2021-12-06 17:58:51,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900057568] [2021-12-06 17:58:51,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:51,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 17:58:51,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 17:58:51,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3114, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 17:58:51,221 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 58 states, 58 states have (on average 3.706896551724138) internal successors, (215), 58 states have internal predecessors, (215), 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 17:58:52,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:52,958 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2021-12-06 17:58:52,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-06 17:58:52,958 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.706896551724138) internal successors, (215), 58 states have internal predecessors, (215), 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 140 [2021-12-06 17:58:52,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:52,959 INFO L225 Difference]: With dead ends: 223 [2021-12-06 17:58:52,959 INFO L226 Difference]: Without dead ends: 221 [2021-12-06 17:58:52,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 252 SyntacticMatches, 11 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=431, Invalid=8499, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 17:58:52,960 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 133 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 4343 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 4499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 4343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:52,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 1415 Invalid, 4499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 4343 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 17:58:52,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-06 17:58:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 141. [2021-12-06 17:58:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 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 17:58:52,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-12-06 17:58:52,988 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 140 [2021-12-06 17:58:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:52,989 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-12-06 17:58:52,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.706896551724138) internal successors, (215), 58 states have internal predecessors, (215), 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 17:58:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-12-06 17:58:52,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 17:58:52,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:52,989 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:53,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-06 17:58:53,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-06 17:58:53,191 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:53,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:53,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1505000092, now seen corresponding path program 41 times [2021-12-06 17:58:53,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:53,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20086573] [2021-12-06 17:58:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:53,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:53,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:53,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20086573] [2021-12-06 17:58:53,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20086573] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:58:53,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677368355] [2021-12-06 17:58:53,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:58:53,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:53,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:53,872 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:53,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 17:58:55,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-06 17:58:55,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:58:55,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 17:58:55,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:55,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:58:55,890 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 19 treesize of output 7 [2021-12-06 17:58:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:55,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:56,044 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 16 treesize of output 14 [2021-12-06 17:58:56,046 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 32 treesize of output 28 [2021-12-06 17:58:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:56,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677368355] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:56,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:58:56,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 57 [2021-12-06 17:58:56,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701062673] [2021-12-06 17:58:56,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:56,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 17:58:56,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:56,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 17:58:56,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3025, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 17:58:56,203 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 57 states, 57 states have (on average 3.7017543859649122) internal successors, (211), 57 states have internal predecessors, (211), 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 17:58:58,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:58,203 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2021-12-06 17:58:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-06 17:58:58,204 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.7017543859649122) internal successors, (211), 57 states have internal predecessors, (211), 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 140 [2021-12-06 17:58:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:58,205 INFO L225 Difference]: With dead ends: 240 [2021-12-06 17:58:58,205 INFO L226 Difference]: Without dead ends: 238 [2021-12-06 17:58:58,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 256 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=482, Invalid=11728, Unknown=0, NotChecked=0, Total=12210 [2021-12-06 17:58:58,206 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 157 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 4521 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 4712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 4521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:58,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1533 Invalid, 4712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 4521 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 17:58:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-06 17:58:58,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 157. [2021-12-06 17:58:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 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 17:58:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2021-12-06 17:58:58,237 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 140 [2021-12-06 17:58:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:58,237 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2021-12-06 17:58:58,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.7017543859649122) internal successors, (211), 57 states have internal predecessors, (211), 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 17:58:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2021-12-06 17:58:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-06 17:58:58,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:58,238 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:58:58,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-06 17:58:58,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-06 17:58:58,440 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash 677505682, now seen corresponding path program 42 times [2021-12-06 17:58:58,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:58,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395948229] [2021-12-06 17:58:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:58,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 513 proven. 626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:58,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:58,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395948229] [2021-12-06 17:58:58,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395948229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:58:58,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647309789] [2021-12-06 17:58:58,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:58:58,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:58,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:58,762 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:58,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 17:59:01,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-06 17:59:01,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:59:01,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 17:59:01,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 578 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:02,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 578 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:02,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647309789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:02,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:59:02,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2021-12-06 17:59:02,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5094524] [2021-12-06 17:59:02,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:02,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 17:59:02,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:02,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 17:59:02,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 17:59:02,470 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 58 states, 58 states have (on average 3.8620689655172415) internal successors, (224), 58 states have internal predecessors, (224), 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 17:59:02,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:02,819 INFO L93 Difference]: Finished difference Result 306 states and 309 transitions. [2021-12-06 17:59:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 17:59:02,820 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.8620689655172415) internal successors, (224), 58 states have internal predecessors, (224), 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 144 [2021-12-06 17:59:02,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:02,821 INFO L225 Difference]: With dead ends: 306 [2021-12-06 17:59:02,821 INFO L226 Difference]: Without dead ends: 227 [2021-12-06 17:59:02,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1314, Invalid=4386, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 17:59:02,821 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 365 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:02,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 294 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:59:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-06 17:59:02,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 157. [2021-12-06 17:59:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 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 17:59:02,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2021-12-06 17:59:02,853 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 144 [2021-12-06 17:59:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:02,853 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2021-12-06 17:59:02,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.8620689655172415) internal successors, (224), 58 states have internal predecessors, (224), 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 17:59:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2021-12-06 17:59:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-06 17:59:02,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:02,854 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:02,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-06 17:59:03,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:03,055 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:03,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:03,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1109113746, now seen corresponding path program 43 times [2021-12-06 17:59:03,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:03,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211031550] [2021-12-06 17:59:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:03,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 0 proven. 1215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:03,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:03,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211031550] [2021-12-06 17:59:03,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211031550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:59:03,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825561039] [2021-12-06 17:59:03,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:59:03,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:03,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:03,782 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:03,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 17:59:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:03,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-06 17:59:03,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:04,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:59:04,081 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:59:04,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:59:04,091 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:59:04,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:59:04,134 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:59:04,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:59:04,766 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 19 treesize of output 7 [2021-12-06 17:59:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 3 proven. 1212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:04,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:05,103 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 20 treesize of output 18 [2021-12-06 17:59:05,105 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 36 treesize of output 32 [2021-12-06 17:59:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 0 proven. 1214 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:59:05,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825561039] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:05,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:59:05,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 41] total 61 [2021-12-06 17:59:05,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648712573] [2021-12-06 17:59:05,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:05,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 17:59:05,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 17:59:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3458, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 17:59:05,291 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 61 states, 61 states have (on average 3.721311475409836) internal successors, (227), 61 states have internal predecessors, (227), 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 17:59:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:07,400 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2021-12-06 17:59:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-06 17:59:07,400 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.721311475409836) internal successors, (227), 61 states have internal predecessors, (227), 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 148 [2021-12-06 17:59:07,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:07,401 INFO L225 Difference]: With dead ends: 235 [2021-12-06 17:59:07,401 INFO L226 Difference]: Without dead ends: 233 [2021-12-06 17:59:07,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 267 SyntacticMatches, 11 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=453, Invalid=9447, Unknown=0, NotChecked=0, Total=9900 [2021-12-06 17:59:07,402 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 108 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 4966 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 5100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 4966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:07,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1611 Invalid, 5100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 4966 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 17:59:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-06 17:59:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 149. [2021-12-06 17:59:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 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 17:59:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-12-06 17:59:07,434 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 148 [2021-12-06 17:59:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:07,434 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-12-06 17:59:07,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.721311475409836) internal successors, (227), 61 states have internal predecessors, (227), 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 17:59:07,434 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-12-06 17:59:07,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-06 17:59:07,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:07,435 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:07,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-06 17:59:07,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 17:59:07,636 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:07,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:07,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2089713741, now seen corresponding path program 44 times [2021-12-06 17:59:07,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:07,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933920573] [2021-12-06 17:59:07,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:07,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:08,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:08,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933920573] [2021-12-06 17:59:08,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933920573] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:59:08,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212079453] [2021-12-06 17:59:08,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:59:08,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:08,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:08,239 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:08,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 17:59:08,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:59:08,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:59:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 17:59:08,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:08,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:59:09,189 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 19 treesize of output 7 [2021-12-06 17:59:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:09,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:09,394 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 16 treesize of output 14 [2021-12-06 17:59:09,396 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 32 treesize of output 28 [2021-12-06 17:59:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:09,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212079453] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:09,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:59:09,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 59 [2021-12-06 17:59:09,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084699782] [2021-12-06 17:59:09,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:09,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 17:59:09,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:09,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 17:59:09,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 17:59:09,576 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 59 states, 59 states have (on average 3.7796610169491527) internal successors, (223), 59 states have internal predecessors, (223), 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 17:59:12,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:12,027 INFO L93 Difference]: Finished difference Result 252 states and 255 transitions. [2021-12-06 17:59:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-06 17:59:12,027 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.7796610169491527) internal successors, (223), 59 states have internal predecessors, (223), 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 148 [2021-12-06 17:59:12,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:12,028 INFO L225 Difference]: With dead ends: 252 [2021-12-06 17:59:12,028 INFO L226 Difference]: Without dead ends: 250 [2021-12-06 17:59:12,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 271 SyntacticMatches, 7 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=501, Invalid=12839, Unknown=0, NotChecked=0, Total=13340 [2021-12-06 17:59:12,029 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 166 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 4800 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 5001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 4800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:12,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 1586 Invalid, 5001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 4800 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 17:59:12,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-06 17:59:12,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 165. [2021-12-06 17:59:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 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 17:59:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2021-12-06 17:59:12,066 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 148 [2021-12-06 17:59:12,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:12,066 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2021-12-06 17:59:12,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.7796610169491527) internal successors, (223), 59 states have internal predecessors, (223), 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 17:59:12,067 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2021-12-06 17:59:12,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-06 17:59:12,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:12,067 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:12,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 17:59:12,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-06 17:59:12,269 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:12,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:12,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1636847677, now seen corresponding path program 45 times [2021-12-06 17:59:12,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:12,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41911957] [2021-12-06 17:59:12,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:12,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 579 proven. 699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:12,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:12,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41911957] [2021-12-06 17:59:12,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41911957] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:59:12,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418973013] [2021-12-06 17:59:12,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:59:12,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:12,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:12,650 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:12,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 17:59:15,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-06 17:59:15,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:59:15,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 17:59:15,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:15,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:59:16,311 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 17:59:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 648 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:16,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:17,404 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 18 treesize of output 16 [2021-12-06 17:59:17,406 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 38 treesize of output 32 [2021-12-06 17:59:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 612 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:17,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418973013] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:17,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:59:17,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 42] total 85 [2021-12-06 17:59:17,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064436226] [2021-12-06 17:59:17,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:17,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-06 17:59:17,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:17,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-06 17:59:17,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1547, Invalid=5593, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 17:59:17,539 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 85 states, 85 states have (on average 3.7529411764705882) internal successors, (319), 85 states have internal predecessors, (319), 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 17:59:18,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:18,415 INFO L93 Difference]: Finished difference Result 322 states and 326 transitions. [2021-12-06 17:59:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-06 17:59:18,415 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.7529411764705882) internal successors, (319), 85 states have internal predecessors, (319), 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 152 [2021-12-06 17:59:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:18,416 INFO L225 Difference]: With dead ends: 322 [2021-12-06 17:59:18,416 INFO L226 Difference]: Without dead ends: 159 [2021-12-06 17:59:18,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4218 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2292, Invalid=10364, Unknown=0, NotChecked=0, Total=12656 [2021-12-06 17:59:18,417 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 79 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:18,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 700 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 148 Invalid, 0 Unknown, 171 Unchecked, 0.1s Time] [2021-12-06 17:59:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-06 17:59:18,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2021-12-06 17:59:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 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 17:59:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-12-06 17:59:18,455 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 152 [2021-12-06 17:59:18,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:18,455 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-12-06 17:59:18,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.7529411764705882) internal successors, (319), 85 states have internal predecessors, (319), 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 17:59:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-12-06 17:59:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-06 17:59:18,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:18,456 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:18,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 17:59:18,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-06 17:59:18,657 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:18,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:18,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1552389309, now seen corresponding path program 46 times [2021-12-06 17:59:18,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:18,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832364478] [2021-12-06 17:59:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:18,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 1358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:19,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:19,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832364478] [2021-12-06 17:59:19,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832364478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:59:19,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226724584] [2021-12-06 17:59:19,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:59:19,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:19,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:19,341 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:19,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 17:59:19,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:59:19,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:59:19,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 17:59:19,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:19,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:59:19,674 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 17:59:19,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:59:19,682 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:59:19,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:59:19,721 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:59:19,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:59:20,359 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 19 treesize of output 7 [2021-12-06 17:59:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 3 proven. 1355 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:20,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:20,678 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 20 treesize of output 18 [2021-12-06 17:59:20,679 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 36 treesize of output 32 [2021-12-06 17:59:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 1357 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:59:20,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226724584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:20,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:59:20,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 43] total 64 [2021-12-06 17:59:20,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374965792] [2021-12-06 17:59:20,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:20,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-06 17:59:20,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:20,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-06 17:59:20,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=3820, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 17:59:20,846 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 64 states, 64 states have (on average 3.734375) internal successors, (239), 64 states have internal predecessors, (239), 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 17:59:22,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:22,902 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2021-12-06 17:59:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 17:59:22,903 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.734375) internal successors, (239), 64 states have internal predecessors, (239), 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 156 [2021-12-06 17:59:22,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:22,903 INFO L225 Difference]: With dead ends: 173 [2021-12-06 17:59:22,904 INFO L226 Difference]: Without dead ends: 171 [2021-12-06 17:59:22,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 282 SyntacticMatches, 11 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=475, Invalid=10445, Unknown=0, NotChecked=0, Total=10920 [2021-12-06 17:59:22,904 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 157 mSDsluCounter, 1760 mSDsCounter, 0 mSdLazyCounter, 5164 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 5346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 5164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:22,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1807 Invalid, 5346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 5164 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 17:59:22,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-06 17:59:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 161. [2021-12-06 17:59:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 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 17:59:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2021-12-06 17:59:22,943 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 156 [2021-12-06 17:59:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:22,943 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2021-12-06 17:59:22,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.734375) internal successors, (239), 64 states have internal predecessors, (239), 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 17:59:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2021-12-06 17:59:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-06 17:59:22,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:22,944 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:22,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-06 17:59:23,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 17:59:23,145 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:23,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:23,146 INFO L85 PathProgramCache]: Analyzing trace with hash 400502713, now seen corresponding path program 47 times [2021-12-06 17:59:23,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:23,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812972777] [2021-12-06 17:59:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:23,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:23,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:23,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812972777] [2021-12-06 17:59:23,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812972777] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:59:23,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325867207] [2021-12-06 17:59:23,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:59:23,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:23,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:23,852 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:23,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 17:59:25,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-12-06 17:59:25,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:59:25,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-06 17:59:25,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:25,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 17:59:25,758 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:59:25,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:59:26,494 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 19 treesize of output 7 [2021-12-06 17:59:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:26,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:26,754 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 20 treesize of output 18 [2021-12-06 17:59:26,755 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 36 treesize of output 32 [2021-12-06 17:59:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:26,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325867207] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:26,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:59:26,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 44] total 65 [2021-12-06 17:59:26,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353077375] [2021-12-06 17:59:26,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:26,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 17:59:26,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:26,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 17:59:26,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3951, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 17:59:26,916 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 65 states, 65 states have (on average 3.7384615384615385) internal successors, (243), 65 states have internal predecessors, (243), 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 17:59:29,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:29,258 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2021-12-06 17:59:29,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-12-06 17:59:29,259 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.7384615384615385) internal successors, (243), 65 states have internal predecessors, (243), 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 160 [2021-12-06 17:59:29,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:29,259 INFO L225 Difference]: With dead ends: 172 [2021-12-06 17:59:29,259 INFO L226 Difference]: Without dead ends: 170 [2021-12-06 17:59:29,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 291 SyntacticMatches, 9 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=466, Invalid=10664, Unknown=0, NotChecked=0, Total=11130 [2021-12-06 17:59:29,260 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 117 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 6089 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 6236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 6089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:29,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 1994 Invalid, 6236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 6089 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 17:59:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-06 17:59:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-12-06 17:59:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 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 17:59:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-12-06 17:59:29,296 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 160 [2021-12-06 17:59:29,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:29,296 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-12-06 17:59:29,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.7384615384615385) internal successors, (243), 65 states have internal predecessors, (243), 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 17:59:29,296 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-12-06 17:59:29,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-06 17:59:29,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:29,297 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:59:29,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-06 17:59:29,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-06 17:59:29,498 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:29,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1178416849, now seen corresponding path program 48 times [2021-12-06 17:59:29,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:29,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718160288] [2021-12-06 17:59:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:29,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:30,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:30,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718160288] [2021-12-06 17:59:30,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718160288] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:59:30,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263779493] [2021-12-06 17:59:30,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:59:30,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:30,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:30,427 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:30,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 17:59:38,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-06 17:59:38,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:59:38,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 17:59:38,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:38,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 17:59:38,847 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-06 17:59:38,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-06 17:59:39,078 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-12-06 17:59:39,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 34 [2021-12-06 17:59:41,630 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-12-06 17:59:41,630 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 37 treesize of output 15 [2021-12-06 17:59:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 703 proven. 799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:41,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:53,456 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 34 treesize of output 32 [2021-12-06 17:59:53,459 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 982 treesize of output 958 [2021-12-06 17:59:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 684 proven. 818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:59:53,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263779493] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:53,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:59:53,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 48, 48] total 118 [2021-12-06 17:59:53,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512864561] [2021-12-06 17:59:53,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:53,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2021-12-06 17:59:53,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:53,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-12-06 17:59:53,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1556, Invalid=12244, Unknown=6, NotChecked=0, Total=13806 [2021-12-06 17:59:53,789 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 118 states, 118 states have (on average 3.5254237288135593) internal successors, (416), 118 states have internal predecessors, (416), 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 18:00:30,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:30,981 INFO L93 Difference]: Finished difference Result 344 states and 348 transitions. [2021-12-06 18:00:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-12-06 18:00:30,982 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.5254237288135593) internal successors, (416), 118 states have internal predecessors, (416), 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 164 [2021-12-06 18:00:30,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:30,982 INFO L225 Difference]: With dead ends: 344 [2021-12-06 18:00:30,982 INFO L226 Difference]: Without dead ends: 173 [2021-12-06 18:00:30,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10937 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=4101, Invalid=46725, Unknown=24, NotChecked=0, Total=50850 [2021-12-06 18:00:30,985 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 77 mSDsluCounter, 1620 mSDsCounter, 0 mSdLazyCounter, 2560 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 493 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:30,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1663 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2560 Invalid, 0 Unknown, 493 Unchecked, 0.8s Time] [2021-12-06 18:00:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-06 18:00:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-12-06 18:00:31,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 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 18:00:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-12-06 18:00:31,027 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 164 [2021-12-06 18:00:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:31,027 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-12-06 18:00:31,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.5254237288135593) internal successors, (416), 118 states have internal predecessors, (416), 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 18:00:31,028 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-12-06 18:00:31,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-06 18:00:31,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:31,028 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:31,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-06 18:00:31,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:31,229 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:31,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1227618267, now seen corresponding path program 49 times [2021-12-06 18:00:31,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:31,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70577731] [2021-12-06 18:00:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:31,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1668 backedges. 0 proven. 1668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:32,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:32,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70577731] [2021-12-06 18:00:32,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70577731] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:00:32,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551388730] [2021-12-06 18:00:32,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:00:32,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:32,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:32,121 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:00:32,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 18:00:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:32,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-06 18:00:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:00:32,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 18:00:32,471 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:00:32,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:00:32,480 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:00:32,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:00:32,530 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:00:32,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:00:33,292 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 19 treesize of output 7 [2021-12-06 18:00:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1668 backedges. 3 proven. 1665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:33,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:00:33,668 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 20 treesize of output 18 [2021-12-06 18:00:33,669 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 36 treesize of output 32 [2021-12-06 18:00:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1668 backedges. 0 proven. 1667 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:00:33,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551388730] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:00:33,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:00:33,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 47] total 69 [2021-12-06 18:00:33,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066295009] [2021-12-06 18:00:33,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:00:33,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-06 18:00:33,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:33,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-06 18:00:33,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=4467, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 18:00:33,846 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 69 states, 69 states have (on average 3.782608695652174) internal successors, (261), 69 states have internal predecessors, (261), 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 18:00:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:36,300 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2021-12-06 18:00:36,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 18:00:36,300 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.782608695652174) internal successors, (261), 69 states have internal predecessors, (261), 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 172 [2021-12-06 18:00:36,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:36,301 INFO L225 Difference]: With dead ends: 189 [2021-12-06 18:00:36,301 INFO L226 Difference]: Without dead ends: 187 [2021-12-06 18:00:36,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 313 SyntacticMatches, 12 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2608 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=512, Invalid=12370, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 18:00:36,302 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 164 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 6137 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 2247 SdHoareTripleChecker+Invalid, 6332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 6137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:36,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 2247 Invalid, 6332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 6137 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 18:00:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-06 18:00:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2021-12-06 18:00:36,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 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 18:00:36,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2021-12-06 18:00:36,342 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2021-12-06 18:00:36,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:36,343 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2021-12-06 18:00:36,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.782608695652174) internal successors, (261), 69 states have internal predecessors, (261), 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 18:00:36,343 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2021-12-06 18:00:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-06 18:00:36,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:36,343 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:36,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-12-06 18:00:36,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:36,544 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:36,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:36,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1468167269, now seen corresponding path program 50 times [2021-12-06 18:00:36,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:36,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962510090] [2021-12-06 18:00:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:36,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1746 backedges. 0 proven. 1746 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:37,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:37,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962510090] [2021-12-06 18:00:37,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962510090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:00:37,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578712907] [2021-12-06 18:00:37,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:00:37,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:37,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:37,341 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:00:37,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 18:00:37,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:00:37,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:00:37,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-06 18:00:37,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:00:37,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 18:00:37,841 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:00:37,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:00:38,662 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 19 treesize of output 7 [2021-12-06 18:00:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1746 backedges. 0 proven. 1746 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:38,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:00:38,955 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 20 treesize of output 18 [2021-12-06 18:00:38,956 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 36 treesize of output 32 [2021-12-06 18:00:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1746 backedges. 0 proven. 1746 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:39,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578712907] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:00:39,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:00:39,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 48] total 72 [2021-12-06 18:00:39,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809847294] [2021-12-06 18:00:39,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:00:39,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 18:00:39,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:39,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 18:00:39,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=4876, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 18:00:39,148 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 72 states, 72 states have (on average 3.7222222222222223) internal successors, (268), 72 states have internal predecessors, (268), 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 18:00:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:42,247 INFO L93 Difference]: Finished difference Result 188 states and 189 transitions. [2021-12-06 18:00:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-06 18:00:42,247 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.7222222222222223) internal successors, (268), 72 states have internal predecessors, (268), 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 176 [2021-12-06 18:00:42,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:42,248 INFO L225 Difference]: With dead ends: 188 [2021-12-06 18:00:42,248 INFO L226 Difference]: Without dead ends: 186 [2021-12-06 18:00:42,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 320 SyntacticMatches, 8 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=517, Invalid=13055, Unknown=0, NotChecked=0, Total=13572 [2021-12-06 18:00:42,249 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 164 mSDsluCounter, 2329 mSDsCounter, 0 mSdLazyCounter, 7507 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 2378 SdHoareTripleChecker+Invalid, 7708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 7507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:42,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 2378 Invalid, 7708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 7507 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 18:00:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-06 18:00:42,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 181. [2021-12-06 18:00:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 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 18:00:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2021-12-06 18:00:42,287 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 176 [2021-12-06 18:00:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:42,287 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2021-12-06 18:00:42,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.7222222222222223) internal successors, (268), 72 states have internal predecessors, (268), 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 18:00:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2021-12-06 18:00:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-06 18:00:42,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:42,288 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:42,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-06 18:00:42,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:42,489 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash -634625007, now seen corresponding path program 51 times [2021-12-06 18:00:42,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:42,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182695914] [2021-12-06 18:00:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:42,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:43,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:43,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182695914] [2021-12-06 18:00:43,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182695914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:00:43,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596055966] [2021-12-06 18:00:43,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:00:43,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:43,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:43,350 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:00:43,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 18:00:53,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-12-06 18:00:53,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:00:53,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 18:00:53,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:00:53,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 18:00:56,166 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:00:56,166 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 23 treesize of output 10 [2021-12-06 18:00:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 861 proven. 967 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:56,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:00:58,706 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 18 treesize of output 16 [2021-12-06 18:00:58,707 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 38 treesize of output 32 [2021-12-06 18:00:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 840 proven. 988 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:58,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596055966] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:00:58,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:00:58,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 120 [2021-12-06 18:00:58,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622326225] [2021-12-06 18:00:58,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:00:58,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-12-06 18:00:58,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:58,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-12-06 18:00:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=12766, Unknown=0, NotChecked=0, Total=14280 [2021-12-06 18:00:58,865 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 120 states, 120 states have (on average 3.725) internal successors, (447), 120 states have internal predecessors, (447), 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 18:01:02,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:02,313 INFO L93 Difference]: Finished difference Result 374 states and 378 transitions. [2021-12-06 18:01:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-12-06 18:01:02,314 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 3.725) internal successors, (447), 120 states have internal predecessors, (447), 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 180 [2021-12-06 18:01:02,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:02,315 INFO L225 Difference]: With dead ends: 374 [2021-12-06 18:01:02,315 INFO L226 Difference]: Without dead ends: 279 [2021-12-06 18:01:02,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5080 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2689, Invalid=28111, Unknown=0, NotChecked=0, Total=30800 [2021-12-06 18:01:02,316 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 131 mSDsluCounter, 2045 mSDsCounter, 0 mSdLazyCounter, 3705 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 4091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:02,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 2103 Invalid, 4091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3705 Invalid, 0 Unknown, 340 Unchecked, 1.0s Time] [2021-12-06 18:01:02,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-06 18:01:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 197. [2021-12-06 18:01:02,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2021-12-06 18:01:02,360 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 180 [2021-12-06 18:01:02,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:02,360 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2021-12-06 18:01:02,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 3.725) internal successors, (447), 120 states have internal predecessors, (447), 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 18:01:02,360 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2021-12-06 18:01:02,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-06 18:01:02,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:02,361 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:01:02,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-06 18:01:02,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:02,562 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:01:02,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:02,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1010628359, now seen corresponding path program 52 times [2021-12-06 18:01:02,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:01:02,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921926443] [2021-12-06 18:01:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:02,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:01:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2010 backedges. 0 proven. 2010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:03,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:01:03,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921926443] [2021-12-06 18:01:03,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921926443] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:01:03,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061940566] [2021-12-06 18:01:03,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:01:03,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:03,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:01:03,468 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:01:03,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-06 18:01:03,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:01:03,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:01:03,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-06 18:01:03,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:03,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 18:01:03,880 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:01:03,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:01:03,891 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:01:03,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:01:03,942 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:01:03,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:01:04,895 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 19 treesize of output 7 [2021-12-06 18:01:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2010 backedges. 3 proven. 2007 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:04,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:05,279 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 20 treesize of output 18 [2021-12-06 18:01:05,280 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 36 treesize of output 32 [2021-12-06 18:01:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2010 backedges. 0 proven. 2009 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:01:05,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061940566] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:05,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:05,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 76 [2021-12-06 18:01:05,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694212470] [2021-12-06 18:01:05,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:05,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-06 18:01:05,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:05,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-06 18:01:05,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=5448, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 18:01:05,487 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 76 states, 76 states have (on average 3.776315789473684) internal successors, (287), 76 states have internal predecessors, (287), 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 18:01:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:08,753 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2021-12-06 18:01:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-06 18:01:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.776315789473684) internal successors, (287), 76 states have internal predecessors, (287), 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 188 [2021-12-06 18:01:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:08,754 INFO L225 Difference]: With dead ends: 295 [2021-12-06 18:01:08,754 INFO L226 Difference]: Without dead ends: 293 [2021-12-06 18:01:08,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 342 SyntacticMatches, 11 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3166 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=563, Invalid=14937, Unknown=0, NotChecked=0, Total=15500 [2021-12-06 18:01:08,755 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 177 mSDsluCounter, 2588 mSDsCounter, 0 mSdLazyCounter, 7779 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2643 SdHoareTripleChecker+Invalid, 7990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 7779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:08,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 2643 Invalid, 7990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 7779 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 18:01:08,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-06 18:01:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 189. [2021-12-06 18:01:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2021-12-06 18:01:08,820 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 188 [2021-12-06 18:01:08,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:08,820 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2021-12-06 18:01:08,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.776315789473684) internal successors, (287), 76 states have internal predecessors, (287), 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 18:01:08,821 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2021-12-06 18:01:08,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-06 18:01:08,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:08,822 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:01:08,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-12-06 18:01:09,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-06 18:01:09,022 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:01:09,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:09,023 INFO L85 PathProgramCache]: Analyzing trace with hash 425791554, now seen corresponding path program 53 times [2021-12-06 18:01:09,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:01:09,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775929915] [2021-12-06 18:01:09,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:09,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:01:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 2003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:10,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:01:10,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775929915] [2021-12-06 18:01:10,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775929915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:01:10,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555682703] [2021-12-06 18:01:10,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:01:10,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:10,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:01:10,133 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:01:10,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-06 18:01:17,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-12-06 18:01:17,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:01:17,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-06 18:01:17,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:17,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:01:18,241 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 19 treesize of output 7 [2021-12-06 18:01:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 2003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:18,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:18,463 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 16 treesize of output 14 [2021-12-06 18:01:18,464 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 32 treesize of output 28 [2021-12-06 18:01:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 2003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:18,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555682703] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:18,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:18,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 74 [2021-12-06 18:01:18,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541594588] [2021-12-06 18:01:18,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:18,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-06 18:01:18,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:18,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-06 18:01:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 18:01:18,659 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 74 states, 74 states have (on average 3.824324324324324) internal successors, (283), 74 states have internal predecessors, (283), 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 18:01:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:22,298 INFO L93 Difference]: Finished difference Result 312 states and 315 transitions. [2021-12-06 18:01:22,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-12-06 18:01:22,298 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.824324324324324) internal successors, (283), 74 states have internal predecessors, (283), 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 188 [2021-12-06 18:01:22,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:22,299 INFO L225 Difference]: With dead ends: 312 [2021-12-06 18:01:22,299 INFO L226 Difference]: Without dead ends: 310 [2021-12-06 18:01:22,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 346 SyntacticMatches, 7 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4724 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=631, Invalid=20539, Unknown=0, NotChecked=0, Total=21170 [2021-12-06 18:01:22,300 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 210 mSDsluCounter, 2812 mSDsCounter, 0 mSdLazyCounter, 7843 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2868 SdHoareTripleChecker+Invalid, 8101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 7843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:22,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 2868 Invalid, 8101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 7843 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 18:01:22,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-12-06 18:01:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 205. [2021-12-06 18:01:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 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 18:01:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2021-12-06 18:01:22,355 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 188 [2021-12-06 18:01:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:22,355 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2021-12-06 18:01:22,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.824324324324324) internal successors, (283), 74 states have internal predecessors, (283), 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 18:01:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2021-12-06 18:01:22,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-06 18:01:22,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:22,356 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:01:22,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-06 18:01:22,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-06 18:01:22,557 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:01:22,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:22,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1860123960, now seen corresponding path program 54 times [2021-12-06 18:01:22,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:01:22,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247120835] [2021-12-06 18:01:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:22,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:01:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 969 proven. 1124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:23,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:01:23,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247120835] [2021-12-06 18:01:23,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247120835] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:01:23,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755817754] [2021-12-06 18:01:23,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:01:23,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:23,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:01:23,094 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:01:23,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-06 18:01:45,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-12-06 18:01:45,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:01:45,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 18:01:45,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 1058 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:46,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 1058 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:46,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755817754] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:46,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:46,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 76 [2021-12-06 18:01:46,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819937924] [2021-12-06 18:01:46,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:46,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-06 18:01:46,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:46,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-06 18:01:46,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=4372, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 18:01:46,363 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 76 states, 76 states have (on average 3.8947368421052633) internal successors, (296), 76 states have internal predecessors, (296), 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 18:01:46,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:46,900 INFO L93 Difference]: Finished difference Result 402 states and 405 transitions. [2021-12-06 18:01:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 18:01:46,900 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.8947368421052633) internal successors, (296), 76 states have internal predecessors, (296), 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 192 [2021-12-06 18:01:46,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:46,901 INFO L225 Difference]: With dead ends: 402 [2021-12-06 18:01:46,901 INFO L226 Difference]: Without dead ends: 299 [2021-12-06 18:01:46,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2253, Invalid=7647, Unknown=0, NotChecked=0, Total=9900 [2021-12-06 18:01:46,902 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 461 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:46,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 533 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:01:46,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-12-06 18:01:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 205. [2021-12-06 18:01:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0147058823529411) internal successors, (207), 204 states have internal predecessors, (207), 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 18:01:46,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2021-12-06 18:01:46,956 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 192 [2021-12-06 18:01:46,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:46,956 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2021-12-06 18:01:46,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.8947368421052633) internal successors, (296), 76 states have internal predecessors, (296), 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 18:01:46,957 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2021-12-06 18:01:46,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-06 18:01:46,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:46,957 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:01:46,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-12-06 18:01:47,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-06 18:01:47,159 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:01:47,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:47,160 INFO L85 PathProgramCache]: Analyzing trace with hash -327004872, now seen corresponding path program 55 times [2021-12-06 18:01:47,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:01:47,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889769435] [2021-12-06 18:01:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:47,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:01:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 0 proven. 2193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:48,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:01:48,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889769435] [2021-12-06 18:01:48,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889769435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:01:48,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817532539] [2021-12-06 18:01:48,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:01:48,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:48,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:01:48,174 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:01:48,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-06 18:01:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:48,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-06 18:01:48,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:48,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 18:01:48,580 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:01:48,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:01:48,590 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:01:48,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:01:48,634 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:01:48,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:01:49,550 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 19 treesize of output 7 [2021-12-06 18:01:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 3 proven. 2190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:49,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:49,982 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 20 treesize of output 18 [2021-12-06 18:01:49,984 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 36 treesize of output 32 [2021-12-06 18:01:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 0 proven. 2192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:01:50,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817532539] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:50,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:50,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 53] total 78 [2021-12-06 18:01:50,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705106841] [2021-12-06 18:01:50,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:50,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-06 18:01:50,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:50,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-06 18:01:50,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5751, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 18:01:50,184 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 78 states, 78 states have (on average 3.8076923076923075) internal successors, (297), 78 states have internal predecessors, (297), 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 18:01:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:53,378 INFO L93 Difference]: Finished difference Result 307 states and 309 transitions. [2021-12-06 18:01:53,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-06 18:01:53,378 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.8076923076923075) internal successors, (297), 78 states have internal predecessors, (297), 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 196 [2021-12-06 18:01:53,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:53,379 INFO L225 Difference]: With dead ends: 307 [2021-12-06 18:01:53,379 INFO L226 Difference]: Without dead ends: 305 [2021-12-06 18:01:53,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 357 SyntacticMatches, 12 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3301 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=578, Invalid=15934, Unknown=0, NotChecked=0, Total=16512 [2021-12-06 18:01:53,380 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 191 mSDsluCounter, 2702 mSDsCounter, 0 mSdLazyCounter, 8025 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 2759 SdHoareTripleChecker+Invalid, 8253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 8025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:53,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 2759 Invalid, 8253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 8025 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 18:01:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-06 18:01:53,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 197. [2021-12-06 18:01:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 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 18:01:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-12-06 18:01:53,432 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 196 [2021-12-06 18:01:53,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:53,432 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-12-06 18:01:53,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.8076923076923075) internal successors, (297), 78 states have internal predecessors, (297), 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 18:01:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-12-06 18:01:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-06 18:01:53,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:53,433 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:01:53,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-12-06 18:01:53,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-06 18:01:53,634 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:01:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:53,635 INFO L85 PathProgramCache]: Analyzing trace with hash -80654093, now seen corresponding path program 56 times [2021-12-06 18:01:53,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:01:53,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708513248] [2021-12-06 18:01:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:53,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:01:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2186 backedges. 0 proven. 2186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:54,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:01:54,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708513248] [2021-12-06 18:01:54,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708513248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:01:54,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161640960] [2021-12-06 18:01:54,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:01:54,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:54,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:01:54,940 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:01:54,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-06 18:01:55,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:01:55,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:01:55,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-06 18:01:55,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:55,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:01:56,450 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 19 treesize of output 7 [2021-12-06 18:01:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2186 backedges. 0 proven. 2186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:56,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:56,709 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 16 treesize of output 14 [2021-12-06 18:01:56,710 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 32 treesize of output 28 [2021-12-06 18:01:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2186 backedges. 0 proven. 2186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:56,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161640960] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:56,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:56,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 77 [2021-12-06 18:01:56,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289211321] [2021-12-06 18:01:56,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:56,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-06 18:01:56,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:56,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-06 18:01:56,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 18:01:56,945 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 77 states, 77 states have (on average 3.831168831168831) internal successors, (295), 77 states have internal predecessors, (295), 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 18:02:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:02:01,015 INFO L93 Difference]: Finished difference Result 324 states and 327 transitions. [2021-12-06 18:02:01,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-12-06 18:02:01,015 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.831168831168831) internal successors, (295), 77 states have internal predecessors, (295), 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 196 [2021-12-06 18:02:01,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:02:01,017 INFO L225 Difference]: With dead ends: 324 [2021-12-06 18:02:01,017 INFO L226 Difference]: Without dead ends: 322 [2021-12-06 18:02:01,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 361 SyntacticMatches, 7 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5121 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=657, Invalid=22295, Unknown=0, NotChecked=0, Total=22952 [2021-12-06 18:02:01,019 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 214 mSDsluCounter, 3022 mSDsCounter, 0 mSdLazyCounter, 9252 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 3080 SdHoareTripleChecker+Invalid, 9519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 9252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:02:01,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 3080 Invalid, 9519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 9252 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 18:02:01,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-12-06 18:02:01,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 213. [2021-12-06 18:02:01,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0188679245283019) internal successors, (216), 212 states have internal predecessors, (216), 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 18:02:01,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2021-12-06 18:02:01,091 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 196 [2021-12-06 18:02:01,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:02:01,091 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2021-12-06 18:02:01,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.831168831168831) internal successors, (295), 77 states have internal predecessors, (295), 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 18:02:01,091 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2021-12-06 18:02:01,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-06 18:02:01,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:02:01,092 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:02:01,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-12-06 18:02:01,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:02:01,292 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:02:01,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:02:01,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2018360681, now seen corresponding path program 57 times [2021-12-06 18:02:01,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:02:01,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690013239] [2021-12-06 18:02:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:02:01,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:02:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:02:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 1059 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:01,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:02:01,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690013239] [2021-12-06 18:02:01,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690013239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:02:01,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855552587] [2021-12-06 18:02:01,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:02:01,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:02:01,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:02:01,820 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:02:01,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-06 18:02:11,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-12-06 18:02:11,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:02:11,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 18:02:11,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:02:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 1152 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:12,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:02:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 1152 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:12,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855552587] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:02:12,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:02:12,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 79 [2021-12-06 18:02:12,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544714227] [2021-12-06 18:02:12,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:02:12,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-06 18:02:12,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:02:12,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-06 18:02:12,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=4729, Unknown=0, NotChecked=0, Total=6162 [2021-12-06 18:02:12,931 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand has 79 states, 79 states have (on average 3.8987341772151898) internal successors, (308), 79 states have internal predecessors, (308), 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 18:02:13,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:02:13,488 INFO L93 Difference]: Finished difference Result 418 states and 421 transitions. [2021-12-06 18:02:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 18:02:13,488 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.8987341772151898) internal successors, (308), 79 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-12-06 18:02:13,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:02:13,489 INFO L225 Difference]: With dead ends: 418 [2021-12-06 18:02:13,489 INFO L226 Difference]: Without dead ends: 311 [2021-12-06 18:02:13,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2434, Invalid=8278, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 18:02:13,490 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 470 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:02:13,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 429 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:02:13,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-12-06 18:02:13,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 213. [2021-12-06 18:02:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 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 18:02:13,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2021-12-06 18:02:13,551 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 200 [2021-12-06 18:02:13,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:02:13,551 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2021-12-06 18:02:13,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.8987341772151898) internal successors, (308), 79 states have internal predecessors, (308), 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 18:02:13,551 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2021-12-06 18:02:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-06 18:02:13,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:02:13,552 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:02:13,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-06 18:02:13,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:02:13,753 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:02:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:02:13,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1592182807, now seen corresponding path program 58 times [2021-12-06 18:02:13,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:02:13,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890182402] [2021-12-06 18:02:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:02:13,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:02:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:02:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2384 backedges. 0 proven. 2384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:14,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:02:14,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890182402] [2021-12-06 18:02:14,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890182402] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:02:14,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019554108] [2021-12-06 18:02:14,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:02:14,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:02:14,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:02:14,865 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:02:14,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-06 18:02:15,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:02:15,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:02:15,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 111 conjunts are in the unsatisfiable core [2021-12-06 18:02:15,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:02:15,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 18:02:15,321 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:02:15,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:02:15,330 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:02:15,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:02:15,378 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:02:15,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:02:16,427 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 19 treesize of output 7 [2021-12-06 18:02:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2384 backedges. 3 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:16,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:02:16,897 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 20 treesize of output 18 [2021-12-06 18:02:16,898 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 36 treesize of output 32 [2021-12-06 18:02:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2384 backedges. 0 proven. 2383 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:02:17,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019554108] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:02:17,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:02:17,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 55] total 82 [2021-12-06 18:02:17,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005032173] [2021-12-06 18:02:17,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:02:17,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 18:02:17,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:02:17,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 18:02:17,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=6370, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 18:02:17,101 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand has 82 states, 82 states have (on average 3.792682926829268) internal successors, (311), 82 states have internal predecessors, (311), 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 18:02:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:02:20,976 INFO L93 Difference]: Finished difference Result 319 states and 321 transitions. [2021-12-06 18:02:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-12-06 18:02:20,976 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.792682926829268) internal successors, (311), 82 states have internal predecessors, (311), 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 204 [2021-12-06 18:02:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:02:20,978 INFO L225 Difference]: With dead ends: 319 [2021-12-06 18:02:20,978 INFO L226 Difference]: Without dead ends: 317 [2021-12-06 18:02:20,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 372 SyntacticMatches, 11 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3663 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=607, Invalid=17483, Unknown=0, NotChecked=0, Total=18090 [2021-12-06 18:02:20,979 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 146 mSDsluCounter, 3388 mSDsCounter, 0 mSdLazyCounter, 9900 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 3447 SdHoareTripleChecker+Invalid, 10088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 9900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:02:20,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 3447 Invalid, 10088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 9900 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 18:02:20,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-06 18:02:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 205. [2021-12-06 18:02:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 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 18:02:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2021-12-06 18:02:21,041 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 204 [2021-12-06 18:02:21,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:02:21,041 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2021-12-06 18:02:21,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.792682926829268) internal successors, (311), 82 states have internal predecessors, (311), 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 18:02:21,041 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2021-12-06 18:02:21,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-06 18:02:21,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:02:21,042 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:02:21,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-12-06 18:02:21,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:02:21,243 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:02:21,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:02:21,245 INFO L85 PathProgramCache]: Analyzing trace with hash -187046364, now seen corresponding path program 59 times [2021-12-06 18:02:21,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:02:21,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270573175] [2021-12-06 18:02:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:02:21,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:02:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:02:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2377 backedges. 0 proven. 2377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:22,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:02:22,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270573175] [2021-12-06 18:02:22,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270573175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:02:22,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167789064] [2021-12-06 18:02:22,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:02:22,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:02:22,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:02:22,338 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:02:22,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-06 18:02:27,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-06 18:02:27,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:02:27,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-06 18:02:27,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:02:28,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:02:29,278 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 19 treesize of output 7 [2021-12-06 18:02:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2377 backedges. 0 proven. 2377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:29,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:02:29,532 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 16 treesize of output 14 [2021-12-06 18:02:29,533 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 32 treesize of output 28 [2021-12-06 18:02:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2377 backedges. 0 proven. 2377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:29,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167789064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:02:29,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:02:29,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 81 [2021-12-06 18:02:29,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139787327] [2021-12-06 18:02:29,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:02:29,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-06 18:02:29,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:02:29,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-06 18:02:29,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6241, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 18:02:29,744 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 81 states, 81 states have (on average 3.7901234567901234) internal successors, (307), 81 states have internal predecessors, (307), 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 18:02:34,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:02:34,051 INFO L93 Difference]: Finished difference Result 336 states and 339 transitions. [2021-12-06 18:02:34,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-12-06 18:02:34,052 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.7901234567901234) internal successors, (307), 81 states have internal predecessors, (307), 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 204 [2021-12-06 18:02:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:02:34,053 INFO L225 Difference]: With dead ends: 336 [2021-12-06 18:02:34,053 INFO L226 Difference]: Without dead ends: 334 [2021-12-06 18:02:34,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 376 SyntacticMatches, 6 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5615 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=690, Invalid=24432, Unknown=0, NotChecked=0, Total=25122 [2021-12-06 18:02:34,054 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 217 mSDsluCounter, 3154 mSDsCounter, 0 mSdLazyCounter, 9831 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 10107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 9831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:02:34,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 3214 Invalid, 10107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 9831 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 18:02:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-12-06 18:02:34,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 221. [2021-12-06 18:02:34,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.018181818181818) internal successors, (224), 220 states have internal predecessors, (224), 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 18:02:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 224 transitions. [2021-12-06 18:02:34,123 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 224 transitions. Word has length 204 [2021-12-06 18:02:34,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:02:34,123 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 224 transitions. [2021-12-06 18:02:34,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.7901234567901234) internal successors, (307), 81 states have internal predecessors, (307), 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 18:02:34,123 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 224 transitions. [2021-12-06 18:02:34,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-06 18:02:34,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:02:34,124 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:02:34,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-06 18:02:34,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:02:34,325 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:02:34,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:02:34,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1806282214, now seen corresponding path program 60 times [2021-12-06 18:02:34,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:02:34,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482095507] [2021-12-06 18:02:34,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:02:34,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:02:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:02:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 1153 proven. 1322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:34,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:02:34,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482095507] [2021-12-06 18:02:34,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482095507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:02:34,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194776120] [2021-12-06 18:02:34,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:02:34,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:02:34,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:02:34,994 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:02:34,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-06 18:02:56,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-12-06 18:02:56,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:02:56,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 18:02:56,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:02:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 1250 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:57,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:02:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 1250 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:57,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194776120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:02:57,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:02:57,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 82 [2021-12-06 18:02:57,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267152285] [2021-12-06 18:02:57,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:02:57,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 18:02:57,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:02:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 18:02:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=5100, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 18:02:57,564 INFO L87 Difference]: Start difference. First operand 221 states and 224 transitions. Second operand has 82 states, 82 states have (on average 3.902439024390244) internal successors, (320), 82 states have internal predecessors, (320), 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 18:02:58,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:02:58,192 INFO L93 Difference]: Finished difference Result 434 states and 437 transitions. [2021-12-06 18:02:58,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 18:02:58,192 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.902439024390244) internal successors, (320), 82 states have internal predecessors, (320), 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 208 [2021-12-06 18:02:58,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:02:58,193 INFO L225 Difference]: With dead ends: 434 [2021-12-06 18:02:58,193 INFO L226 Difference]: Without dead ends: 323 [2021-12-06 18:02:58,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2923 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2622, Invalid=8934, Unknown=0, NotChecked=0, Total=11556 [2021-12-06 18:02:58,194 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 717 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:02:58,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 365 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:02:58,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-06 18:02:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 221. [2021-12-06 18:02:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0136363636363637) internal successors, (223), 220 states have internal predecessors, (223), 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 18:02:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2021-12-06 18:02:58,263 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 208 [2021-12-06 18:02:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:02:58,263 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2021-12-06 18:02:58,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.902439024390244) internal successors, (320), 82 states have internal predecessors, (320), 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 18:02:58,263 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2021-12-06 18:02:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-06 18:02:58,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:02:58,264 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:02:58,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-12-06 18:02:58,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-12-06 18:02:58,465 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:02:58,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:02:58,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1187088614, now seen corresponding path program 61 times [2021-12-06 18:02:58,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:02:58,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136739475] [2021-12-06 18:02:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:02:58,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:02:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:02:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:59,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:02:59,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136739475] [2021-12-06 18:02:59,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136739475] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:02:59,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104482628] [2021-12-06 18:02:59,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:02:59,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:02:59,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:02:59,743 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:02:59,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-06 18:02:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:02:59,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-06 18:02:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:00,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 18:03:00,230 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:03:00,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:03:00,239 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:03:00,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:03:00,291 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:03:00,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:03:01,412 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 19 treesize of output 7 [2021-12-06 18:03:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 3 proven. 2580 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:01,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:03:01,870 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 20 treesize of output 18 [2021-12-06 18:03:01,871 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 36 treesize of output 32 [2021-12-06 18:03:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 2582 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:03:02,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104482628] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:03:02,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:03:02,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 57] total 85 [2021-12-06 18:03:02,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275028001] [2021-12-06 18:03:02,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:03:02,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-06 18:03:02,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:03:02,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-06 18:03:02,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=6858, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 18:03:02,085 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand has 85 states, 85 states have (on average 3.8) internal successors, (323), 85 states have internal predecessors, (323), 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 18:03:06,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:06,029 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2021-12-06 18:03:06,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-06 18:03:06,030 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.8) internal successors, (323), 85 states have internal predecessors, (323), 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 212 [2021-12-06 18:03:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:06,031 INFO L225 Difference]: With dead ends: 331 [2021-12-06 18:03:06,031 INFO L226 Difference]: Without dead ends: 329 [2021-12-06 18:03:06,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 387 SyntacticMatches, 11 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3925 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=629, Invalid=18831, Unknown=0, NotChecked=0, Total=19460 [2021-12-06 18:03:06,032 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 207 mSDsluCounter, 3363 mSDsCounter, 0 mSdLazyCounter, 10218 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 3424 SdHoareTripleChecker+Invalid, 10463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 10218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:06,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 3424 Invalid, 10463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 10218 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 18:03:06,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-06 18:03:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 213. [2021-12-06 18:03:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 states have internal predecessors, (214), 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 18:03:06,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2021-12-06 18:03:06,105 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 212 [2021-12-06 18:03:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:06,105 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2021-12-06 18:03:06,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.8) internal successors, (323), 85 states have internal predecessors, (323), 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 18:03:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2021-12-06 18:03:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-06 18:03:06,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:06,106 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:06,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-06 18:03:06,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-12-06 18:03:06,307 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:03:06,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:06,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1002991659, now seen corresponding path program 62 times [2021-12-06 18:03:06,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:03:06,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588749337] [2021-12-06 18:03:06,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:06,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:03:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 2576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:07,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:03:07,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588749337] [2021-12-06 18:03:07,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588749337] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:03:07,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835225808] [2021-12-06 18:03:07,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:03:07,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:03:07,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:03:07,463 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:03:07,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-06 18:03:07,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:03:07,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:03:07,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 111 conjunts are in the unsatisfiable core [2021-12-06 18:03:07,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:08,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:03:09,243 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 19 treesize of output 7 [2021-12-06 18:03:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 2576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:09,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:03:09,485 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 16 treesize of output 14 [2021-12-06 18:03:09,486 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 32 treesize of output 28 [2021-12-06 18:03:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 2576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:09,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835225808] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:03:09,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:03:09,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 84 [2021-12-06 18:03:09,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973781373] [2021-12-06 18:03:09,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:03:09,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-06 18:03:09,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:03:09,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-06 18:03:09,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6724, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 18:03:09,701 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 84 states, 84 states have (on average 3.7976190476190474) internal successors, (319), 84 states have internal predecessors, (319), 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 18:03:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:14,316 INFO L93 Difference]: Finished difference Result 348 states and 351 transitions. [2021-12-06 18:03:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-12-06 18:03:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.7976190476190474) internal successors, (319), 84 states have internal predecessors, (319), 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 212 [2021-12-06 18:03:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:14,318 INFO L225 Difference]: With dead ends: 348 [2021-12-06 18:03:14,318 INFO L226 Difference]: Without dead ends: 346 [2021-12-06 18:03:14,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 391 SyntacticMatches, 6 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6047 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=716, Invalid=26344, Unknown=0, NotChecked=0, Total=27060 [2021-12-06 18:03:14,319 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 232 mSDsluCounter, 3563 mSDsCounter, 0 mSdLazyCounter, 10315 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 10606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 10315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:14,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 3625 Invalid, 10606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 10315 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 18:03:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-06 18:03:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 229. [2021-12-06 18:03:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0175438596491229) internal successors, (232), 228 states have internal predecessors, (232), 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 18:03:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 232 transitions. [2021-12-06 18:03:14,397 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 232 transitions. Word has length 212 [2021-12-06 18:03:14,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:14,397 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 232 transitions. [2021-12-06 18:03:14,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.7976190476190474) internal successors, (319), 84 states have internal predecessors, (319), 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 18:03:14,397 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 232 transitions. [2021-12-06 18:03:14,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-06 18:03:14,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:14,398 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:14,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-06 18:03:14,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-06 18:03:14,599 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:03:14,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:14,600 INFO L85 PathProgramCache]: Analyzing trace with hash -998917301, now seen corresponding path program 63 times [2021-12-06 18:03:14,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:03:14,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889494068] [2021-12-06 18:03:14,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:14,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:03:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 1251 proven. 1427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:15,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:03:15,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889494068] [2021-12-06 18:03:15,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889494068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:03:15,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303423496] [2021-12-06 18:03:15,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:03:15,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:03:15,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:03:15,232 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:03:15,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-06 18:03:40,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-12-06 18:03:40,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:03:40,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 18:03:40,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:40,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 18:03:42,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 18:03:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 1352 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:42,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:03:52,513 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 18 treesize of output 16 [2021-12-06 18:03:52,515 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 38 treesize of output 32 [2021-12-06 18:03:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 1300 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:52,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303423496] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:03:52,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:03:52,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 58, 59] total 119 [2021-12-06 18:03:52,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390866696] [2021-12-06 18:03:52,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:03:52,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-06 18:03:52,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:03:52,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-06 18:03:52,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3011, Invalid=11027, Unknown=4, NotChecked=0, Total=14042 [2021-12-06 18:03:52,760 INFO L87 Difference]: Start difference. First operand 229 states and 232 transitions. Second operand has 119 states, 119 states have (on average 3.764705882352941) internal successors, (448), 119 states have internal predecessors, (448), 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 18:03:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:57,416 INFO L93 Difference]: Finished difference Result 448 states and 452 transitions. [2021-12-06 18:03:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-12-06 18:03:57,417 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.764705882352941) internal successors, (448), 119 states have internal predecessors, (448), 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 216 [2021-12-06 18:03:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:57,418 INFO L225 Difference]: With dead ends: 448 [2021-12-06 18:03:57,418 INFO L226 Difference]: Without dead ends: 223 [2021-12-06 18:03:57,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11274 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=5543, Invalid=27395, Unknown=4, NotChecked=0, Total=32942 [2021-12-06 18:03:57,419 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 178 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:57,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 778 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 185 Invalid, 0 Unknown, 280 Unchecked, 0.1s Time] [2021-12-06 18:03:57,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-06 18:03:57,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2021-12-06 18:03:57,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.009090909090909) internal successors, (222), 220 states have internal predecessors, (222), 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 18:03:57,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2021-12-06 18:03:57,494 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 216 [2021-12-06 18:03:57,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:57,494 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2021-12-06 18:03:57,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.764705882352941) internal successors, (448), 119 states have internal predecessors, (448), 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 18:03:57,494 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2021-12-06 18:03:57,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-06 18:03:57,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:57,495 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:57,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-06 18:03:57,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-06 18:03:57,696 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:03:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:57,696 INFO L85 PathProgramCache]: Analyzing trace with hash -590427445, now seen corresponding path program 64 times [2021-12-06 18:03:57,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:03:57,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846116865] [2021-12-06 18:03:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:57,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:03:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2790 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:59,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:03:59,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846116865] [2021-12-06 18:03:59,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846116865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:03:59,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506726512] [2021-12-06 18:03:59,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:03:59,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:03:59,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:03:59,052 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:03:59,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-06 18:03:59,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:03:59,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:03:59,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-06 18:03:59,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:59,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 18:03:59,739 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:03:59,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:03:59,750 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:03:59,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:03:59,808 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:03:59,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:04:01,106 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 19 treesize of output 7 [2021-12-06 18:04:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 3 proven. 2787 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:01,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:04:01,584 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 20 treesize of output 18 [2021-12-06 18:04:01,586 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 36 treesize of output 32 [2021-12-06 18:04:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2789 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:04:01,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506726512] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:04:01,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:04:01,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 59] total 88 [2021-12-06 18:04:01,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990148818] [2021-12-06 18:04:01,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:04:01,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-06 18:04:01,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:04:01,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-06 18:04:01,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=7364, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 18:04:01,826 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 88 states, 88 states have (on average 3.8068181818181817) internal successors, (335), 88 states have internal predecessors, (335), 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 18:04:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:06,209 INFO L93 Difference]: Finished difference Result 237 states and 238 transitions. [2021-12-06 18:04:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-12-06 18:04:06,210 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.8068181818181817) internal successors, (335), 88 states have internal predecessors, (335), 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 220 [2021-12-06 18:04:06,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:06,211 INFO L225 Difference]: With dead ends: 237 [2021-12-06 18:04:06,211 INFO L226 Difference]: Without dead ends: 235 [2021-12-06 18:04:06,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 402 SyntacticMatches, 11 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4196 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=651, Invalid=20229, Unknown=0, NotChecked=0, Total=20880 [2021-12-06 18:04:06,212 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 220 mSDsluCounter, 3542 mSDsCounter, 0 mSdLazyCounter, 10027 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 3605 SdHoareTripleChecker+Invalid, 10284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 10027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:04:06,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 3605 Invalid, 10284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 10027 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 18:04:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-06 18:04:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 225. [2021-12-06 18:04:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 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 18:04:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2021-12-06 18:04:06,287 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 220 [2021-12-06 18:04:06,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:06,287 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2021-12-06 18:04:06,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.8068181818181817) internal successors, (335), 88 states have internal predecessors, (335), 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 18:04:06,287 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2021-12-06 18:04:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-06 18:04:06,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:06,288 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:04:06,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-12-06 18:04:06,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:04:06,490 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:04:06,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:06,491 INFO L85 PathProgramCache]: Analyzing trace with hash -127235263, now seen corresponding path program 65 times [2021-12-06 18:04:06,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:04:06,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666468711] [2021-12-06 18:04:06,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:06,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:04:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2892 backedges. 0 proven. 2892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:07,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:04:07,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666468711] [2021-12-06 18:04:07,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666468711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:04:07,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547705941] [2021-12-06 18:04:07,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:04:07,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:04:07,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:04:07,905 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:04:07,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-06 18:04:24,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-12-06 18:04:24,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:04:24,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-06 18:04:24,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:25,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 18:04:25,214 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:04:25,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:04:26,574 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 19 treesize of output 7 [2021-12-06 18:04:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2892 backedges. 0 proven. 2892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:26,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:04:26,967 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 20 treesize of output 18 [2021-12-06 18:04:26,969 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 36 treesize of output 32 [2021-12-06 18:04:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2892 backedges. 0 proven. 2892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:27,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547705941] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:04:27,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:04:27,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 60] total 90 [2021-12-06 18:04:27,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608207949] [2021-12-06 18:04:27,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:04:27,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-06 18:04:27,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:04:27,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-06 18:04:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=7714, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 18:04:27,208 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 90 states, 90 states have (on average 3.7777777777777777) internal successors, (340), 90 states have internal predecessors, (340), 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 18:04:31,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:31,425 INFO L93 Difference]: Finished difference Result 236 states and 237 transitions. [2021-12-06 18:04:31,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-12-06 18:04:31,426 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.7777777777777777) internal successors, (340), 90 states have internal predecessors, (340), 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 224 [2021-12-06 18:04:31,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:31,426 INFO L225 Difference]: With dead ends: 236 [2021-12-06 18:04:31,427 INFO L226 Difference]: Without dead ends: 234 [2021-12-06 18:04:31,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 410 SyntacticMatches, 8 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4087 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=649, Invalid=20813, Unknown=0, NotChecked=0, Total=21462 [2021-12-06 18:04:31,427 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 221 mSDsluCounter, 3470 mSDsCounter, 0 mSdLazyCounter, 10148 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 3531 SdHoareTripleChecker+Invalid, 10417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 10148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:04:31,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 3531 Invalid, 10417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 10148 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 18:04:31,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-06 18:04:31,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2021-12-06 18:04:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0087719298245614) internal successors, (230), 228 states have internal predecessors, (230), 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 18:04:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2021-12-06 18:04:31,505 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 224 [2021-12-06 18:04:31,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:31,506 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2021-12-06 18:04:31,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.7777777777777777) internal successors, (340), 90 states have internal predecessors, (340), 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 18:04:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2021-12-06 18:04:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-06 18:04:31,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:31,507 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:04:31,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-12-06 18:04:31,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-06 18:04:31,708 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:04:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:31,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1722097847, now seen corresponding path program 66 times [2021-12-06 18:04:31,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:04:31,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673976749] [2021-12-06 18:04:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:31,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:04:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2998 backedges. 0 proven. 2998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:33,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:04:33,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673976749] [2021-12-06 18:04:33,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673976749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:04:33,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512771089] [2021-12-06 18:04:33,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:04:33,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:04:33,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:04:33,118 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:04:33,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-06 18:05:08,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-12-06 18:05:08,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:05:08,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 18:05:08,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:05:09,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 18:05:12,834 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:05:12,834 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 23 treesize of output 10 [2021-12-06 18:05:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2998 backedges. 1431 proven. 1567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:05:12,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:05:16,917 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 18 treesize of output 16 [2021-12-06 18:05:16,919 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 38 treesize of output 32 [2021-12-06 18:05:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2998 backedges. 1404 proven. 1594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:05:17,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512771089] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:05:17,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:05:17,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 150 [2021-12-06 18:05:17,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401842208] [2021-12-06 18:05:17,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:05:17,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2021-12-06 18:05:17,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:05:17,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2021-12-06 18:05:17,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2339, Invalid=20011, Unknown=0, NotChecked=0, Total=22350 [2021-12-06 18:05:17,119 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 150 states, 150 states have (on average 3.78) internal successors, (567), 150 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:05:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:05:28,379 INFO L93 Difference]: Finished difference Result 479 states and 483 transitions. [2021-12-06 18:05:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-12-06 18:05:28,380 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 3.78) internal successors, (567), 150 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2021-12-06 18:05:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:05:28,381 INFO L225 Difference]: With dead ends: 479 [2021-12-06 18:05:28,381 INFO L226 Difference]: Without dead ends: 360 [2021-12-06 18:05:28,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 397 SyntacticMatches, 1 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17487 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=6247, Invalid=79895, Unknown=0, NotChecked=0, Total=86142 [2021-12-06 18:05:28,384 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 385 mSDsluCounter, 5522 mSDsCounter, 0 mSdLazyCounter, 8551 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 5640 SdHoareTripleChecker+Invalid, 9755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 8551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 975 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:05:28,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 5640 Invalid, 9755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 8551 Invalid, 0 Unknown, 975 Unchecked, 2.6s Time] [2021-12-06 18:05:28,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-06 18:05:28,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 245. [2021-12-06 18:05:28,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0122950819672132) internal successors, (247), 244 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:05:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2021-12-06 18:05:28,471 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 228 [2021-12-06 18:05:28,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:05:28,471 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2021-12-06 18:05:28,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 3.78) internal successors, (567), 150 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:05:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2021-12-06 18:05:28,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-06 18:05:28,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:05:28,472 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:05:28,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-12-06 18:05:28,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-06 18:05:28,674 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:05:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:05:28,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1891872685, now seen corresponding path program 67 times [2021-12-06 18:05:28,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:05:28,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433963475] [2021-12-06 18:05:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:05:28,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:05:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:05:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3228 backedges. 0 proven. 3228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:05:30,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:05:30,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433963475] [2021-12-06 18:05:30,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433963475] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:05:30,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947691792] [2021-12-06 18:05:30,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:05:30,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:05:30,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:05:30,116 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:05:30,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-06 18:05:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:05:30,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-06 18:05:30,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:05:30,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 18:05:30,836 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:05:30,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:05:30,846 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:05:30,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:05:30,904 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:05:30,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:05:32,420 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 19 treesize of output 7 [2021-12-06 18:05:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3228 backedges. 3 proven. 3225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:05:32,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:05:32,941 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 20 treesize of output 18 [2021-12-06 18:05:32,942 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 36 treesize of output 32 [2021-12-06 18:05:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3228 backedges. 0 proven. 3227 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:05:33,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947691792] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:05:33,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:05:33,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 63] total 94 [2021-12-06 18:05:33,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145503587] [2021-12-06 18:05:33,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:05:33,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 18:05:33,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:05:33,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 18:05:33,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=8430, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 18:05:33,183 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand has 94 states, 94 states have (on average 3.8191489361702127) internal successors, (359), 94 states have internal predecessors, (359), 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 18:05:38,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:05:38,102 INFO L93 Difference]: Finished difference Result 367 states and 369 transitions. [2021-12-06 18:05:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-12-06 18:05:38,102 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.8191489361702127) internal successors, (359), 94 states have internal predecessors, (359), 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 236 [2021-12-06 18:05:38,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:05:38,104 INFO L225 Difference]: With dead ends: 367 [2021-12-06 18:05:38,104 INFO L226 Difference]: Without dead ends: 365 [2021-12-06 18:05:38,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 432 SyntacticMatches, 11 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4765 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=695, Invalid=23175, Unknown=0, NotChecked=0, Total=23870 [2021-12-06 18:05:38,105 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 170 mSDsluCounter, 4039 mSDsCounter, 0 mSdLazyCounter, 11867 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 4106 SdHoareTripleChecker+Invalid, 12086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 11867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:05:38,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 4106 Invalid, 12086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 11867 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-06 18:05:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-06 18:05:38,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 237. [2021-12-06 18:05:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 states have internal predecessors, (238), 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 18:05:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2021-12-06 18:05:38,191 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 236 [2021-12-06 18:05:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:05:38,192 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2021-12-06 18:05:38,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.8191489361702127) internal successors, (359), 94 states have internal predecessors, (359), 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 18:05:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2021-12-06 18:05:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-06 18:05:38,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:05:38,193 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:05:38,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-12-06 18:05:38,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:05:38,394 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:05:38,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:05:38,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1351518184, now seen corresponding path program 68 times [2021-12-06 18:05:38,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:05:38,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016024829] [2021-12-06 18:05:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:05:38,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:05:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:05:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3221 backedges. 0 proven. 3221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:05:39,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:05:39,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016024829] [2021-12-06 18:05:39,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016024829] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:05:39,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401744819] [2021-12-06 18:05:39,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:05:39,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:05:39,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:05:39,763 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:05:39,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-06 18:05:40,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:05:40,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:05:40,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-06 18:05:40,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:05:40,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:05:41,980 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 19 treesize of output 7 [2021-12-06 18:05:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3221 backedges. 0 proven. 3221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:05:42,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:05:42,246 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 16 treesize of output 14 [2021-12-06 18:05:42,248 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 32 treesize of output 28 [2021-12-06 18:05:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3221 backedges. 0 proven. 3221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:05:42,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401744819] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:05:42,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:05:42,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 93 [2021-12-06 18:05:42,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033735265] [2021-12-06 18:05:42,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:05:42,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-12-06 18:05:42,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:05:42,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-12-06 18:05:42,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=8281, Unknown=0, NotChecked=0, Total=8556 [2021-12-06 18:05:42,534 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand has 93 states, 93 states have (on average 3.817204301075269) internal successors, (355), 93 states have internal predecessors, (355), 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 18:05:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:05:48,691 INFO L93 Difference]: Finished difference Result 384 states and 387 transitions. [2021-12-06 18:05:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-12-06 18:05:48,691 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.817204301075269) internal successors, (355), 93 states have internal predecessors, (355), 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 236 [2021-12-06 18:05:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:05:48,692 INFO L225 Difference]: With dead ends: 384 [2021-12-06 18:05:48,692 INFO L226 Difference]: Without dead ends: 382 [2021-12-06 18:05:48,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 436 SyntacticMatches, 6 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7439 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=794, Invalid=32512, Unknown=0, NotChecked=0, Total=33306 [2021-12-06 18:05:48,694 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 256 mSDsluCounter, 4111 mSDsCounter, 0 mSdLazyCounter, 12646 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 4179 SdHoareTripleChecker+Invalid, 12970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 12646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:05:48,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 4179 Invalid, 12970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 12646 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-06 18:05:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-06 18:05:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 253. [2021-12-06 18:05:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.0158730158730158) internal successors, (256), 252 states have internal predecessors, (256), 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 18:05:48,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 256 transitions. [2021-12-06 18:05:48,792 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 256 transitions. Word has length 236 [2021-12-06 18:05:48,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:05:48,792 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 256 transitions. [2021-12-06 18:05:48,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.817204301075269) internal successors, (355), 93 states have internal predecessors, (355), 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 18:05:48,792 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 256 transitions. [2021-12-06 18:05:48,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-06 18:05:48,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:05:48,793 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:05:48,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-12-06 18:05:48,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:05:48,994 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:05:48,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:05:48,995 INFO L85 PathProgramCache]: Analyzing trace with hash -576949794, now seen corresponding path program 69 times [2021-12-06 18:05:48,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:05:48,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100626144] [2021-12-06 18:05:48,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:05:48,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:05:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:05:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 1569 proven. 1766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:05:49,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:05:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100626144] [2021-12-06 18:05:49,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100626144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:05:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801004291] [2021-12-06 18:05:49,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:05:49,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:05:49,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:05:49,777 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:05:49,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-06 18:06:22,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-12-06 18:06:22,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:06:22,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 18:06:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:06:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 1682 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:06:23,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:06:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 1682 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:06:23,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801004291] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:06:23,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:06:23,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 94 [2021-12-06 18:06:23,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397198157] [2021-12-06 18:06:23,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:06:23,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 18:06:23,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:06:23,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 18:06:23,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=6724, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 18:06:23,584 INFO L87 Difference]: Start difference. First operand 253 states and 256 transitions. Second operand has 94 states, 94 states have (on average 3.9148936170212765) internal successors, (368), 94 states have internal predecessors, (368), 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 18:06:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:06:24,399 INFO L93 Difference]: Finished difference Result 498 states and 501 transitions. [2021-12-06 18:06:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 18:06:24,399 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.9148936170212765) internal successors, (368), 94 states have internal predecessors, (368), 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 240 [2021-12-06 18:06:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:06:24,401 INFO L225 Difference]: With dead ends: 498 [2021-12-06 18:06:24,401 INFO L226 Difference]: Without dead ends: 371 [2021-12-06 18:06:24,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3855 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3444, Invalid=11808, Unknown=0, NotChecked=0, Total=15252 [2021-12-06 18:06:24,402 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 621 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:06:24,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 621 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:06:24,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-06 18:06:24,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 253. [2021-12-06 18:06:24,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.0119047619047619) internal successors, (255), 252 states have internal predecessors, (255), 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 18:06:24,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2021-12-06 18:06:24,496 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 240 [2021-12-06 18:06:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:06:24,496 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2021-12-06 18:06:24,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.9148936170212765) internal successors, (368), 94 states have internal predecessors, (368), 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 18:06:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2021-12-06 18:06:24,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-06 18:06:24,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:06:24,497 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:06:24,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-12-06 18:06:24,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-12-06 18:06:24,698 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:06:24,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:06:24,699 INFO L85 PathProgramCache]: Analyzing trace with hash -872300322, now seen corresponding path program 70 times [2021-12-06 18:06:24,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:06:24,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778282722] [2021-12-06 18:06:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:06:24,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:06:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:06:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 0 proven. 3459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:06:26,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:06:26,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778282722] [2021-12-06 18:06:26,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778282722] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:06:26,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494195749] [2021-12-06 18:06:26,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:06:26,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:06:26,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:06:26,352 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:06:26,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-06 18:06:26,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:06:26,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:06:26,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-06 18:06:26,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:06:26,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 18:06:26,987 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:06:26,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:06:26,998 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:06:26,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:06:27,060 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:06:27,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:06:28,664 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 19 treesize of output 7 [2021-12-06 18:06:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 3 proven. 3456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:06:28,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:06:29,195 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 20 treesize of output 18 [2021-12-06 18:06:29,197 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 36 treesize of output 32 [2021-12-06 18:06:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 0 proven. 3458 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:06:29,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494195749] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:06:29,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:06:29,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 65] total 97 [2021-12-06 18:06:29,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553852010] [2021-12-06 18:06:29,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:06:29,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-06 18:06:29,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:06:29,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-06 18:06:29,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=8990, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 18:06:29,460 INFO L87 Difference]: Start difference. First operand 253 states and 255 transitions. Second operand has 97 states, 97 states have (on average 3.8247422680412373) internal successors, (371), 97 states have internal predecessors, (371), 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 18:06:35,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:06:35,297 INFO L93 Difference]: Finished difference Result 379 states and 381 transitions. [2021-12-06 18:06:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-06 18:06:35,297 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.8247422680412373) internal successors, (371), 97 states have internal predecessors, (371), 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 244 [2021-12-06 18:06:35,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:06:35,298 INFO L225 Difference]: With dead ends: 379 [2021-12-06 18:06:35,298 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 18:06:35,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 447 SyntacticMatches, 11 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5063 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=717, Invalid=24723, Unknown=0, NotChecked=0, Total=25440 [2021-12-06 18:06:35,300 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 224 mSDsluCounter, 4772 mSDsCounter, 0 mSdLazyCounter, 13636 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 4841 SdHoareTripleChecker+Invalid, 13909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 13636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:06:35,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 4841 Invalid, 13909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 13636 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-06 18:06:35,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 18:06:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 245. [2021-12-06 18:06:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 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 18:06:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2021-12-06 18:06:35,396 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 244 [2021-12-06 18:06:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:06:35,397 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2021-12-06 18:06:35,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.8247422680412373) internal successors, (371), 97 states have internal predecessors, (371), 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 18:06:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2021-12-06 18:06:35,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-06 18:06:35,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:06:35,398 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:06:35,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-12-06 18:06:35,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-12-06 18:06:35,599 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:06:35,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:06:35,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1646263399, now seen corresponding path program 71 times [2021-12-06 18:06:35,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:06:35,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668456323] [2021-12-06 18:06:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:06:35,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:06:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:06:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3452 backedges. 0 proven. 3452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:06:37,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:06:37,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668456323] [2021-12-06 18:06:37,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668456323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:06:37,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174452552] [2021-12-06 18:06:37,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:06:37,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:06:37,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:06:37,473 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:06:37,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5c8558-3780-4e99-a1b2-a456d8b94311/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process